KR101219712B1 - Method for preprocessing electropainting - Google Patents

Method for preprocessing electropainting Download PDF

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KR101219712B1
KR101219712B1 KR1020100076641A KR20100076641A KR101219712B1 KR 101219712 B1 KR101219712 B1 KR 101219712B1 KR 1020100076641 A KR1020100076641 A KR 1020100076641A KR 20100076641 A KR20100076641 A KR 20100076641A KR 101219712 B1 KR101219712 B1 KR 101219712B1
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surface adjustment
liquid
adjustment liquid
coating
workpiece
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KR1020100076641A
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Korean (ko)
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KR20120014517A (en
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김선영
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대영엔지니어링 주식회사
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    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying

Abstract

본 발명은 전착도장의 전처리방법에 관한 것으로서, 더욱 상세하게는 탈지 및 수세 공정 이후 화성피막 공정 이전에 수행되는 표면조정공정 단계에서 표면조정액의 오염도 및 알카리도를 관리기준범위 내로 관리 및 유지함으로써, 표면조정에 의한 피도물의 활성점을 증가시켜 화성피막 결정의 균일성 및 치밀성을 확보할 수 있는 전착도장의 전처리방법에 관한 것이다.The present invention relates to a pretreatment method of electrodeposition coating, and more particularly, by controlling and maintaining the contamination degree and alkalinity of the surface adjustment liquid within the management standard range in the surface adjustment process step performed after the degreasing and washing process before the chemical conversion process, The present invention relates to a method for pretreatment of electrodeposition coating that can increase the active point of the coating material by adjustment to ensure uniformity and compactness of the chemical film crystals.

Description

전착도장의 전처리방법{Method for preprocessing electropainting}Method for preprocessing electropainting

본 발명은 전착도장의 전처리방법에 관한 것으로서, 더욱 상세하게는 피도물에 전착도장을 하기 전에 준비하는 과정 중 화성피막 공정 이전에 피도물의 표면입자를 균일하고 치밀하게 하는 전착도장의 전처리방법에 관한 것이다.
The present invention relates to a method for pretreatment of electrodeposition coating, and more particularly, to a method for pretreatment of electrodeposition coating that uniformly and densifies the surface particles of the coating prior to chemical conversion during preparation of electrodeposition coating on the coating. .

일반적으로 금속소재 표면을 표면처리하는 도장작업은 전착도장, 정전분체도장 등이 알려져 있으며, 상기 전착도장방법으로는 랙(Rack, 또는 Hanger) 타입이나 바스켓(Basket) 타입의 전착도장작업 등이 널리 사용되고 있다.In general, the coating work for surface treatment of the metal material surface is known as electrodeposition coating, electrostatic powder coating, etc., the electrodeposition coating method is widely used for electrodeposition coating work of the rack (rack or hanger) type or basket (basket) type. It is used.

상기 랙타입 또는 바스켓 타입의 전착도장 작업 등은 랙에 표면처리하고자 하는 피도물을 다수 걸어서 이를 전착도료가 수납된 처리조 내에 침강시켜 처리조 내의 전착도료(+)가 피도물(-)에 전착되어 도장작업이 이루어지도록 한 것이다.In the rack type or basket type electrodeposition coating work, a plurality of coating objects to be surface-treated on a rack are settled and settled in a treatment tank in which electrodeposition paint is stored, so that the electrodeposition paint (+) in the treatment tank is electrodeposited to the coating (-) and painted. The work was done.

상기 전착도장 작업을 하기 전에 전처리 과정을 거치게 되는데, 전처리 과정이란 피도물에 도료를 도포하기 위한 준비과정을 말하는 것으로, 피도물에 부착된 유분을 제거하고, 인산염 피막을 형성시키는 과정을 의미한다.Before the electrodeposition coating, the pretreatment process is performed. The pretreatment process refers to a preparation process for applying a paint to the coating material, and means a process of removing oil from the coating material and forming a phosphate coating film.

