CN114277331B - Tower drum surface protection composite material and preparation method and application thereof - Google Patents
Tower drum surface protection composite material and preparation method and application thereof Download PDFInfo
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- CN114277331B CN114277331B CN202111632645.3A CN202111632645A CN114277331B CN 114277331 B CN114277331 B CN 114277331B CN 202111632645 A CN202111632645 A CN 202111632645A CN 114277331 B CN114277331 B CN 114277331B
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- 239000002131 composite material Substances 0.000 title claims abstract description 148
- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 113
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 112
- 238000000576 coating method Methods 0.000 claims abstract description 68
- 239000011248 coating agent Substances 0.000 claims abstract description 67
- 239000003973 paint Substances 0.000 claims abstract description 45
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 239000004593 Epoxy Substances 0.000 claims abstract description 24
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 238000004381 surface treatment Methods 0.000 claims description 22
- 238000005422 blasting Methods 0.000 claims description 21
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 14
- 238000001192 hot extrusion Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 7
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- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 1
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- Application Of Or Painting With Fluid Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a tower drum surface protection composite material and a preparation method and application thereof. According to the invention, a tower cylinder surface protection composite material consisting of an aluminized Al 2O3 fiber composite aluminum alloy coating and a thick-paste epoxy paint and a polyurethane finish paint is formed on the surface of a tower cylinder substrate through aluminized aluminum oxide fiber preparation, aluminized Al 2O3 fiber composite aluminum alloy wire preparation, tower cylinder substrate coating treatment, aluminized Al 2O3 fiber composite aluminum alloy coating strengthening treatment and organic anti-corrosion layer preparation, wherein the thickness of the aluminized Al 2O3 fiber composite aluminum alloy coating is 30-90 mu m, the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m. The prepared tower drum surface protection composite material is suitable for large-scale industrial production, can improve the corrosion resistance of the tower drum in a sand blowing environment, and is suitable for the surface protection of the wind power tower drum.
Description
Technical Field
The invention belongs to the field of composite materials, and particularly relates to a tower drum surface protection composite material, and a preparation method and application thereof.
Background
With the continuous consumption of traditional energy reserves and the increasingly serious environmental problems caused by the utilization of the traditional energy reserves, the development and the utilization of clean energy have become important subjects and contents of the development in the world. Wind energy is an important green energy source, has the advantages of being renewable, clean, pollution-free and wide in distribution, and has wide development and application prospects. The wind power tower drum is used as a supporting foundation and an operation platform of the wind power generator system, and is an important guarantee that the wind power generator system can safely operate. In practical engineering application, vibration fatigue fracture and corrosion damage are the most main forms of failure of wind power towers, and corrosion damage can further cause and aggravate vibration fatigue fracture, so that corrosion prevention treatment is an important point of attention in the field of tower manufacturing.
The outer surface of the existing tower is usually subjected to surface treatment in the following manner, thick slurry type epoxy paint is adopted as a bottom layer, polyurethane finish paint is adopted as a surface layer in a medium corrosion environment, and when long-acting protection is required, the thickness of the bottom layer is increased; in a high-corrosion environment, an epoxy zinc-rich primer is adopted as a bottom layer, an epoxy cloud iron intermediate paint is adopted as a middle layer, a polyurethane finish paint is adopted as a surface layer, and when long-acting protection is needed, the thickness of the middle layer is increased. Along with the continuous and complex environment of application scenes, the influence of factors such as high and low temperature, wind sand, wind and rain, illumination and the like on the wind power tower is increasingly prominent, and the defects of the pure organic protective composite material in the extreme environment are more and more obvious. How to improve the stability of the protection composite material and the protection period of the protection composite material to the tower is significant.
Disclosure of Invention
The invention aims to provide a tower drum surface protection composite material, and a preparation method and application thereof.
