KR101667291B1 - Electrodeposition coating apparatus and method - Google Patents

Electrodeposition coating apparatus and method Download PDF

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Publication number
KR101667291B1
KR101667291B1 KR1020150092884A KR20150092884A KR101667291B1 KR 101667291 B1 KR101667291 B1 KR 101667291B1 KR 1020150092884 A KR1020150092884 A KR 1020150092884A KR 20150092884 A KR20150092884 A KR 20150092884A KR 101667291 B1 KR101667291 B1 KR 101667291B1
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South Korea
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container
solution
temperature
treated
processed
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KR1020150092884A
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Korean (ko)
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이경
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주식회사 포스코
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/02—Tanks; Installations therefor
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/16—Apparatus for electrolytic coating of small objects in bulk
    • C25D17/22—Apparatus for electrolytic coating of small objects in bulk having open containers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/12—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The present invention provides an electrodeposition coating apparatus and a method. The electrodeposition coating apparatus comprises: a first container upwardly opened on an upper side thereof, allowing a solution to be placed therein; a second container whose portion is at least positioned within the first container and immersed in the solution, having an upwardly open upper portion into which a treatment object is inserted; a support unit formed on an outer side of the first container to move a treatment object in any one of a first direction, a second direction, and a third direction perpendicular to each other; and a power supply unit whose one end portion is positioned within the first container and immersed in the solution and the other end portion thereof connected to the treatment object, thus forming a film on a surface of the treatment object. While the film is formed on the surface of the treatment object, a temperature of the treatment object is controlled to a temperature of the solution in order to suppress a generation of a defect on the film.

Description

[0001] Electrodeposition coating apparatus and method [0002]

The present invention relates to an electrodeposition coating apparatus and method, and more particularly, to an electrodeposition coating apparatus and method capable of suppressing or preventing the occurrence of surface defects.

Steel products, which are supplied as materials in various industrial fields, are supplied as quality products through various quality certification processes. At this time, there is corrosion evaluation as a quality certification process related to corrosion resistance of steel products.

The corrosion evaluation process of a steel product (hereinafter referred to as "material") is as follows. First, the surface of the material is degreased and subjected to a phosphate treatment. Next, the material is deposited in the coating solution to perform electrodeposition coating, and baking is performed. Subsequently, the surface of the workpiece is partially cut, and chlorine spraying test or composite corrosion test is performed, and the degree of corrosion of the workpiece is evaluated.

On the other hand, when a pinhole is formed on the surface of the material in the process of electrodeposition of the material, the result of the chlorine atomization experiment or the complex corrosion experiment is influenced and the reliability of the evaluation result is lowered. Therefore, improvement thereof is required.

KR 10-2001-0048383 A

The present invention provides an electrodeposition coating apparatus and method that can control the temperature of a treated material to a temperature of a solution by using a solution to prevent moisture from being formed on the surface of the treated material.

The present invention provides an electrodeposition coating apparatus and method capable of removing oxygen in a solution from a solution before oxygen adhering to the solution by contact with the atmosphere is adhered to the treated water.

The present invention provides an electrodeposition coating apparatus and method capable of uniformly bringing a solution into contact with a surface of a treated product, thereby preventing defects from being generated during formation of a film on the surface of the treated product.

An electrodeposition coating apparatus according to an embodiment of the present invention includes a first container having an open top and a space for containing a solution therein; A second container having at least a portion thereof located inside the first container, an upper portion opened, and a space into which the process material is inserted; A support formed outside the first vessel to move the workpiece in at least one of a first direction, a second direction and a third direction intersecting with each other; And a power supply part having one end located inside the first container and the other end connected to the processed product.

And at least a part of which is located inside the first container.

An outer width of the second container may be formed such that at least a portion of the second container is spaced apart from an inner surface of the first container, The inner width of the second container can be formed to be in contact with the second container.

The first container may be formed of an insulating material, and at least a part of the second container may be formed of the same material as the processed material or a material having higher thermal conductivity than the processed material.

