KR20070023288A - One completing finish coat of polyurethane painting system after coating on hot dip galvanized radiator for transformer - Google Patents
One completing finish coat of polyurethane painting system after coating on hot dip galvanized radiator for transformer Download PDFInfo
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- KR20070023288A KR20070023288A KR1020050077708A KR20050077708A KR20070023288A KR 20070023288 A KR20070023288 A KR 20070023288A KR 1020050077708 A KR1020050077708 A KR 1020050077708A KR 20050077708 A KR20050077708 A KR 20050077708A KR 20070023288 A KR20070023288 A KR 20070023288A
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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Abstract
본 발명은 용융아연도금된 변압기용 라디에이터의 도장방법에 관한 것으로, 그 목적은 용융아연도금 피막위에 인산염 박막을 형성시켜 상도 페인트의 부착력이 매우 향상되도록 하며, 라디에이터의 도장횟수 및 두께를 줄여 방열효과를 높여주고, 도장횟수의 감소로 인한 능률향상 및 작업공정이 단축 되도록 하며, 인체에 무해한 도장재료를 사용하는 용융아연도금된 변압기용 라디에이터의 도장방법을 제공함에 있다.The present invention relates to a method of coating a radiator for hot-dip galvanized transformer, the purpose of which is to form a phosphate thin film on the hot-dip galvanized film to improve the adhesion of the top coat paint, and to reduce the number and thickness of the radiator heat radiation effect To improve the efficiency, and to improve the work process due to the reduction of the number of times of painting, and to provide a coating method of the radiator for hot-dip galvanized transformer using a coating material harmless to the human body.
상기 목적달성을 위한 본 발명은 용융아연도금된 라디에이터를 도장함에 있어서, 상기 용융아연도금된 라디에이터 내부를 바니쉬로 함침하는 바니쉬함침단계; 상기 함침된 바니쉬를 정체한 후 가열건조하는 바니쉬 가열건조단계; 상기 바니쉬건조단계의 라디에이터 외면에 도금되어 있는 아연과 반응 하도록 인산염을 피막하여 방청성의 다공질 피막층이 형성되도록 하는 인산염 피막단계; 상기 인산염 피막단계에서 형성된 방청성 다공질 피막층을 가열 건조하여 라디에이터의 다공질 피막 내에 함축되어 있는 수분을 증발시켜 상도의 부착력을 매우 뛰어나게 하는 가열건조 단계; 상기 가열건조단계의 방청성 다공질 피막층에 우레탄 상도도장을 하는 상도도장단계로 이루어진 것을 그 기술적 요지로 한다.The present invention for achieving the object is a varnish impregnation step of impregnating the inside of the hot-dip galvanized radiator with a varnish in painting the hot-dip galvanized radiator; A varnish heating and drying step of stagnating the impregnated varnish and then drying it by heating; A phosphate coating step of forming a rust-resistant porous coating layer by coating phosphate to react with zinc plated on the radiator outer surface of the varnish drying step; A heat drying step of heating and drying the rust-resistant porous film layer formed in the phosphate coating step to evaporate the moisture contained in the porous film of the radiator so as to have an excellent adhesion to the top coat; The technical gist of the coating layer is a top coating step of performing urethane top coat on the rust-preventive porous film layer of the heat drying step.
용융아연도금, 라디에이터, 도장, 인산, 우레탄 상도도장, 바니쉬 Hot dip galvanizing, radiator, painting, phosphoric acid, urethane top coating, varnish
Description
도 1 은 본 발명의 일실시예에 의한 도장방법을 나타낸 공정도, 1 is a process chart showing a coating method according to an embodiment of the present invention,
본 발명은 용융아연도금된 변압기용 라디에이터의 도장방법에 관한 것으로, 아연도금된 라디에이터에 인산염을 피막한후 도장함에 따라 도막두께를 줄여 라디에이터의 방열효과를 높여주며, 도장공정을 생략하여 작업시간을 단축해주는 용융아연도금된 변압기용 라디에이터의 도장방법에 관한 것이다.The present invention relates to a method of coating a radiator for a hot-dip galvanized transformer, by coating a phosphate film on a galvanized radiator, thereby reducing the thickness of the coating to increase the heat dissipation effect of the radiator, eliminating the painting process to reduce the working time The present invention relates to a method of painting a radiator for a hot-dip galvanized transformer which shortens.