First, according to an aspect of the present invention, there is provided a method for preparing a composite material for protecting a surface of a tower, the method comprising the steps of:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 2.0% -5.0% of aluminized Al 2O3 fiber and the balance of Al according to the weight percentage, so as to prepare an aluminum ingot, an aluminum intermediate alloy and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 2.0-5.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 15-20%; drawing the aluminum alloy rod blank into an aluminum-plated Al 2O3 fiber composite aluminum alloy wire with the specification of phi 0.5 mm-phi 1.5mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 10m/min-15m/min, the spraying distance is 200mm, the spraying angle is 25 DEG, and an aluminum-plated Al 2O3 fiber composite aluminum alloy coating with the thickness of 30 mu m-90 mu m is formed on the surface of the tower tube substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.2-0.5MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
The invention also relates to application of the preparation method of the tower surface protection composite material in the field of preparation of tower anticorrosive materials.
According to another aspect of the invention, there is provided a tower surface protective composite prepared according to the preparation method described above.
Further, the tower drum surface protection composite material provided by the invention consists of an aluminized Al 2O3 fiber composite aluminum alloy coating and a thick paste type epoxy paint and polyurethane finish paint which are coated in sequence.
Further, in the tower surface protection composite material, the thickness of the aluminized Al 2O3 fiber composite aluminum alloy coating is 30-90 mu m.
Further, in the tower surface protection composite material, the dry film thickness of the thick paste type epoxy paint is not less than 120 mu m.
Further, in the tower surface protection composite material, the dry film thickness of the polyurethane finish paint is not less than 40 mu m.
Finally, the invention also relates to application of the tower surface protection composite material in the field of tower corrosion prevention.
Compared with the prior art, the preparation method of the tower drum surface protection composite material is suitable for large-scale industrial production, can improve the corrosion resistance of the tower drum in a sand blowing environment, and is suitable for the surface protection of the wind power tower drum.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a graph showing the corrosion morphology of an aluminized Al 2O3 fiber composite aluminum alloy coating after the sample strengthening treatment prepared in example 3;
FIG. 2 is a graph showing the corrosion morphology of the aluminum-plated Al 2O3 fiber composite aluminum alloy coating after the sample strengthening treatment prepared in example 5.
Detailed Description
The embodiments of the present invention will be described in detail below with particular examples, but the following embodiments are merely exemplary in nature and the invention may be embodied or applied in other different embodiments and the details in this specification may be modified or changed from various points of view without departing from the spirit of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition to the specific methods, devices, materials used in the embodiments, any methods, devices, and materials of the prior art similar or equivalent to those described in the embodiments of the present invention may be used to practice the present invention according to the knowledge of one skilled in the art and the description of the present invention.
Example 1
A preparation method of a tower drum surface protection composite material comprises the following steps:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 2.0% of aluminized Al 2O3 fiber and the balance of Al, so as to prepare aluminum ingots, aluminum intermediate alloys and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 2.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 20%; drawing the aluminum alloy rod blank into an aluminized Al 2O3 fiber composite aluminum alloy wire with the specification of phi 0.5mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 15m/min, the spraying distance is 200mm, the spraying angle is 25 degrees, and a 30-mu m aluminum-plated Al 2O3 fiber composite aluminum alloy coating is formed on the surface of the tower barrel substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.2MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
Example 2
A preparation method of a tower drum surface protection composite material comprises the following steps:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 3.0% of aluminized Al 2O3 fiber and the balance of Al, so as to prepare aluminum ingots, aluminum intermediate alloys and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 3.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 20%; drawing the aluminum alloy rod blank into an aluminized Al 2O3 fiber composite aluminum alloy wire with the specification of phi 0.8mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 12m/min, the spraying distance is 200mm, the spraying angle is 25 degrees, and a 50-mu m aluminum-plated Al 2O3 fiber composite aluminum alloy coating is formed on the surface of the tower barrel substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.2MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
Example 3