Wherein the supporting portion includes: a mounting member extending in any one of the first direction and the second direction, the mounting member being positioned on the upper side of the first container, the mounting member being mounted and supported by the processing object; A plurality of fixing members spaced apart from the upper side of the first container in a direction in which the mounting member extends, the mounting member being detachably supported; And a plurality of elevating members formed outside the first container to move the fixing member in the third direction.

The mounting member and the fixing member may be formed of an electrically conductive material, and the other end of the power supply may be connected to the fixing member.

The removal member may be formed of a metal material having a higher degree of oxidation than the treated material.

Wherein the removal member comprises: an area plate formed to surround at least a part of the inner surface of the first container; And a latching plate protruding from the upper surface of the area plate to be detachable from the upper portion of the first container.

An electrodeposition coating method according to an embodiment of the present invention includes: preparing a treated material and a solution; Controlling the temperature of the solution; Controlling the temperature of the treated material to a temperature of the solution using the solution; Immersing the treated material in the solution; And applying a power to the treated material and the solution to form a film on the surface of the treated material.

The process for preparing the treated material and the solution may include preparing a treated material, preparing a first container containing the solution and a second container at least a portion of which is immersed in the solution.

The step of controlling the temperature of the treated product to the temperature of the solution may include a step of inserting the treated product into the second container to control the temperature of the treated product to the temperature of the solution.

And removing oxygen from the solution by dipping a removing member made of a metal having a higher oxidation degree than the treated product into the solution.

According to an embodiment of the present invention, a solution can be used to control the temperature of the treated material to the temperature of the solution. Thus, it is possible to prevent water from being formed on the surface of the treated product in the process of immersing the treated product such as steel into the solution and forming the film on the surface of the treated product in an electrochemical manner. For example, conventionally, since it is difficult to control the temperature of the treated material to the temperature of the solution, it is impossible to prevent moisture from being generated on the surface of the treated material due to the temperature difference between the treated material and the solution. In the embodiment of the present invention, generation of moisture on the surface of the treated material is prevented, and thus it is possible to prevent the occurrence of defects such as pinholes in the film formed on the surface of the treated material.

Further, according to the embodiment of the present invention, oxygen introduced into the solution can be removed by using the removing member before it is adhered to the treated water. Thus, it is possible to prevent oxygen from adhering to the surface of the treated product in the process of immersing the treated product in the solution and forming a film on the surface of the treated product by an electrochemical method, thereby generating defects such as pinholes Can be suppressed or prevented.

As described above, it is possible to prevent moisture or oxygen from adhering to the surface of the treated product during the immersion in the solution of the treated product, so that the solution can be uniformly brought into contact with the surface of the treated product. Occurrence of defects such as pinholes due to oxygen can be suppressed or prevented. Thus, the yield of the whole process can be improved, and the reliability of the corrosion evaluation result of the treated product can be ensured subsequently.

1 is a schematic view for explaining an electrodeposition coating apparatus according to an embodiment of the present invention;
2 is a partial view for explaining an electrodeposition coating apparatus according to an embodiment of the present invention.
3 is a partial view for explaining an electrodeposition painting apparatus according to a modification of the present invention;
4 is a schematic view for explaining an electrodeposition coating method according to an embodiment of the present invention.
5 is a flowchart illustrating an electrodeposition coating method according to an embodiment of the present invention.
6 is a photograph of a result of electrodeposition coating of a treated material according to Examples and Comparative Examples of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The drawings may be exaggerated or enlarged to illustrate embodiments of the invention, wherein like reference numerals refer to like elements throughout.

FIG. 1 is a schematic view showing the entire structure of an electrodeposition coating apparatus according to an embodiment of the present invention, and FIG. 2 is a partial view showing the structure of each component of a prior art coating apparatus according to an embodiment of the present invention. 2 (a) is a partial view showing the second container, Fig. 2 (b) is a partial view showing the removing member, Fig. 2 (c) is a partial view showing the mounting member, 2 (d) is a partial view showing the first container.

