JPH0336524Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hand-held cleaning machine that quickly and easily removes an oxide film formed when a metal material is heat treated in the air.

(Prior Art) When metal materials such as stainless steel materials are welded in air, a band-shaped oxide film is formed along the weld line, and sulfuric acid or hydrochloric acid is mainly used for descaling. At present, instead of immersing metal materials in sulfuric acid or hydrochloric acid solutions, a jelly-like substance containing hydrochloric acid solution is applied onto the oxide film of the metal materials.
Rinse with water after 30 minutes. Another method is to apply paint containing silver powder along a band-shaped oxide film to hide and shield the oxide film. Examples of methods using acids include cathodic electrolysis, anodic electrolysis, and PR electrolysis in a 5-20% solution of sulfuric acid.

(Problem to be solved by the invention) When a jelly-like substance containing a hydrochloric acid solution is used, a pollution problem arises in the treatment of wastewater because the water used for washing has an odor and corrodes other substances. Although the removal effect of this jelly-like material increases when it is heated, there remains the problem that it is necessary to leave it on the oxide film for a long time, resulting in poor working efficiency. Furthermore, applying paint containing silver powder is expensive, and the paint tends to peel off during use. The electrolytic method requires electrolytic equipment and is expensive, and the oxide film on the recesses dissolves more slowly than on the convex parts. Moreover, it cannot treat large metal materials that cannot be immersed in the electrolytic bath, and waste water is Processing issues also remain.

The present invention was proposed to improve the above-mentioned problems regarding the removal of oxide films from metal materials. Even strong oxide films can be removed quickly and easily, and the present invention solves the problem of waste liquid treatment. The purpose is to provide an inexpensive hand-held washing machine that generates almost no waste.

(Means for Solving the Problems) In order to achieve the above object, the hand-held washer 30 according to the present invention, as shown in FIG. It includes one rod-shaped electrode body 6 attached to the electrode body and the other rod-shaped electrode body 8 placed close to the electrode body. The pad 36 is made of a liquid-absorbing material made of cotton wrapped in cloth as shown in the figure, and preferably has sufficient absorption and retention of the dilute acid treatment solution and is wear-resistant. is preferably an insoluble electrode material such as sintered carbon. The electrode body 8 is a mechanism that is biased forward by a spring 10 or the like, or is attracted to a metal material by a magnet piece, so that it can easily come into contact with the metal material. Both electrode bodies 6, 8
is wired to an external power source via the operation switch 12,
A predetermined potential is applied between both electrode bodies using the external power source to locally generate a high current density. Although the electrode body 6 to which the pad 36 is attached is an anode or cathode electrode body, it is also possible to perform electrolysis by the PR method, and it is possible to perform electrolysis at the anode electrode.
Keep the voltage low to avoid generating too much gas such as SO ₂ . A dilute acid treatment liquid whose main component is sulfuric acid or hydrochloric acid is sent to the pad 36 from the tank 32, and an inhibitor or the like may be added to the dilute acid treatment liquid as desired. Metal materials that can be processed include various types of steel such as stainless steel, aluminum, zinc and its alloys. For stainless steel materials, after the oxide film on the surface produced by welding or the like is separated by friction with a water-absorbing member, the activated separated part is sometimes plated with nickel.

(Function) In the cleaning machine 30 of the present invention, the tampon 36 strongly rubs the oxide film 48 on the surface of the metal material while locally generating a high current density and forcibly sending out a desired amount of dilute acid treatment liquid. Just that is enough.
Since this dilute acid treatment liquid does not come out unless the tank 32 is pressed, both electrode bodies 6 and 8 can be set at arbitrary positions. Regarding the metal materials to be treated, cathode electrolysis causes less corrosion of metal materials, maintains dimensional accuracy, and is good for plating adhesion because it is activated. Not suitable for steel or spring steel. On the other hand, in anodic electrolysis, the oxide film is physically removed using carbon gas, and the surface of the metal material becomes passivated, preventing corrosion and mitigating the occurrence of hydrogen embrittlement.
Not suitable for zinc and its alloys.

(Example) To explain the present invention based on the drawings, in a hand-held washing machine 30 shown in FIG. 1, a hollow device main body 34 is elongated and has an upper portion bent horizontally. The pad 36, which is a liquid-absorbing member, is attached to the tip of one rod-shaped electrode body 6, and the other rod-shaped electrode body 8 is placed above the rod-shaped electrode body in close proximity to the electrode body, and both electrode bodies are placed on the tip surface of the upper part of the device. Install it horizontally. Also,
A tank 32 containing a dilute acid treatment liquid is installed at the back of the device main body 34, and the dilute acid treatment liquid is sent directly from the tank to a tampo 36 via a valve 35. The liquid feed pipe 38 extends from the non-conductive valve 35 to the pad 36 through the center hole of the electrode body 6. The tank 32 is a plastic tank equipped with a liquid absorption cap (not shown). The tip of the electrode body 8 is usually pointed and positioned slightly forward of the front surface of the pad 36, and the electrode body 8 is biased forward by a spring 10 within the device body 34. Both electrode bodies 6, 8 are wired to an external power source (not shown) via a manually operated switch 12, and the external power source is, for example, a constant voltage DC power source connected to an AC power source.