A preparation method of a tower drum surface protection composite material comprises the following steps:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 4.0% of aluminized Al 2O3 fiber and the balance of Al, so as to prepare aluminum ingots, aluminum intermediate alloys and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 4.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 18%; drawing the aluminum alloy rod blank into an aluminized Al 2O3 fiber composite aluminum alloy wire with the specification of phi 1.0mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 13m/min, the spraying distance is 200mm, the spraying angle is 25 degrees, and a 60-mu m aluminum-plated Al 2O3 fiber composite aluminum alloy coating is formed on the surface of the tower barrel substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.3MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
Example 4
A preparation method of a tower drum surface protection composite material comprises the following steps:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 4.0% of aluminized Al 2O3 fiber and the balance of Al, so as to prepare aluminum ingots, aluminum intermediate alloys and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 4.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 15%; drawing the aluminum alloy rod blank into an aluminized Al 2O3 fiber composite aluminum alloy wire with the specification of phi 1.2mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 10m/min, the spraying distance is 200mm, the spraying angle is 25 degrees, and a 90-mu m aluminum-plated Al 2O3 fiber composite aluminum alloy coating is formed on the surface of the tower barrel substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.5MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
Example 5
A preparation method of a tower drum surface protection composite material comprises the following steps:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 5.0% of aluminized Al 2O3 fiber and the balance of Al, so as to prepare aluminum ingots, aluminum intermediate alloys and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 5.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 15%; drawing the aluminum alloy rod blank into an aluminized Al 2O3 fiber composite aluminum alloy wire with the specification of phi 1.5mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 10m/min, the spraying distance is 200mm, the spraying angle is 25 degrees, and a 90-mu m aluminum-plated Al 2O3 fiber composite aluminum alloy coating is formed on the surface of the tower barrel substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.5MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
Example 6
Salt spray corrosion tests were carried out on the aluminum-plated Al 2O3 fiber composite aluminum alloy coatings obtained after the strengthening treatment in examples 1 to 5 according to the salt spray test method of GB/T10125 artificial atmosphere corrosion test-salt spray test. The test time is 30 days, the spray mode is continuous, the test temperature is 35+/-2 ℃, the salt spray sedimentation rate is 1-2 ml.80 cm -2·h-1, the salt spray corrosive liquid is sodium chloride solution with the concentration of 50 g/l+/-5 g/l, and the PH value of the sodium chloride solution is 7.0. The mass change of each sample was calculated by a weighing method, and the test results are shown in table 1.
TABLE 1
The samples prepared in example 3 and example 5 were observed for corrosion morphology using a scanning electron microscope model JSM-6490 LV. As shown in fig. 1, after 30 days of salt spray corrosion, the sample prepared in example 3 has white corrosion products on the surface of the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating, and the overall particle size of the corrosion products is smaller except for local accumulation; as shown in FIG. 2, compared with example 3, after 30 days of salt spray corrosion, the sample prepared in example 5 has obviously increased white corrosion product particles on the surface of the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating, and is in a multi-region local cluster. This is in agreement with the test results measured by the weighing method.
According to the adhesive force test in the adhesive force performance test method in GB/T9793 thermal spraying metal and other inorganic coating zinc, aluminum and alloys thereof, the adhesive force test is carried out on the aluminized Al 2O3 fiber composite aluminum alloy coating prepared in the examples 1 to 5, when the cross-cut area is 15mm multiplied by 15mm and the scratch interval is 3mm, an adhesive tape is adopted to press the coating in the cross-cut area with a 5N load, and the coating is pulled away quickly along the direction vertical to the surface of the coating, so that the coating is free from peeling and cracking.
Performance tests are carried out on thick paste type epoxy paint and polyurethane finish paint in the tower drum surface protection composite materials prepared in the examples 1 to 5 according to the detection index requirements of the wind power tower drum surface protection layer, and the test results are shown in the tables 2 and 3.
TABLE 2
TABLE 3 Table 3
As can be seen from table 1, the adhesion, salt spray resistance and flexibility of the tower surface protection composite materials prepared in examples 1 to 5 meet the index requirements of wind power tower protection.
The embodiments of the present invention described above do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention as set forth in the appended claims.