First, to describe the embodiment of the present invention, the first direction, the second direction and the third direction are defined as follows. The first direction may be the x-axis direction, the second direction may be the y-axis direction, and the third direction may be the z-axis direction. Of course, the definition of direction as described above is for the purpose of explanation of the present invention, and is not for limitation. Accordingly, the first direction, the second direction, and the third direction can be variously changed.

Next, an electrodeposition coating apparatus according to an embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. The electrodeposition coating apparatus is an apparatus capable of forming a film having a predetermined thickness and having desired components on the surface of the processed product 10 and includes a first container 100, a second container 200, a supporting unit 300, a power supply unit 400, And may further include a removal member 500.

The treated material 10 may include various steels, and may include, for example, high-tensile steel or high-performance steel sheet produced in steelworks as an automobile material product. Of course, the treated material 10 may be various and may be various kinds of materials capable of forming a film of various components on an electrochemical surface. The processed product 10 may be formed in the shape of a plate having a predetermined area, for example, a rectangular plate shape having a width in the second direction smaller than a width in the first direction and the third direction. The treated material 10 can be immersed in the solution 20 and coated in an electrochemical manner.

The solution 20 may be various kinds of solutions containing components of the film to be formed on the surface of the treated product 10. For example, water, a binder and a paste may be mixed at a predetermined component ratio, Solution.

The first container 100 is a container in which the solution 20 is filled, and has a space in which the solution 20 is contained, and the upper portion can be opened upward. For example, the first container 100 may be a container having a cuboid or a rectangular parallelepiped-shaped space opened upward. The fixing hole 110 may be formed at the upper end of the first container 100 and may be formed at both side edges of the upper end of the first container 100 in the first direction, for example. The fixing protrusion 230 of the second container 200 is inserted and fixed in the fixing hole 110 so that the second container 200 can be stably coupled to the first container 100 and supported.

The first container 100 may be provided with a heat supply unit (not shown). The heat supply portion may be, for example, an electric heater, and may be provided at a lower portion of the first container 100, and a portion thereof may be directly or indirectly contacted or connected to the interior of the first container 100, As shown in FIG. The temperature of the solution 20 contained in the first container 100 can be controlled to a desired temperature by using the heat supply unit and maintained. The configuration and the manner of the heat supply unit may be various, and are not particularly limited.

The first container 100 may be provided with stirring means (not shown). The stirring means may be, for example, various electric motors connected to a rotatable impeller, and may be provided at a predetermined position of the first container 100 so that the solution 20 contained in the first container 100 can be stirred. The constitution and the manner of the agitating means may be various and are not particularly limited.

The first container 100 may be formed of an insulating material, for example, a polyvinyl chloride (PVC) material. Thus, the surface of the object to be treated 10 can be painted electrochemically by stably supplying power to the solution 20 and the object 10 contained in the first container 100.

The second container 200 may include a second container body 210, a second container flange 220 and a fixing protrusion 230 as a container into which the processing material 10 is inserted. The second container 200 may be at least partially in the interior of the first container 100 and at least a portion of the second container body 210 may be immersed in the solution 20, ) Can be inserted. The second vessel 200 serves to control the temperature of the treated material 10 to the temperature of the solution 20 by using the temperature of the solution 20. [

The second container body 210 has a space into which the processing material 10 is inserted, and the upper part can be opened upward. For example, the second container body 210 may be a container having a rectangular parallelepiped-shaped space opened to the upper side, and a rectangular parallelepiped-shaped space opened to the upper side may be formed in a second direction May be less than the width in the first direction and the third direction.

The width of the interior of the second container body 210 so that at least a part of the processed product 10 inserted into the interior of the second container body 210 is brought into contact with the inner surface of the second container body 210 . The width of the inside of the second container body 210 in the second direction can be made equal to the width of the processed product 10 in the second direction so that the processing inserted into the inside of the second container body 210 The water 10 can be brought into contact with the inner surface of the second container body 210 so that the heat exchange between the processed product 10 and the second container body 210 can be more easily performed.

