US3074827A - Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces - Google Patents
Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces Download PDFInfo
- Publication number
- US3074827A US3074827A US16657A US1665760A US3074827A US 3074827 A US3074827 A US 3074827A US 16657 A US16657 A US 16657A US 1665760 A US1665760 A US 1665760A US 3074827 A US3074827 A US 3074827A
- Authority
- US
- United States
- Prior art keywords
- solution
- coating
- zinc
- phosphoric acid
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 title description 6
- 239000003973 paint Substances 0.000 title description 4
- 238000011282 treatment Methods 0.000 title description 3
- 230000002401 inhibitory effect Effects 0.000 title description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 42
- 238000000576 coating method Methods 0.000 claims description 39
- 239000011701 zinc Substances 0.000 claims description 31
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 30
- 229910052725 zinc Inorganic materials 0.000 claims description 30
- 239000011248 coating agent Substances 0.000 claims description 27
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 26
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 20
- 235000011007 phosphoric acid Nutrition 0.000 description 18
- 239000000463 material Substances 0.000 description 16
- 235000021317 phosphate Nutrition 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- RZJQYRCNDBMIAG-UHFFFAOYSA-N [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] Chemical class [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] RZJQYRCNDBMIAG-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229940117975 chromium trioxide Drugs 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 241001416092 Buteo buteo Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 229910000151 chromium(III) phosphate Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical class OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12583—Component contains compound of adjacent metal
- Y10T428/1259—Oxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
- Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
Definitions
- This invention resides in a process and solution for treating alloyed zinc coatings, that is, zinc-iron and/or iron-zinc alloyed surfaces, to prevent white rust corrosion (storage stain) under mildly corrosive conditions, and to provide suitable substrate for organic coatings such as paint, lacquer and enamels.
- Zincgrip Another similar type of material was developed and became known as Zincgrip.
- the zinc coating metal has a small percentage of aluminum in it which prevents much alloy formation between the zinc and steel.
- United States Patent 2,487,137 it was taught that this Zincgrip could be made paintable by treating the material with certain phosphate solutions containing fluorine but without actually producing coatings which contained fluorine in anything but very small amounts.
- Zincgrip has the typical galvanize coating spangle, and upon aging it was found that phosphate coated Zincgrip would corrode at the spangle boundaries and cause organic coatings to blister in this area.
- the alloyed zinc coating (with aluminum) which was heat treated so as to produce from a Zincgrip type of alloy, 2. final product in which all the coating metal is in the single phase alloy stage.
- the alloyed zinc coating after heat treating, is substantially homogeneous and is made up of zinc plus about 8 to 12% iron and about .13% aluminum.
- the treating solution of the instant invention is applied to the alloyed surface at temperatures below the boiling point of water.
- the solution is dried on the treated surface by any convenient means at any temperature below 325 Fahrenheit.
- the temperature of application of the solution may be varied from room temperature up to the boing point of water and the optimum temperature is about Fahrenheit. Room temperature, however, will suffice, but if the solution is hotter, the solution will dry itself rather than necessitating the use of hot air blowers and the like to dry the solution.
- the reason for drying below 325 Fahrenheit is to prevent the loss of some of the chrome which is believed would occur if the temperature were above this. It is thought that the hexavalent chromium will go over to trivalent chromium if the temperatures go very much above this range.
- the solution may be applied straight off of the zinc coating line or after or during the temper rolling of the zinc coated material. Temper rolling accomplishes a slight reduction in thickness of the coated material, and this reduction causes heating up of the strip.
- this phosphoric acid-chromic acid solution is applied in or during the temper rolling step, the solution itself does not have to be heated above room temperature because the heat in the strip will cause a rapid drying.
- Equal parts of phosphoric acid and chromic acid have produced satisfactory results but the preferred range is 2 parts phosphoric acid and 1 part chromic acid.
- the preferred concentration of acid is 1% phosphoric acid and /t chromic acid, by weight. With respect to these percentages of the acids in the water solution, it is preferred that they do not go above substantially 10% phosphoric acid and chromic acid. Also, as a low limit, there should be about /2% phosphoric acid and fit% chromic acid.
- the solution may also be applied to the alloyed zinc coating surface to be treated by spray, brush immersion, or by coating rolls.
- the solution of phosphoric acid and chromic acid reacts with the alloyed surface to produce a mixture of phosphates and chromates.
- the phosphates, determined as zinc phosphate, ZN (PO should be in the range of .028 gram per square foot of sheet to .200 gram per square foot of sheet.
- the chromium content of the film (determined as chromium) should be in the range .0005 gram to .004 gram per square foot of sheet (2 square feet of surface). It is possible that a solution more dilute than that above indicated might be used so long as the residue (film obtained) is within the ranges just set forth.
- the ratio of 1 part chromic acid to 2 parts phosphoric acid works well. This ratio may even be more important than the actual amounts used, assuming, of course, that the film' obtained is in the specified ranges. As indicated, however, equal parts have been used.