상기 전처리의 목적은 철, 아연 등 피도물의 금속표면에 방식성이 있는 인산염 피막을 생성시켜 도장에 우수한 내식성과 밀착성을 부여하는 데 있다.The purpose of the pretreatment is to produce an anticorrosive phosphate film on the metal surface of the coating object such as iron and zinc to give excellent coating resistance and adhesion to the coating.

상기 전처리의 공정은 탕세→ 예비탈지→ 본탈지→ 1차수세→ 2차수세→ 표면조정→ 화성피막→ 3차수세→ 4차수세→ 순수세→ 건조→ 전착도장을 거치게 된다.In the pretreatment process, hot water washing → preliminary degreasing → main degreasing → first washing → second washing → surface adjustment → chemical coating → third washing → fourth washing → pure washing → drying → electrodeposition coating.

상기 탈지는 철강(피도물) 표면에 부착된 광물성이나 식물성 등 다양한 종류의 기름(유지분)을 철강 표면으로부터 제거하는 공정이고, 탈지방법에는 용제탈지, 에멀젼탈지, 전해세척법, 알카리 세척법 등이 있다.The degreasing is a process of removing various kinds of oils (oils and fats) such as minerals and vegetation attached to the surface of the steel (painted material) from the surface of the steel, and the degreasing method includes solvent degreasing, emulsion degreasing, electrolytic cleaning, and alkali cleaning. have.

강 알칼리나 중 알카리 탈지 공정 및 산세공정을 거치는 경우에 금속의 표면은 구조상 활성점을 거의 잃게 되어 피막이 거칠고 조대한 피막을 얻게 된다.In the case of strong alkali or heavy alkali degreasing and pickling, the surface of the metal almost loses its active point in structure, resulting in a rough and coarse film.

이러한 이유 때문에 금속의 표면에 자유에너지를 부여하여 활성점의 수를 증가시킬 필요가 있고, 활성점의 수가 많아지게 되면 자유에너지의 증가로 화성처리 시에 결정의 핵 수가 증가하게 되고, 그 결과 미세하고 균일한 결정의 피막을 입혀주게 된다. 이러한 작용을 하는 것을 표면조정제라 한다.For this reason, it is necessary to increase the number of active points by giving free energy to the surface of the metal. When the number of active points increases, the number of active points increases the number of nuclei of crystals during chemical conversion, resulting in fine And a uniform coating of crystals is applied. This action is called surface conditioner.

이와 같이 상기 표면조정은 철강 표면을 활성화시켜주는 공정이고, 표면조정제로서 수산 등의 약품을 사용한다.As described above, the surface adjustment is a process for activating the steel surface, and chemicals such as fish and the like are used as the surface adjustment agent.

이때, 2~3%의 수산용액으로 철강 표면을 처리하면, 에칭 후 얇은 수산철 피막이 생성되어 화성피막 생성시 핵으로 된다.At this time, when the steel surface is treated with 2% to 3% of aquatic solution, a thin iron hydroxide film is formed after etching, and becomes a nucleus when the chemical conversion film is generated.

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도 1은 표면조정제를 철강 표면에 처리하지 않은 경우와 표면조정제를 철강표면에 처리한 경우 활성점 및 결정을 비교하여 보여주는 개략도이다.FIG. 1 is a schematic view showing a comparison of active points and crystals when the surface modifier is not treated on the steel surface and when the surface modifier is treated on the steel surface.

도 1을 참조하면, 표면조정제를 철강 표면에 처리한 경우가 표면조정제를 철강 표면에 처리하지 않은 경우보다 철강표면에 활성점(10)의 수가 더 많고, 이 활성점(10)의 증가로 인산 아연 결정(11)의 수가 증가함으로써, 상기 인산 아연의 결정(11)이 균일하고 치밀해진다.Referring to FIG. 1, when the surface modifier is treated on the steel surface, the number of active points 10 is greater on the steel surface than when the surface modifier is not treated on the steel surface. As the number of zinc crystals 11 increases, the crystals 11 of zinc phosphate become uniform and dense.