The treated product 10 performs heat exchange with the solution 20 via the second vessel body 210. Specifically, the treated product 10 exchanges heat with the solution 20 via the second container body 210 and can be controlled at the same temperature as the temperature of the solution 20. [ Therefore, at least a part of the second container body 210 contacting with the treated product 10 is formed of the same material as the treated product 10 so as to further increase the heat exchange efficiency between the treated product 10 and the solution 20 Or may be formed of a material having a thermal conductivity higher than that of the treated material 10. For example, the material of the second container body 210 may include steel having excellent heat conduction characteristics.

Of course, the material of the second container body 210 may be variously changed, or may be a material having higher thermal conductivity than the first container 100. Accordingly, the heat transfer direction of the solution 20 can be smoothly formed on the side of the second container body 210, not on the outside of the first container 100.

The outer width of the second container body 210 is formed so that at least a part of the second container body 210 located inside the first container 100 is spaced apart from the inner surface of the first container 100 . The outer width of the second container body 210 in the first direction may be less than the width of the first container 100 in the first direction and the width of the second container body 210 in the third direction of the second container body 210 The width of the outside of the first container 100 may be smaller than the width of the inside of the first container 100 in the third direction. Thus, the outer surface of the second container body 210 can be spaced from the inner surface of the first container 100.

The solution 20 contained in the first container 100 can freely flow between the second container body 210 and the first container 100 to flow in the vicinity of the second container body 210, The solution 20 can be uniform in temperature regardless of its position.

The second container flange 220 may protrude outward from the upper end of the second container body 210 while the second container body 210 is positioned inside the first container 100, And is positioned at the upper end of the container 100 to support the second container body 210. The material of the second container flange 220 is not particularly limited and may be the same material as the material of the second container body 210 or may be a rubber material that can be stably stood on the upper end of the first container 100 Lt; / RTI >

On the other hand, the processed product 10 is mounted on and supported by a mounting member 310 described later of the supporting part 300. When the processed product 10 is inserted into the second container body 210, The mounting member 310 can be contactably supported on the upper surface of the second container body 210 of the processed product 10 so as to be stably positioned inside the second container body 210 of the processed product 10. [

The fixing protrusions 230 protrude downward from the lower surface of the second container flange 220 and may be formed at both side edges of the second container flange 220 in the first direction. The fixing protrusion 230 is inserted and fixed in the fixing hole 110 of the first container 100 to stably fix the second container flange 220 to the upper end of the first container 100.

The support portion 300 is a support portion provided in the first container 100 to move the processing object 10 in at least one direction and is a processing portion in a third direction among the first direction, May be provided to move the water 10, for example, to the outside of the first vessel 100. The support portion 300 may include, for example, a mounting member 310, a fixing member 320, and an elevating member 330.

The mounting member 310 may extend in any one of the first direction and the second direction and may be positioned on the upper side of the first container 100. For example, the mounting member 310 may be a bar-shaped member extending in a first direction, and at least one processing object 10 may be mounted on one surface of the mounting member 310 and supported. The mounting member 310 may be formed of an electrically conductive material including, for example, metal.

A plurality of magnets (not shown) may be provided on one side of the mounting member 310 on which the processed product 10 is mounted. The mounting member 310 may be fixed to the mounting member 310 using magnetic force, As shown in Fig. Of course, various methods can be applied to the method of mounting and fixing the processing object 10 on one side of the mounting element 310. For example, the processing object 10 may be attached to the mounting element 310, A coupling method can be applied.

The fixing members 320 may be spaced apart from each other in the first direction on the upper side of the first container 100 and may have a structure in which both side ends of the mounting member 310 are easily detachably coupled. For example, the fixing member 320 may be a block of a predetermined shape having a slot in a first direction at an upper portion thereof. The mounting member 310 can be detachably supported on the fixing member 320 as both side ends of the mounting member 310 are inserted into or separated from the slots of the fixing member 320. [ The fixing member 320 may be formed of an electrically conductive material including, for example, metal.