통상 라디에이터의 용융아연도금은 그 자체만으로도 방청성이 매우 우수함으로 크롬산으로 봉공(SEALING)시켜 제품으로 사용해 오고 있으나, 고객의 특별한 요구로 변압기 탱크와 동일한 색상으로 도장해야 하는 경우, 용융아연도금표면위에 비철금속의 전처리용 프라이머를 도장하고, 다시 에폭시 페인트로 도장하며, 다시 우레탄 상도페인트로 도장함으로써 완성된다.In general, hot dip galvanizing of radiators has been used as a product by sealing with chromic acid because of its excellent anti-corrosion property, but when it is required to be painted in the same color as the transformer tank according to the customer's special request, the non-ferrous metal on the surface of hot dip galvanizing It is completed by coating the primer for pretreatment of, coating with epoxy paint and coating with urethane top paint again.
그러나 상기와 같이 전처리용 프라이머, 에폭시 페인트, 우레탄 페인트를 도장할 경우 3겹으로 도장을 하기 때문에 도장두께가 두꺼워져 라디에이터의 방열효과가 줄어드는 문제점이 있으며, 또한 여러겹의 도장을 수행함으로써 작업능률이 매우 떨어지며 도장비용이 많이 들게 되는 문제점이 있다.However, when the primer for pre-treatment, epoxy paint, urethane paint, as described above, the three-layer coating, the coating thickness is thick, there is a problem that the heat dissipation effect of the radiator is reduced, and also the work efficiency is improved by performing a plurality of coating There is a problem that is very falling and the cost of painting.
즉, 불필요하게 복잡한 도장 사양이 적용되어 과다한 공수가 투입될 뿐만 아니라 도료의 손실량도 많아 생산성이 매우 저조하였다In other words, unnecessarily complicated paint specifications are applied, not only excessive air is input but also the loss of paint is very low, resulting in very low productivity.
또한 상기 전처리용 프라이머의 국방색 내에는 인체에 매우 해로운 6가 크롬(ZnCrO4)이 함유되어 있는 문제점이 있다.In addition, there is a problem that hexavalent chromium (ZnCrO 4 ) is contained in the defense color of the primer for pretreatment, which is very harmful to the human body.
본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출되는 것으로, 용융아연도금 피막위에 인산염 피막을 형성시켜 상도 페인트의 부착력이 매우 향상되도록 하며, 라디에이터의 도장횟수 및 두께를 줄여 방열효과를 높여주고, 도장횟수의 감소로 인한 능률향상 및 작업공정이 단축되도록 하며, 인체에 무해한 도장재료를 사용하는 용융아연도금된 변압기용 라디에이터의 도장방법을 제공함을 목적으로 한다.The present invention is created to solve the conventional problems as described above, by forming a phosphate film on the hot-dip galvanized film to improve the adhesion of the top coat paint very much, reducing the number and thickness of the radiator to increase the heat dissipation effect To improve the efficiency and work process due to the reduction of the number of painting, and to provide a coating method of the radiator for hot-dip galvanized transformer using the coating material harmless to the human body.
상기 목적을 달성하기 위한 본 발명은 용융아연도금된 라디에이터를 도장함에 있어서, 용융아연도금된 라디에이터를 도장함에 있어서, 용융아연도금된 라디에이터 내부의 이물질 제거 및 공기를 이용한 청소단계; 상기 청소단계의 용융아연도금된 라디에이터 내부를 바니쉬로 함침하는 바니쉬함침단계; 상기 함침된 바니쉬를 정체한 후 가열건조하는 바니쉬가열건조단계; 상기 바니쉬건조단계의 라디에이터 외면에 도금되어 있는 아연과 반응하도록 인산염을 피막하여 방청성 다공질 피막층이 형성되도록 하는 인산염 피막단계;상기 인산염 피막단계에서 형성된 방청성 다공질 피막층을 가열 건조하여 라디에이터의 외면에 함축되어 있는 수분을 제거시켜 상도 부착력을 향상 시키는 가열건조단계; 상기 가열건조단계의 방청성 다공질 피막층에 우레탄 상도도장을 하는 상도도장단계로 이루어진 것을 특징으로 한다.The present invention for achieving the above object in the coating of the hot-dip galvanized radiator, in the coating of the hot-dip galvanized radiator, removing foreign matter inside the hot-dip galvanized radiator and cleaning step using air; A varnish impregnation step of impregnating the inside of the hot dip galvanized radiator of the cleaning step with a varnish; A varnish heating drying step of stagnating the impregnated varnish and then heating and drying it; A phosphate coating step of forming a rust-resistant porous coating layer by forming a phosphate coating to react with zinc plated on the radiator outer surface of the varnish drying step; A heat drying step of removing moisture to improve the top coat adhesion; It is characterized by consisting of a top coat step of performing a urethane top coat on the rust-proof porous coating layer of the heat drying step.