다시말해서, 상기 표면조정제는 전착도장공정의 전처리 공정 중 철강 표면에 활성점(10)을 증가시킴으로써, 후공정인 화성피막 공정에서 인산 아연 피막 형성시 인산 아연의 결정(11)을 균일하고 치밀하게 하는 역할을 한다.In other words, the surface modifier increases the active point 10 on the surface of the steel during the pretreatment process of the electrodeposition coating process, thereby uniformly and densely forming the crystals of zinc phosphate 11 during the formation of the zinc phosphate film in the subsequent chemical conversion process. It plays a role.

그러나, 상기 표면조정공정의 이전에 알카리 세척방법에 의해 피도물(20)로부터 알카리 탈지제를 완전히 제거하지 않는 경우 피도물(20)의 표면에 잔존하는 탈지제에 의해 표면조정액이 오염되고, 이로 인해 표면조정액과 피도물(20)이 화학반응을 잘 이루어지지 않는 문제점이 있다.
However, if the alkali degreasing agent is not completely removed from the object 20 by the alkali cleaning method before the surface adjustment process, the surface adjustment liquid is contaminated by the degreaser remaining on the surface of the object 20, and thus The object 20 has a problem that the chemical reaction is not made well.

본 발명은 상기와 같은 점을 감안하여 발명한 것으로서, 피도물의 전처리 공정에 있어서 표면조정액의 알카리도, 오염도 및 처리시간 등을 적절한 범위 내로 관리 및 유지함으로써, 후공정인 화성피막 공정에서 피막의 결정을 균일하고 치밀하게 할 수 있는 전착도장의 표면처리방법을 제공하는데 그 목적이 있다.
The present invention has been invented in view of the above, and in the pretreatment process of the coating material, by controlling and maintaining the alkalinity, contamination degree, and treatment time of the surface adjustment liquid within an appropriate range, the film is crystallized in the later chemical conversion step. It is an object of the present invention to provide a method for surface treatment of electrodeposition coating, which can be uniform and precise.

본 발명은 피도물에 전착도장을 하기 전에 준비하는 공정 중 탈지 및 수세 단계 이후 화성피막 이전에 이루어지는 표면조정 단계이고, 상기 표면조정단계는The present invention is a surface adjustment step made before the chemical conversion film after degreasing and washing step in the preparation process before the electrodeposition coating to the coating, the surface adjustment step

피도물을 표면조정챔버의 내부로 이동시키는 단계; 표면조정액용 펌프를 작동시키는 단계; 상기 표면조정챔버의 내부에 장착된 스프레이 노즐을 통해 표면조정액을 피도물에 분사시키는 단계; 및 상기 표면조정액이 피도물과 화학반응하여 피도물의 표면입자를 균일하고 치밀하게 하는 단계를 포함하여 이루어지고, 수세공정에서 세척되지 않아서 피도물에 잔존하는 알카리 탈지제가 표면조정공정 중 표면조정액에 오염된 정도(오염도 및 알카리도)를 주기적으로 체크함으로써, 표면조정에 의해 피막 결정의 균일성 및 치밀성을 향상시킬 수 있는 전착도장의 전처리방법을 제공한다.
Moving the workpiece into the surface adjustment chamber; Operating the pump for the surface adjustment liquid; Spraying a surface adjustment liquid onto the object through a spray nozzle mounted in the surface adjustment chamber; And chemically reacting the surface adjusting liquid with the surface of the coating to make the surface particles uniform and dense. By periodically checking (contamination degree and alkalinity), there is provided a pretreatment method for electrodeposition coating that can improve the uniformity and compactness of the coating crystals by surface adjustment.

본 발명에 따른 전착도장의 전처리방법의 장점을 설명하면 다음과 같다.The advantages of the pretreatment method of electrodeposition coating according to the present invention are as follows.