Claims (8)
1. The preparation method of the tower drum surface protection composite material is characterized by comprising the following steps of:
1. Preparation of aluminized Al 2O3 fiber composite aluminum alloy wire
1) And (3) batching: the preparation method comprises the following steps of (by weight) proportioning, namely, proportioning 0.22% of Fe, 0.09% of Si, 0.05% of Cu, 0.002% of Mg, 0.02% of Ni, 0.002% of Nd, 2.0% -5.0% of aluminized Al 2O3 fiber and the balance of Al according to the weight percentage, so as to prepare an aluminum ingot, an aluminum intermediate alloy and aluminized Al 2O3 fiber; wherein, the diameter of the aluminized Al 2O3 fiber is 200nm, and the length is 600nm;
2) Preparing a composite alloy melt: melting aluminum ingot at 770 ℃, adding each intermediate alloy, preserving heat at 750 ℃ and carrying out electromagnetic stirring treatment for 20min, standing for 30min, refining, degassing, deslagging and heating to 770 ℃ to obtain aluminum alloy melt; adding 2.0-5.0% of aluminized Al 2O3 fibers into the aluminum alloy melt, carrying out electromagnetic stirring at 750 ℃ for 30min, and standing for 10min to obtain a composite alloy melt;
3) Preparing an aluminized Al 2O3 fiber composite aluminum alloy wire: forming the composite alloy melt into an aluminum alloy rod blank through hot extrusion, wherein the hot extrusion temperature is 640-650 ℃, and the extrusion surface reduction rate is 15-20%; drawing the aluminum alloy rod blank into an aluminum-plated Al 2O3 fiber composite aluminum alloy wire with the specification of phi 0.5 mm-phi 1.5mm through multi-pass drawing forming;
2. Tower tube substrate coating treatment
1) Surface treatment of a tower barrel substrate: carrying out mechanical sand blasting treatment on the surface of the tower barrel substrate by adopting 1mm quartz sand, wherein the sand blasting pressure is 2.0MPa, and the sand blasting distance is 300mm; removing oil by adopting acetone, removing rust by adopting 0.05mol/L dilute hydrochloric acid, washing by adopting deionized water, and drying to obtain a tower barrel matrix after surface treatment;
2) And (3) spraying: spraying aluminized Al 2O3 fiber composite aluminum alloy wires on the surface of the tower barrel substrate after surface treatment by adopting a high-speed spray gun, wherein the spraying temperature is 820 ℃, the spraying air pressure is 1.5MPa, the oxygen pressure is 0.55MPa, and the acetylene pressure is 0.05MPa; the wire feeding speed of the aluminum-plated Al 2O3 fiber composite aluminum alloy wire is 10m/min-15m/min, the spraying distance is 200mm, the spraying angle is 25 DEG, and an aluminum-plated Al 2O3 fiber composite aluminum alloy coating with the thickness of 30 mu m-90 mu m is formed on the surface of the tower tube substrate;
3. Reinforced treatment of aluminized Al 2O3 fiber composite aluminum alloy coating
Carrying out strengthening treatment on the aluminized Al 2O3 fiber composite aluminum alloy coating on the surface of the tower barrel substrate by adopting a dry shot blasting machine, selecting zirconia ceramic shot with the average grain diameter of 0.5mm, wherein the shot blasting pressure is 0.2-0.5MPa, and the shot blasting distance is 250mm, so as to obtain the aluminized Al 2O3 fiber composite aluminum alloy coating after strengthening treatment;
4. Preparation of organic anticorrosive layer
And coating thick-paste epoxy paint and polyurethane finish paint on the reinforced aluminized Al 2O3 fiber composite aluminum alloy coating in sequence, wherein the dry film thickness of the thick-paste epoxy paint is not less than 120 mu m, and the dry film thickness of the polyurethane finish paint is not less than 40 mu m, so as to obtain the tower surface protection composite material.
2. The use of the method for preparing a composite material for protecting the surface of a tower according to claim 1 in the field of preparation of anti-corrosion materials for towers.
3. A tower surface protection composite material, characterized in that it is produced according to the production method of claim 1.
4. The tower surface protection composite according to claim 3, wherein the tower surface protection composite is composed of an aluminized Al 2O3 fiber composite aluminum alloy coating and thick-paste epoxy paint and polyurethane finish paint coated in sequence.
5. The tower surface protective composite of claim 4, wherein the aluminized Al 2O3 fiber composite aluminum alloy coating has a thickness of 30 μm to 90 μm.
6. The tower surface protective composite of claim 5, wherein the thick paste epoxy paint has a dry film thickness of not less than 120 μm.
7. The tower surface protective composite of claim 6, wherein the polyurethane topcoat has a dry film thickness of no less than 40 μm.
8. Use of a tower surface protection composite according to any of claims 3-7 in the field of tower corrosion protection.
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