이하 본 발명의 실시예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.Hereinafter, the configuration and the operation of the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1 은 본 발명의 일실시예에 의한 도장방법을 나타낸 예시도로서, 본 발명은 용융아연도금된 라디에이터 내부의 이물질 제거 및 공기를 이용한 청소를 하고, 상기 라디에이터의 내부를 바니쉬로 함침시켜 정체한 후 가열하여 바니쉬를 건조하며, 상기 건조된 라디에이터의 외부면을 인산염으로 피막처리한 다음 가열하여 건조하고, 상기 인산염에 피막처리된 라디에이터에 우레탄 상도도장을 수행함으로써 용융아연도금된 라디에이터의 도장이 완료된다.1 is an exemplary view showing a coating method according to an embodiment of the present invention, the present invention is to remove the foreign matter inside the hot-dip galvanized radiator and to clean using air, impregnated the inside of the radiator with a varnish stagnated After heating, the varnish is dried, and the outer surface of the dried radiator is coated with phosphate, then heated and dried, and the coating of the hot-dip galvanized radiator is completed by performing a urethane top coat on the radiator coated with the phosphate. do.
또한 상기 우레탄 상도도장이 완료된 라디에이터의 도장상태를 다시 검사하여 도장상태에 문제점이 발생하면 수정도장을 수행함으로써 도장을 완료한다.In addition, the coating state of the radiator, the urethane top coat is completed again, if a problem occurs in the coating state is completed by performing a modified coating.
상기와 같이 라디에이터 내부를 바니쉬로 함침함으로써 용융아연도금 작업시 라디에이터 내부에 발생된 철산화물류를 굳혀서 유동하지 못하도록 한다.As described above, the inside of the radiator is impregnated with varnish to prevent the iron oxides generated in the radiator from hardening and flowing, during the hot dip galvanizing operation.
한편 상기 용융아연도금된 라디에이터의 외면에 인산염을 피막처리할 경우, Meanwhile, when phosphate is coated on the outer surface of the hot dip galvanized radiator,
상기 인산염은 도금되어 있는 아연과 화학반응을 일으켜 방청성 다공질 피막을 형성하게 된다. 이를 화학 반응식을 통해 알아보면 다음과 같다.The phosphate chemically reacts with the plated zinc to form an antirust porous coating. The chemical reaction is as follows.
식1. Zn + 2H3PO4 → Zn(H2PO4)2 + H2↑ 제1인산염(가용성)Equation 1. Zn + 2H 3 PO 4 → Zn (H 2 PO 4 ) 2 + H 2 ↑ Monophosphate (soluble)
식2. Zn(H2PO4)2 → ZnHPO4 + H3PO4 제2인산염(난용성)Equation 2. Zn (H 2 PO 4 ) 2 → ZnHPO 4 + H 3 PO 4 Diphosphate (solubility)
식3. 3ZnHPO4 → Zn3(PO4)2 + H3PO4 제3인산염(난용성)Equation 3. 3ZnHPO 4 → Zn 3 (PO 4 ) 2 + H 3 PO 4 Triphosphate (poorly soluble)
상기와 같이 인산염을 라디에이터의 아연표면에 피막처리하게 되면, 인산염이 식1과 같이 상기 아연표면을 에칭시켜 수소가스를 발생시키게 되고, 이렇게 수소가스가 발생되면 수소이온 농도는 저하되면서 평행이 깨어지게 되어 식2와 식3과 같은 반응으로 진행된다. 이때 상기 식3의 제3인산염은 처음에는 겔상태로 솜털처럼 금속표면에 침착하고 이것이 생장하여 결정화 하여 금속면, 즉 라디에이터의 외면을 둘러싸게 되어 방청성 다공질 피막을 형성하게 된다.When the phosphate is coated on the zinc surface of the radiator as described above, the phosphate etches the zinc surface as shown in Equation 1 to generate hydrogen gas. When the hydrogen gas is generated, the hydrogen ion concentration decreases and parallelism is broken. The reaction proceeds in the same manner as in Equation 2 and Equation 3. At this time, the triphosphate of Formula 3 is first deposited on the metal surface like a fluffy in a gel state, and it grows and crystallizes to surround the metal surface, that is, the outer surface of the radiator, to form an rust-proof porous film.