This washer 30 is used by gripping the device main body 34 by hand, and by adjusting the strength with which the tank 32 is gripped, the amount of dilute acid treatment liquid sent to the tampo 36 can be adjusted as appropriate. While sending the dilute acid treatment liquid to the pad 36,
When the pad 36 and the tip of the electrode body 8 are placed on top of the oxide film 48 (see FIG. 2) of the metal material and energized, there is a local high temperature between the tip of the electrode body 6 and the surface of the metal material at the pad 36. A current density is generated. The pad 36 and the electrode body 8 are brought into contact with the surface of the metal material, and the cleaning machine 30 is used to clean the oxide film 4 of any shape.
8, the tampon will remove the oxide film 48.
are sequentially separated by rubbing. The consumed dilute acid treatment liquid is only forcibly sent out from the tampo 36, so only a small amount is required, and no waste liquid is generated to the extent that full-scale treatment equipment is required. Both the electrode bodies 6 and 8 are replaceable, and it is sufficient to replace the electrode body 6 as appropriate to use a pad of desired size and material.

A cylindrical body 46 having a hemispherical magnet piece 44 fixed to its tip is fitted into the other electrode body 42 in FIG.
Although the cylinder slides on the electrode body 42 to a limited extent, it does not come off. When the cleaning machine 47 is moved along the oxide film 48, the magnet pieces 44 are attracted to the metal material and keep the electrode body 42 in constant contact with the surface of the metal material, so the tampon 36 rubs the oxide film 48 and separates it one by one. can. If the magnet piece 44 is easily corroded by the dilute acid treatment solution, the magnet piece 44 may be coated with a plastic film.

The washing machine 50 shown in FIG. 3 is a pistol type,
Instead of using a stationary external power source like the washing machine shown in FIG. 1, a desired number of dry batteries 54 with a predetermined voltage are housed in the main body 52 of the device. Electrode bodies 56, 58
is installed parallel to the distal end surface of the horizontal part 60 of the device, and extends from a pad 62 attached to the distal end of the electrode body 56 to a tank 64, with a liquid supply pipe 68 having a valve ( (not shown) and the circumferential surface of the electrode body 56. The tank 64 is a replaceable pressurized cartridge, and the switch 66
When is pressed, the aforementioned valve opens and the dilute acid treatment liquid flows into the tampo 62. The switch 66 has a two-step operation; when the switch is pressed lightly, a direct current flows;
Next, when pressed strongly, the dilute acid treatment liquid is sent from the tank 64 to the pad 62. In FIG. 4, the tip of the liquid feeding tube 70 is formed into a nozzle 72, and the liquid feeding tube is separated from the electrode body 74. This cleaning machine sprays a dilute acid treatment liquid onto the oxide film using a nozzle 72, and
The oxide film is rubbed with the tampo 76 at the tip.

Although not shown, instead of storing the dry battery 54, a charger may be stored in the device main body 52, or a small power source may be attached to the user's waist belt. These modified cleaning machines have improved portability, and can easily remove oxide films 78 that are formed during welding in inconvenient locations, such as welding on large tanks 77 (Figure 5) that cannot be moved. Become.

(Effects of the invention) The cleaning machine of this invention generates a locally high current density and forcibly sends out the desired amount of dilute acid treatment solution, while using a pad made of liquid absorbing material to remove the oxide film on the surface of the metal material. By strongly rubbing the
It quickly and easily removes oxide films from the surface of metal materials, and because it is handheld, it has excellent working efficiency and hardly causes any deterioration of the working environment. In addition, since the dilute acid treatment liquid does not come out unless the tank is pushed, removal work can be carried out in an upward direction, resulting in excellent workability.
The cleaning machine of this invention has simpler electrolytic equipment and lower equipment cost than normal electrolytic methods, and because the tampo friction is used, the oxide film on the recesses does not dissolve more slowly than on the convex parts. Almost never occurs. In addition, since the washing machine of the present invention generally uses only a small amount of dilute acid treatment liquid, it produces less waste liquid than the electrolytic method that installs an electrolytic bath, and this dilute acid treatment liquid has less odor and is comparable to other methods. It does not corrode substances, and there is little risk of pollution problems occurring when treating wastewater.

[Brief explanation of drawings]

Fig. 1 is a side view showing a hand-held washing machine according to the present invention, Figs. 2 to 4 are an overall side view and a partial side view showing modifications of the present invention, respectively, and Fig. 5 is an oxide produced by welding. FIG. 2 is a perspective view of a large tank with a membrane. 30...Handheld washing machine, 36...Tampo, 6,8...
Electrode body, 10... Spring, 12... Operation switch, 48
...Oxide film.

Claims (1)

[Claims for Utility Model Registration] 1. A cleaning machine for removing oxide films produced when metal materials are heat-treated in air, including a tampon impregnated with a dilute acid treatment solution and a machine with the tampo attached to the tip. It is equipped with a rod-shaped electrode body, another electrode body placed close to the electrode body, and a deformable plastic tank containing a dilute acid treatment solution and installed in the main body of the device. By applying an electric potential of A handheld oxide film cleaning machine that can be adjusted. 2.Claim 1: Instead of a stationary external power source, a dry battery or charger of a predetermined voltage is housed in the main body of the device.
The washing machine mentioned. 3. The washing machine according to claim 1, wherein a small power source is attached to the user's waist belt instead of the stationary external power source.