1. 표면조정공정 단계에서 표면조정액의 오염도 및 알카리도를 관리기준범위 내로 관리 및 유지함으로써, 표면조정에 의한 피도물의 활성점을 증가시켜 화성피막 결정의 균일성 및 치밀성을 확보할 수 있는 장점이 있다.
1. By controlling and maintaining the degree of contamination and alkalinity of the surface adjustment liquid within the management criteria in the surface adjustment process step, it is possible to increase the active point of the coating by surface adjustment to ensure uniformity and compactness of the chemical film crystals. .

도 1은 표면조정액으로 피도물을 처리하기 전후 모습을 보여주는 개략도
도 2는 본 발명의 일실시예에 따른 표면조정챔버의 내부 모습을 보여주는 사진
도 3은 본 발명의 일실시예에 따른 표면조정장치의 구성을 보여주는 블록도
도 4는 표면조정액의 알카리도를 측정하는 방법을 보여주는 개략도1 is a schematic view showing a state before and after treating a coating object with a surface adjustment liquid
Figure 2 is a photograph showing the inside of the surface adjustment chamber according to an embodiment of the present invention
Figure 3 is a block diagram showing the configuration of a surface adjustment apparatus according to an embodiment of the present invention
Figure 4 is a schematic diagram showing how to measure the alkalinity of the surface adjustment liquid

이하, 본 발명에 따른 바람직한 실시예를 첨부도면을 참조하여 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 발명은 전착도장작업을 하기 전에 피도물(20)에 도료를 도포하기 위한 준비작업을 하는 전처리 공정 중 표면조정 단계에 관한 것이다.The present invention relates to a surface adjustment step of the pretreatment process for preparing the coating 20 to the coating 20 before the electrodeposition coating.

상기 표면조정단계는 전착도장작업의 전처리공정 중 탈지 및 수세 공정 후 화성피막공정 전에 이루어지는 단계이다.The surface adjustment step is a step made before the chemical conversion process after degreasing and washing in the pretreatment process of the electrodeposition coating work.

상기 표면조정단계는 탈지 및 수세 공정이 완료된 피도물(20)을 표면조정 단계로 이동시키는 단계; 표면조정액용 펌프(21)를 작동시키는 단계; 스프레이 노즐(16)을 통해 표면조정액을 피도물(20)에 분사하여, 상기 피도물(20)과 표면조정액의 화학반응에 의해 피도물(20)의 입자를 활성화시키는 단계를 포함한다.The surface adjustment step includes the step of moving the object 20, the degreasing and washing process is completed to the surface adjustment step; Operating the pump 21 for the surface adjustment liquid; Spraying the surface adjustment liquid to the coating 20 through the spray nozzle 16, thereby activating the particles of the coating 20 by the chemical reaction of the coating 20 and the surface adjusting liquid.

또한, 이와 같이 활성화된 피도물(20)을 다음공정인 화성피막 공정으로 이동시킨다.In addition, the activated coating 20 is moved to the next chemical conversion film process.

상기 표면조정단계는 표면조정챔버(14) 내에서 이루어진다.The surface adjustment step is performed in the surface adjustment chamber 14.

상기 표면조정챔버(14)는 천정에 피도물(20)을 걸 수 있도록 내부에 장착된 행거(17)와, 상기 행거(17)에 걸려진 피도물(20)에 표면조정액을 분사하기 위해 내부에 사방(상하좌우)으로 배치된 다수의 스프레이 노즐(16)과, 상기 스프레이 노즐(16)을 연결하고 스프레이 노즐(16)에 표면조정액을 공급하기 위해 내부에 전후방향으로 일정한 간격을 두고 장착된 표면조정액 공급관(15)을 포함한다.
즉, 도 2에서 볼 수 있듯이, 표면조정챔버(14)의 내부에는 표면조정액이 공급되는 다수의 표면조정액 공급관(15)이 천정부, 양쪽 벽면부, 바닥부에 걸쳐 설치되고, 각 표면조정액 공급관(15)에는 다수의 스프레이 노즐(16)이 설치되어, 도면에 도시되어 있는 화살표 방향과 같이 피도물(20)의 상부, 양측부, 하부로 표면조정액이 분사될 수 있도록 구성된다. The surface adjustment chamber 14 has a hanger 17 mounted therein so as to hang the workpiece 20 on the ceiling, and the inside of the surface adjustment liquid to spray the surface adjustment liquid on the workpiece 20 caught by the hanger 17. A plurality of spray nozzles 16 arranged in (up, down, left, and right) and surface adjustment liquids mounted at regular intervals in the front and rear directions to connect the spray nozzles 16 and supply the surface adjustment liquids to the spray nozzles 16. And a supply pipe 15.
That is, as can be seen in Figure 2, inside the surface adjustment chamber 14, a plurality of surface adjustment liquid supply pipe 15 to which the surface adjustment liquid is supplied is provided across the ceiling, both wall portions, and the bottom, and each surface adjustment liquid supply pipe ( 15 is provided with a plurality of spray nozzles 16, so that the surface adjustment liquid can be injected into the upper, both sides, the lower portion of the workpiece 20 as shown by the arrow shown in the figure.