The elevating member 330 may be formed on the outside of the first container 100 to move the fixing member 320 in the third direction. The structure of the elevating member 330 may vary, and for example, various structures of hydraulic or mechanical cylinders may be applied. The elevating members 330 may be mounted on the outer surface of the first container 100, respectively, in the first direction, and extend in the third direction. A fixing member 320 may be mounted on and supported by the upper portion of the lifting member 330.

The lifting member 300 descends so that the processed product 10 is immersed in the solution 20 and the other end 420 of the power supply unit 400 connected to the fixing member 320 and the solution One end 410 of the immersed power supply unit 400, which will be described later, may be electrically connected. The elevation member 300 is lifted so that the treated product 10 is separated from the solution 20 and the other end 420 of the power supply unit 400 connected to the fixing member 320 is immersed in the solution 20. [ One end 410 of the power supply 400 may be electrically disconnected. That is, the elevating member 330 serves to move the fixing member 320 up and down, and to electrically connect or disconnect the processing object 10 and the solution 20.

The power supply unit 400 is a power supply unit having one end connected to the solution 20 in the first vessel 100 and the other end connected to the processed product 10 and a rectifier 430 One end 410 of the power supply unit 400 connected to the anode electrode of the rectifier 430 is located inside the first vessel 100 and is immersed in the solution 20. The rectifier 430, The other end 420 of the power supply unit 400 connected to the cathode electrode of the processing unit 10 may be connected to the fixing member 320 and connected to the processing object 10.

At least a portion of the removing member 500 may be located in the interior of the first container 100 and may be immersed in the solution 20. [ The removing member 500 serves as a deoxidizing agent and may be formed of a metal material having a higher oxidation degree than the treated material 10 for this purpose. For example, the removing member 500 may be formed of a metal material such as aluminum and magnesium.

The removal member 500 includes an area plate 510 formed to surround at least a part of the inner surface of the first container 100 and a protrusion 510 protruding from the upper surface of the area plate 510 so as to be detachable from the upper portion of the first container 100 And a latching plate 520 may be formed.

The area plate 510 is disposed along the periphery of at least one of the inner surfaces of the first container 100 so as to facilitate contact with the solution 20 in a large area and to react with oxygen in the solution 20 to remove oxygen. As shown in FIG. The shape of the latching plate 520 is not particularly limited and may be formed so as to protrude outward from the top of the area plate 510 such that the cross section of one side of the latching plate 520 is annular in the third direction , And can be inserted and supported at the upper end of the first container 100.

3 is a partial view showing the structure of a removing member of the electrodeposition coating apparatus according to a modification of the present invention. As such, the removal member 500 'can be deformed into a variety of shapes and can be disposed along the periphery of at least three of the inner surfaces of the first container 100 to widen the inner surface of the first container 100 For example, a ' C ' -shaped area plate 510 ' extending and a latching plate 520 '

4 is a schematic view showing an electrodeposition coating process using an electrodeposition coating apparatus according to an embodiment of the present invention. 4 (a) is a schematic view showing a process of controlling the temperature of a treated material to a temperature of a solution, and FIGS. 4 (b) to 4 (c) FIG. FIG. 5 is a flow chart of an electrodeposition coating method according to an embodiment of the present invention, and FIG. 6 is a photograph of a result of electrodeposition coating of a processed product according to an embodiment of the present invention and a comparative example.

Next, an electrodeposition painting method according to an embodiment of the present invention will be described with reference to Figs. 4 to 6. Fig.

The electrodeposition coating method is a method of forming a predetermined film on the surface of a treated product, including a process of preparing a treated product and a solution, a process of controlling the temperature of the solution, a process of controlling the temperature of the treated product by using the solution, A step of immersing the water in a solution, a step of applying a power to the treated material and the solution to form a film on the surface of the treated material, and after any one of these processes, a metal material having a higher oxidation degree than the treated material And removing the oxygen from the solution by immersing the removing member in the solution.