이와 같이 인산염이 피막처리 되어 있으므로 하도를 생략하여도 상도의 부착력이 매우 높아지게 된다.In this way, since the phosphate is coated, the adhesion of the top coat becomes very high even if the bottom coat is omitted.
상기 우레탄 상도도장은 먼저 라디에이터의 한면을 상도 도장하고, 열을 가하여 강제건조 시킨 후 뒤집어 나머지 다른 한 면을 상도도장 하여 강제건조 시킴으로써 완료되며, 상기 강제건조시의 온도는 60℃ 정도로 하는 것이 바람직하다.The urethane top coat is completed by first coating one side of the radiator, forcing it to dry by applying heat, then turning it over and forcing the other side to top coat for the other side, and the temperature of the forced drying is preferably about 60 ° C. .
상기와 같이 60℃ 정도의 온도로 상도도장을 강제건조 함에 따라 도장불량이 없이 건조시간을 단축시킬 수 있어 작업능률향상 및 납품기한을 단축하게 된다.As described above, by forcibly drying the top coat at a temperature of about 60 ° C., the drying time can be shortened without coating defects, thereby improving work efficiency and shortening delivery time.
또한 우레탄 상도도장을 수행함으로써 도막의 수명 연장 및 외관상태를 미려하게 하며, 내후성 및 방수기능을 향상시킨다.In addition, by performing a urethane top coat, it is possible to extend the life and appearance of the coating film and improve weather resistance and waterproof function.
한편 상기 인산염 피막처리 후 가열건조시의 온도는 80℃~100℃ 정도로 유지하는 것이 바람직하다. 이는 다공질의 피막속에 잔존하고 있는 수분을 증발시켜 도장시 페인트의 부착력을 매우 좋도록 하기 위함이다.On the other hand, it is preferable to maintain the temperature at the time of heat drying after the said phosphate coating process about 80 to 100 degreeC. This is to evaporate the moisture remaining in the porous film so as to improve the adhesion of the paint during coating.
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.
상기와 같은 구성 및 작용에 의해 기대할 수 있는 본 발명의 효과는, 용융아연도금 피막위에 인산염 피막을 형성시켜 상도 페인트의 부착력이 매우 향상되도록 하여 상도 페인트의 도장이 용이하도록 하고, 도막의 두께를 줄여줌에 따라 라디에 이터의 도장횟수 및 두께를 줄여 방열효과를 높여주고, 도장횟수의 감소로 인한 능률향상 및 작업공정이 단축되도록 하며, 인체에 무해한 도장재료를 사용함으로써 작업자의 건강을 해치지 않는 매우 유용한 발명이다.The effect of the present invention can be expected by the configuration and action as described above, to form a phosphate film on the hot-dip galvanized film to improve the adhesion of the top coat paint to facilitate the coating of the top coat paint, reducing the thickness of the coating film As the zoom reduces the number and thickness of the radiator, it improves the heat dissipation effect, improves efficiency and shortens the work process due to the reduction of the number of paintings, and uses a material that is harmless to the human body. It is a useful invention.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050077708A KR20070023288A (en) | 2005-08-24 | 2005-08-24 | One completing finish coat of polyurethane painting system after coating on hot dip galvanized radiator for transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050077708A KR20070023288A (en) | 2005-08-24 | 2005-08-24 | One completing finish coat of polyurethane painting system after coating on hot dip galvanized radiator for transformer |
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| KR20070023288A true KR20070023288A (en) | 2007-02-28 |
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| KR1020050077708A KR20070023288A (en) | 2005-08-24 | 2005-08-24 | One completing finish coat of polyurethane painting system after coating on hot dip galvanized radiator for transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101055814B1 (en) * | 2006-09-26 | 2011-08-09 | 현대중공업 주식회사 | Radiator coating method for transformer |
| KR101347365B1 (en) * | 2009-12-15 | 2014-01-03 | 현대중공업 주식회사 | Improvement of hot dip galvanized radiator’s internal paint for sticking of alien substances |
-
2005
- 2005-08-24 KR KR1020050077708A patent/KR20070023288A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101055814B1 (en) * | 2006-09-26 | 2011-08-09 | 현대중공업 주식회사 | Radiator coating method for transformer |
| KR101347365B1 (en) * | 2009-12-15 | 2014-01-03 | 현대중공업 주식회사 | Improvement of hot dip galvanized radiator’s internal paint for sticking of alien substances |
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