상기 표면조정액 공급관(15)은 표면조정액용 펌프(21)에 연결된다.The surface adjustment liquid supply pipe 15 is connected to the surface adjustment liquid pump 21.

상기 표면조정챔버(14)의 저면에는 배출구가 형성되고, 이 배출구는 재순환라인(18)에 의해 표면조정액 저장탱크(19)와 연결됨으로써, 피도물(20)에 분사된 표면조정액은 리턴라인을 통해 표면조정액 저장탱크(19)로 순환된다.A discharge port is formed at the bottom of the surface adjustment chamber 14, and the discharge port is connected to the surface adjustment liquid storage tank 19 by the recirculation line 18, so that the surface adjustment liquid sprayed on the workpiece 20 is returned through the return line. It is circulated to the surface adjustment liquid storage tank 19.

상기 표면조정액용 펌프(21)는 표면조정액 저장탱크(19)에 저장된 표면조정액을 표면조정액 공급관(15)으로 이송함으로써, 각 공급관(15)에 설치된 스프레이 노즐(16)을 통해 표면조정액을 피도물(20)의 표면에 1~3분 동안 분사한다.The surface adjustment liquid pump 21 transfers the surface adjustment liquid stored in the surface adjustment liquid storage tank 19 to the surface adjustment liquid supply pipe 15, thereby transferring the surface adjustment liquid through the spray nozzle 16 installed in each supply pipe 15. Spray on the surface of 20) for 1-3 minutes.

상기 표면조정액은 물에 표면조정제(분말)를 혼합한 액체이고, 표면조정제는 수산을 사용한다.The surface adjusting liquid is a liquid obtained by mixing a surface adjusting agent (powder) with water, and the surface adjusting agent uses hydroxyl.

상기 표면조정액이 피도물(20)에 1~3분 동안 뿌려지면 표면조정액의 표면조정제와 피도물(20)이 화학반응을 하여 피도물(20)의 표면에서 활성점(10)의 수를 증가시킨다.When the surface adjustment liquid is sprinkled on the coated object for 1 to 3 minutes, the surface adjusting agent and the coated material 20 of the surface adjusting liquid undergo a chemical reaction to increase the number of active points 10 on the surface of the coated object 20.

이때, 상기 표면조정액을 1분 이상 피도물(20)에 분사시키는 이유는 표면조정액이 피도물(20)과 충분히 화학반응할 수 있도록 하기 위함이다.In this case, the reason why the surface adjustment liquid is sprayed on the coating 20 for at least 1 minute is to allow the surface adjustment liquid to sufficiently react with the coating 20.