Here, the process of preparing the treated material and the solution may include a process of preparing the treated material, a first container containing the solution therein, and a second container containing at least a part of the solution immersed in the solution. In addition, the process of controlling the temperature of the treated product to the temperature of the solution may include a step of inserting the treated product into the second container to control the temperature of the treated product to the temperature of the solution.

First, a treated material is prepared and a solution is prepared (S100). The treated product 10 can be prepared by removing foreign substances from the surface through a degreasing process, a surface conditioning process, and a phosphate process, forming a reaction nucleus and a chemical conversion film on the surface thereof, To the mounting member 310 of the supporting part 300. [ The solution 20 is prepared by being contained in the first vessel 100.

Then, the temperature of the solution 20 is controlled (S200). The solution 20 is controlled at a temperature of 30 ° C to 35 ° C by using a heat supply part (not shown) provided in the first vessel 100. Here, the above-mentioned temperature range in which the solution 20 is controlled may be a temperature range in which the solids contained in the solution 20 can be easily formed into a film on the surface of the treatment object 10 in an electrochemical manner.

Subsequently, the temperature of the treated product 10 is controlled to the temperature of the solution 20 (S300) using the solution 20. The treated material 10 is inserted into the interior of the second vessel 200 and brought into indirect contact with the solution 20 and heat exchange with the solution 20 under control at a temperature of 30 캜 to 35 캜 is used to remove the treated material 10 is controlled to a temperature of 30 to 35 캜 (see Fig. 4 (a)).

The temperature of the treated material 10 and the temperature of the solution 20 can be matched with each other and thus the temperature of the treated material 10 and the solution 20 It is possible to effectively prevent moisture from being generated and aggregated. From this, it is possible to effectively inhibit or prevent the generation of pinhole defects in the process of forming the film on the surface of the treated product (10).

Then, when the temperature of the processing object 10 is controlled, the processing object 10 is separated from the second container 200, the mounting member 310 is inserted into the fixing member 320, The treated material 10 is immersed in the solution 20 (S400) through a series of processes. This is shown in Fig. 4 (b) to Fig. 4 (c) sequentially.

Here, the time for completing the temperature control of the object to be treated 10 can be determined to be, for example, within a few minutes, corresponding to the time taken to form the film on the surface of the object 10, The weight of the object to be treated 10 can be determined by calculating the time taken for the object to be processed 10 to be controlled at the initial temperature to the temperature of the solution 20,

On the other hand, if any of the above-mentioned solution preparation process, solution temperature control process, process water temperature control process, and the process of immersing the treatment product in the solution is being carried out or after the process is performed, The process of removing oxygen from the solution 20 can be performed by immersing the member 500 in the solution 20 (S500). For example, the solution 20 can be deoxidized by immersing the removal member 500 in the solution 20 together with preparing the solution 20 in the first container 100. Of course, the deoxidizing process using the removing member 500 can be performed during various processes.

By this process, the large amount of oxygen mixed in the solution 20 by stirring and circulating the solution 20 is first removed by reacting with the removing member 500 before being adhered to the surface of the treated product 10, The adhesion of oxygen to the surface of the water 10 can be effectively prevented. From this, it is possible to effectively inhibit or prevent the generation of pinhole defects in the process of forming the film on the surface of the treated product (10).

The process 10 is immersed in the solution 20 and power is applied to the treatment 10 and the solution 20 to form a film on the surface of the treatment product S600. Specifically, the processed product 10 is immersed in the solution 20, and the other end 420 of the power supply part 400, the fixing member 320, the mounting member 310, the processed product 10, An electrochemical circuit is formed that includes the power supply unit 400 and the rectifier 430 of the power supply unit 400. The positive electrode power is applied to the solution 20 using the electrochemical circuit, , It is possible to apply the negative electrode power source to the treated product (10). An electrochemical reaction is performed on the surface of the treated material 10 by application of a power source and a predetermined film can be electrodeposited on the surface of the treated material 10.