- the percentage of chromic acid gets too high, the phosphoric acid reaction will slow down. Consequently the use of too much chromic acid produces an oxidizing effect which inhibits the effectiveness of the phosphoric acid.
- the amount of phosphate deposited is preferably about three times that of the chromate. And, if the percentage of phosphoric acid gets too high, it will tend to pickle rather than to carry out the chemical reduction of chromium on the sheet.
- the final result of the reaction of the phosphoric acid and the chromic acid on the alloyed zinc coated surface is to produce a Zn (PO -CrPO complex.
- a process of treating a sheet having a substantially single phase, alloyed zinc coating containingaluminum to prevent white rustand improve paintability which comprises the steps of: preparing a water solution of phosphoric acid and chromic acid in which the" concentration of acid is /2 to 10% phosphoric acid and to 5% chromic acid, the percentages being" by weight, and in which the quantity of phosphoric acid is at least substantially as great as the quantity of chromic acid; applying the solution to the zinc coated sheet at a temperature below the boiling point of water and in sufficient quantity to form phosphates in the range of .028 gram to .200 gram per square foot of sheet, and to form chromates on the coating in the range of .0005 gram to .004 gram of chromium per square foot of sheet; and drying the solution on the coating at a temperature below 325 Fahrenheit. 7
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16657A US3074827A (en) | 1960-03-22 | 1960-03-22 | Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces |
| GB4591/61A GB914797A (en) | 1960-03-22 | 1961-02-07 | Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces |
| DEA36691A DE1258703B (de) | 1960-03-22 | 1961-02-09 | Verfahren zur Behandlung legierter Zinkueberzuege |
| FR853140A FR1281079A (fr) | 1960-03-22 | 1961-02-17 | Perfectionnement au traitement des revêtements de zinc contenant de l'aluminium sousforme alliée |
| BE600837A BE600837A (fr) | 1960-03-22 | 1961-03-02 | Procédé et solution pour le traitement des revêtements de zinc allié. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16657A US3074827A (en) | 1960-03-22 | 1960-03-22 | Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3074827A true US3074827A (en) | 1963-01-22 |
Family
ID=21778268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US16657A Expired - Lifetime US3074827A (en) | 1960-03-22 | 1960-03-22 | Rust inhibitive and paint holding treatment for alloyed zinc iron surfaces |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3074827A (fr) |
| BE (1) | BE600837A (fr) |
| DE (1) | DE1258703B (fr) |
| GB (1) | GB914797A (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3462319A (en) * | 1966-06-13 | 1969-08-19 | Hooker Chemical Corp | Process for coating metal surfaces |
| US4812175A (en) * | 1985-09-06 | 1989-03-14 | Parker Chemical Company | Passivation process and copmposition for zinc-aluminum alloys |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2163583A (en) * | 1937-11-26 | 1939-06-27 | Robert W Buzzard | Treatment of magnesium and its alloys |
| US2200615A (en) * | 1937-12-01 | 1940-05-14 | Clete L Boyle | Method of and composition for cleaning and rendering metal surfaces immune from rust |
| US2303242A (en) * | 1938-11-19 | 1942-11-24 | Parker Rust Proof Co | Metal coating |
| US2412543A (en) * | 1941-07-03 | 1946-12-10 | Parker Rust Proof Co | Coated zinc article and method of making same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE438615A (fr) * | 1940-03-29 |
-
1960
- 1960-03-22 US US16657A patent/US3074827A/en not_active Expired - Lifetime
-
1961
- 1961-02-07 GB GB4591/61A patent/GB914797A/en not_active Expired
- 1961-02-09 DE DEA36691A patent/DE1258703B/de active Pending
- 1961-03-02 BE BE600837A patent/BE600837A/fr unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2163583A (en) * | 1937-11-26 | 1939-06-27 | Robert W Buzzard | Treatment of magnesium and its alloys |
| US2200615A (en) * | 1937-12-01 | 1940-05-14 | Clete L Boyle | Method of and composition for cleaning and rendering metal surfaces immune from rust |
| US2303242A (en) * | 1938-11-19 | 1942-11-24 | Parker Rust Proof Co | Metal coating |
| US2412543A (en) * | 1941-07-03 | 1946-12-10 | Parker Rust Proof Co | Coated zinc article and method of making same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3462319A (en) * | 1966-06-13 | 1969-08-19 | Hooker Chemical Corp | Process for coating metal surfaces |
| US4812175A (en) * | 1985-09-06 | 1989-03-14 | Parker Chemical Company | Passivation process and copmposition for zinc-aluminum alloys |
Also Published As
| Publication number | Publication date |
|---|---|
| GB914797A (en) | 1963-01-02 |
| BE600837A (fr) | 1961-07-03 |
| DE1258703B (de) | 1968-01-11 |
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