만약, 상기 표면조정액을 1분 미만으로 뿌리면 표면조정액이 피도물(20)과 충분히 반응하지 못하기 때문에 피도물(20)의 표면에서 활성점(10)의 수가 증가하지 않고, 이로인해 후공정에서 화성피막의 결정(11)을 균일하고 치밀하게 하지 못하는 결과를 초래하고, 표면조정액을 3분 이상 지지나치게 많이 뿌리면 표면조정액을 낭비하여 제조비용을 상승시키는 문제점이 있기 때문에, 상기 표면조정액의 처리시간을 상기 범위내로 관리 유지하는 것이 바람직하다.If the surface adjustment liquid is sprinkled for less than one minute, the surface adjustment liquid does not sufficiently react with the object 20. Therefore, the number of active points 10 does not increase on the surface of the object 20, and therefore, the chemical conversion film in the subsequent process. This results in the inability to uniformly and precisely crystallize the crystals 11, and if the surface adjustment solution is excessively sprayed for more than three minutes, there is a problem of waste of the surface adjustment solution and an increase in manufacturing cost. It is desirable to maintain and maintain in a range.

상기 표면조정액은 피도물(20)에 분사된 후 리턴라인을 통해 표면조정액 저장탱크(19)로 순환되고, 이때 표면조정공정 이전 수세공정 단계에서 미세척된 미소량의 알카리 탈지제가 표면조정액에 혼합될 수 있다.The surface adjusting liquid is sprayed onto the coating object 20 and then circulated to the surface adjusting liquid storage tank 19 through the return line, wherein a small amount of alkali degreasing agent finely mixed in the washing process step before the surface adjusting process is mixed with the surface adjusting liquid. Can be.

여기서, 상기 오염된 표면조정액의 오염도 및 알카리도를 측정하여 관리기준범위 내로 관리 및 유지하는 것이 바람직하다.Here, it is preferable to manage and maintain the contamination degree and alkalinity of the contaminated surface adjustment liquid within the management standard range.

상기 오염도는 pH도로 나타내고, 알카리도는 포인트(point;pt)로 나타내며,이 오염도와 알카리도에 의해 표면조정액 속에 알카리 탈지제가 얼마나 오염되어 있는지 여부를 판단할 수 있다. The pollution degree is expressed in pH, the alkalinity is expressed in points (pt), and it is possible to determine how contaminated the alkali degreasing agent is contained in the surface adjustment liquid by the pollution degree and alkalinity.

이때, 상기 오염도는 pH9~11 범위내에 유지하고, 알카리도는 2.0~5.0pt 범위 내에 유지하는 것이 바람직하다.At this time, the pollution degree is preferably maintained in the pH 9 ~ 11 range, the alkalinity is preferably maintained in the 2.0 ~ 5.0pt range.

상기 오염도는 pH 센서에 의해 표면조정액 저장탱크(19)에 저장된 표면조정액의 pH값을 측정할 수 있고, 알카리도는 다음과 같은 방법에 의해 측정할 수 있다.The pollution degree can be measured by the pH sensor pH value of the surface adjustment liquid stored in the surface adjustment liquid storage tank 19, the alkalinity can be measured by the following method.

예를 들면, 먼저 25㎖ 홀 피펫(12)(holl pippet)으로 표면조정액을 정확히 채취한다.For example, first, the surface adjustment liquid is accurately collected with a 25 ml hole pippet.

그 다음, 채취된 홀 피펫(12)을 삼각 플라스크(13)에 이동시키고, 지시약 브로모페놀블루(B.P.B)용액을 2~3방울 주입한다.Then, the collected hole pipette 12 is moved to the Erlenmeyer flask 13, and 2-3 drops of the indicator bromophenol blue (B.P.B) solution are injected.

이때, 브로모페놀블루(B.P.B)B.P.B 용액이 표면조정액에 혼합되면 혼합액은 청색으로 변한다.At this time, when the bromophenol blue (B.P.B) B.P.B solution is mixed with the surface adjustment liquid, the mixed liquid turns blue.

계속해서, 적정액의 N/10-HCl을 홀 피켓으로 채취한 다음, 홀 피페을 삼각 플라스크(13)의 상단부 안쪽에 넣고 삼각플라스크(13)를 흔들면서 홀 피펫(12)에 저장된 N/10-HCl의 적정액을 서서히 주입하여 혼합한다.Subsequently, the N / 10-HCl of the titrant is collected with a hole picket, and the hole pipe is placed inside the upper end of the Erlenmeyer flask 13, and the Erlenmeyer flask 13 is shaken to store the N / 10-H stored in the hole pipette 12. Slowly inject the titration solution of HCl and mix.