On the other hand, during the process of forming the film on the surface of the treated material 10, another processed material may be prepared and inserted into the second container 200 to raise the temperature to the temperature of the solution 20. [ Thus, the process of forming a film on a plurality of treatments can be continuously and repeatedly performed.

6 (a) is a photograph of a processed product after electroforming a film on the surface of the treated product in a conventional manner. Fig. 6 (b) is a photograph of a processed product after electroforming a film on the surface of the treated product according to an embodiment of the present invention. Comparing these figures, it can be seen that in the conventional method, many pinhole defects were generated on the surface of the treated material. On the other hand, when a film is formed on the surface of a treated material by the electrodeposition coating method using the electrodeposition coating apparatus according to the embodiment of the present invention, it can be confirmed that no defect is formed on the surface of the treated material.

It should be noted that the above-described embodiments of the present invention are for the purpose of illustrating the present invention and not for the purpose of limitation of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. You will understand.

10: treated water 20: solution
100: first container 200: second container
300: Support part 400: Power supply part
500: removal member

Claims (13)

A first container in which a solution is filled;
At least a part of which is located inside the first container and into which the processing material is introduced;
A support provided on the exterior of the first container to move the processed product in at least one direction;
A power supply part having one end connected to the solution of the first container and the other end connected to the processed product; And
And at least a part of which is located inside the first container. delete The method according to claim 1,
Wherein an outer width of the second container is formed such that at least a part of the second container is spaced apart from the inner surface of the first container. The method according to claim 1,
Wherein an inner width of the second container is formed such that at least a part of the processed product contacts the second container inside the second container. The method according to claim 1,
Wherein the first container is formed of an insulating material,
Wherein at least a part of the second container is formed of the same material as the processed material or a material having higher thermal conductivity than the processed material. Claim 1
Wherein the support is provided to move the workpiece in a third one of a first direction, a second direction and a third direction intersecting with each other,
The support portion
A mounting member extending in any one of the first direction and the second direction and positioned above the first container, the mounting member being mounted and supported by the processing object;
A plurality of fixing members spaced apart from the upper side of the first container in a direction in which the mounting member extends, the mounting member being detachably supported; And
And a plurality of elevating members formed outside the first container to move the fixing member in the third direction. The method of claim 6,
Wherein the mounting member and the fixing member are formed of an electrically conductive material,
And the other end of the power supply unit is connected to the fixing member. The method according to claim 1,
Wherein the removing member is formed of a metal material having a higher oxidation degree than the processed product. The method according to claim 1,
Wherein the removal member comprises: an area plate formed to surround at least a part of the inner surface of the first container; And an engaging plate protruding from an upper portion of the area plate to be detachable from the upper portion of the first container. Filling the first container with the solution and introducing the processing solution into the second container to prepare the treated material and the solution;
Controlling the temperature of the solution filled in the first vessel;
Controlling the temperature of the treated material in the second vessel to a temperature of the solution using the solution filled in the first vessel;
Immersing the treated material in the solution;
Forming a film on the surface of the processed material by applying power to the processed material and the solution; And
And immersing the removing member in the solution. The method of claim 10,
The process of preparing the treated material and the solution includes:
Preparing a treated product, and preparing the first container containing the solution and the second container in which at least a part of the solution is immersed in the solution. The method of claim 11,
The process of controlling the temperature of the treated material to the temperature of the solution includes:
And inserting the processed material into the second container to control the temperature of the processed material to a temperature of the solution. The method of claim 10,
And removing the oxygen from the solution by immersing the removal member of a metal material having a higher oxidation degree than the treated product in the solution.
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KR20190043770A (en) 2017-10-19 2019-04-29 주식회사 포스코 Apparatus for solid control and paint supply tank having the same
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