이때, 혼합액의 색이 황식으로 변하면 N/10-HCl의 주입을 중단하고, 홀 피펫(12)의 눈금을 확인하여 소비된 N/10-HCl의 ㎖를 측정하고, 이 소비된 N/10-HCl의 ㎖수가 포인트(pt)가 된다.At this time, when the color of the mixed solution turns yellow, the injection of N / 10-HCl is stopped, the scale of the hole pipette 12 is checked, and the ml of N / 10-HCl consumed is measured. The number of ml of HCl is the point (pt).

여기서, 상기 표면조정액 저장탱크(19)에 저장된 표면조정액의 오염도 및 알카리도를 주기적으로 측정하고, 상기 관리기준범위를 벗어날 경우 오염된 표면조정액을 새로운 표면조정액으로 교체한다.Here, the degree of contamination and alkalinity of the surface adjustment liquid stored in the surface adjustment liquid storage tank 19 is periodically measured, and if it is out of the management standard range, the contaminated surface adjustment liquid is replaced with a new surface adjustment liquid.

따라서, 상기와 같은 방법에 의해 표면조정을 수행하면, 피도물(20)의 표면에서 피도물(20)과 표면조정제가 화학반응을 함으로써, 피도물(20)의 표면입자에 활성점(10)이 증가하고, 이로 인해 후공정인 화성피막 공정에서 활성점(10)을 핵으로 하여 결정(11)이 균일하고 치밀하게 된다.
Therefore, when the surface adjustment is performed by the above method, the active material 10 increases in the surface particles of the workpiece 20 by chemical reaction between the workpiece 20 and the surface modifier on the surface of the workpiece 20. As a result, the crystal 11 is uniform and dense with the active point 10 as the nucleus in the later chemical conversion process.

10 : 활성점 11 : 결정
12 : 홀 피펫 13 : 삼각플라스크
14 : 표면조정챔버 15 : 표면조정액 공급관
16 : 스프레이 노즐 17 : 행거
18 : 재순환라인 19 : 표면조정액 저장탱크
20 : 피도물 21 : 표면조정액 펌프10: active point 11: crystal
12: hole pipette 13: triangular flask
14 surface adjustment chamber 15 surface adjustment liquid supply pipe
16: spray nozzle 17: hanger
18: Recirculation line 19: Surface adjustment liquid storage tank
20: coating 21: surface adjustment liquid pump

Claims (4)

피도물(20)에 전착도장을 하기 전에 준비하는 공정 중 탈지 및 수세 단계 이후 화성피막 이전에 이루어지는 표면조정의 전착도장의 방법에 있어서,
피도물(20)을 표면조정챔버(14)의 내부로 이동시키는 단계;
표면조정액용 펌프(21)를 작동시키는 단계;
상기 표면조정챔버(14)의 내부에 장착된 스프레이 노즐(16)을 통해 표면조정액을 피도물(20)에 분사시키는 단계;
상기 표면조정액이 피도물(20)과 화학반응하여 피도물(20)의 표면입자를 균일하고 치밀하게 하는 단계;
수세공정에서 세척되지 않아서 피도물(20)에 잔존하는 알카리 탈지제가 표면조정공정 중 표면조정액에 오염된 정도(오염도 및 알카리도)를 주기적으로 체크함으로써, 표면조정에 의해 피막 결정의 균일성 및 치밀성을 향상시키는 단계;
를 포함하고,
상기 표면조정챔버(14)는 천정에 피도물(20)을 걸 수 있도록 내부에 장착된 행거(17)와, 상기 행거(17)에 걸려진 피도물(20)에 표면조정액을 분사하기 위해 내부에 사방(상하좌우)으로 배치된 다수의 스프레이 노즐(16)과, 상기 스프레이 노즐(16)을 연결하고 스프레이 노즐(16)에 표면조정액을 공급하기 위해 내부에 전후방향으로 일정한 간격을 두고 장착된 표면조정액 공급관(15)을 포함하며,
상기 표면조정액 공급관(15)은 표면조정액용 펌프(21)에 연결되고, 상기 표면조정챔버(14)의 저면에는 배출구가 형성되고, 이 배출구는 재순환라인에 의해 표면조정액 저장탱크(19)와 연결됨으로써, 피도물(20)에 분사된 표면조정액은 리턴라인을 통해 표면조정액 저장탱크(19)로 순환되는 것을 포함하는 것을 특징으로 하는 전착도장의 전처리방법.
In the method of electrodeposition coating of surface adjustment made before the coating film after degreasing and washing step in the process of preparing before the electrodeposition coating on the workpiece 20,
Moving the workpiece 20 into the surface adjustment chamber 14;
Operating the pump 21 for the surface adjustment liquid;
Spraying a surface adjustment liquid onto the workpiece 20 through a spray nozzle 16 mounted inside the surface adjustment chamber 14;
Making the surface adjustment liquid chemically react with the object 20 to make the surface particles of the object 20 uniform and dense;
By periodically checking the degree (contamination degree and alkalinity) of the alkali degreasing agent remaining in the coating object 20 because it is not washed in the water washing process during the surface adjustment process, the uniformity and density of the coating crystals are improved by surface adjustment. Making a step;
Including,
The surface adjustment chamber 14 has a hanger 17 mounted therein so as to hang the workpiece 20 on the ceiling, and the inside of the surface adjustment liquid to spray the surface adjustment liquid on the workpiece 20 caught by the hanger 17. A plurality of spray nozzles 16 arranged in (up, down, left, and right) and surface adjustment liquids mounted at regular intervals in the front and rear directions to connect the spray nozzles 16 and supply the surface adjustment liquids to the spray nozzles 16. A supply pipe 15,
The surface adjusting liquid supply pipe 15 is connected to the surface adjusting liquid pump 21, and an outlet is formed at the bottom of the surface adjusting chamber 14, and the outlet is connected to the surface adjusting liquid storage tank 19 by a recirculation line. By doing so, the surface adjustment liquid sprayed on the workpiece 20 is circulated to the surface adjustment liquid storage tank 19 through the return line.
삭제delete 삭제delete 청구항 1에 있어서,
상기 표면조정액용 펌프(21)는 표면조정액 저장탱크(19)에 저장된 표면조정액을 표면조정액 공급관(15)으로 이송함으로써, 각 공급관(15)에 설치된 스프레이 노즐(16)을 통해 표면조정액을 피도물(20)의 표면에 1~3분 동안 분사하는 것을 포함하는 것을 특징으로 하는 전착도장의 전처리방법.
The method according to claim 1,
The surface adjustment liquid pump 21 transfers the surface adjustment liquid stored in the surface adjustment liquid storage tank 19 to the surface adjustment liquid supply pipe 15, thereby transferring the surface adjustment liquid through the spray nozzle 16 installed in each supply pipe 15. 20) pretreatment method of electrodeposition coating, comprising spraying for 1 to 3 minutes on the surface.
KR1020100076641A 2010-08-09 2010-08-09 Method for preprocessing electropainting KR101219712B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940011067A (en) * 1992-11-24 1994-06-20 가와모토 노부히코 Electrodeposition Coating System
KR0121507Y1 (en) * 1995-12-21 1998-07-15 김태구 Structure of a supply pipe
KR20100029638A (en) * 2008-09-08 2010-03-17 주식회사 성진케미칼 Liquid surface conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940011067A (en) * 1992-11-24 1994-06-20 가와모토 노부히코 Electrodeposition Coating System
KR0121507Y1 (en) * 1995-12-21 1998-07-15 김태구 Structure of a supply pipe
KR20100029638A (en) * 2008-09-08 2010-03-17 주식회사 성진케미칼 Liquid surface conditioner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
인터넷 http://cafe.naver.com/automotivepainting1/146 *
인터넷 http://cafe.naver.com/automotivepainting1/146*

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