KR20010073455A - Shop Primer for Steel - Google Patents

Shop Primer for Steel Download PDF

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Publication number
KR20010073455A
KR20010073455A KR1020000001850A KR20000001850A KR20010073455A KR 20010073455 A KR20010073455 A KR 20010073455A KR 1020000001850 A KR1020000001850 A KR 1020000001850A KR 20000001850 A KR20000001850 A KR 20000001850A KR 20010073455 A KR20010073455 A KR 20010073455A
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KR
South Korea
Prior art keywords
steel
pretreatment
welding
thinner
parts
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KR1020000001850A
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Korean (ko)
Inventor
최우현
정문섭
Original Assignee
송영수
주식회사 한진중공업
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Priority to KR1020000001850A priority Critical patent/KR20010073455A/en
Publication of KR20010073455A publication Critical patent/KR20010073455A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/02—Polysilicates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0893—Zinc

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Arc Welding In General (AREA)

Abstract

PURPOSE: Paints for pretreating steel is provided, to reduce the welding defect such as a pit or a blow hole in high speed welding. CONSTITUTION: The paints comprises 60 parts by volume of a mixture which consists of 70 parts by weight of a base material and 30 parts by weight of a curing agent; and 40 parts by volume of a thinner. Preferably the base material is ethyl silicate and zinc powder.

Description

강재용 전처리 도장제 {Shop Primer for Steel}Pretreatment paint for steel {Shop Primer for Steel}

본 발명은 강재용 전처리 도장제에 관한 것으로서, 특히 고속용접에 의해 용접부위에 피트(pit)나 블로우 홀(blow hole) 등의 용접결함이 발생하는 것을 현저하게 줄일 수 있는 강재용 전처리 도장제에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to steel pretreatment paints, and more particularly, to steel pretreatment paints that can significantly reduce the occurrence of welding defects, such as pits and blow holes, in welded portions due to high speed welding.

일반적으로, 선박건조 등에 사용되는 강재(철판)는, 저장, 가공, 조립을 거쳐 도장작업에 임하기 전까지 강재표면이 부식되는 것을 방지하기 위하여 입고후 전처리 공정을 거치게 된다.In general, steel (steel plate) used in shipbuilding, etc., is subjected to a pretreatment process after receipt in order to prevent corrosion of the steel surface until the painting work through storage, processing, assembly.

종래에는 이렇게 전처리된 강재에 대하여 용접속도가 낮은 중력용접이나 자동접촉식 용접을 주로 적용하였다. 따라서, 용융금속의 응고속도가 상대적으로 느려 용접하는 동안 전처리 도장제가 연소하면서 발생된 가스가 용착금속 밖으로, 즉 대기로 방출될 수 있는 시간적 여유가 충분하여 용접결함이 발생하지 않았다.Conventionally, gravity welding or automatic contact welding with a low welding speed is mainly applied to the pretreated steel. Therefore, the solidification rate of the molten metal is relatively low, so that the welding defect does not occur because there is enough time for the gas generated while the pretreatment paint is burned during welding during the welding to be released out of the deposited metal, that is, into the atmosphere.

그러나, 최근에는 용접공정의 원가를 절감하기 위하여, 전처리된 강재에 대하여 고속용접기법을 적용하는 추세에 있다. 그런데, 전처리된 강재에 대하여 고속용접기법을 적용하게 되면, 용접하는 동안 전처리 도장제가 연소하면서 발생된 가스가 용착금속 밖으로, 즉 대기로 방출할 수 있는 시간적 여유가 불충분하여 용접부위에 다량의 피트나 블로우 홀 등의 결함이 발생하게 되고, 따라서 용접부위의 품질이 저하되는 문제가 있다.However, in recent years, in order to reduce the cost of the welding process, there is a tendency to apply a high speed welding method to pretreated steel. However, if the high-speed welding technique is applied to the pretreated steel, there is insufficient time for the gas generated while the pretreatment paint is burned during welding to release to the outside of the weld metal, i.e., to the atmosphere. There arises a problem that defects such as holes are generated, and thus the quality of the welded portion is degraded.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 고속용접에 의해 발생되는 용접결함을 줄일 수 있는 강재용 전처리 도장제를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, and an object of the present invention is to provide a pretreatment coating material for steel that can reduce the welding defect caused by high-speed welding.

이러한 목적을 달성하기 위한 본 발명의 강재용 전처리 도장제는 주제와 경화제와 신너가 혼합된 것으로서, 상기 주제와 상기 경화제가 혼합된 혼합제는 그 혼합비가 중량비 7:3이며, 상기 혼합제와 상기 신너의 혼합비는 부피비 6:4이다.In order to achieve the above object, the pretreatment paint for steel materials of the present invention is a mixture of a main material, a curing agent, and a thinner, and a mixing ratio of the main material and the curing agent is a weight ratio of 7: 3, and a mixing ratio of the mixture and the thinner. Is 6: 4 by volume.

여기에서, 상기 주제는 에틸 실리케이트(Ethyl Silicate)와 아연 분말인 것을 특징으로 한다.Here, the subject is characterized in that the ethyl silicate (Ethyl Silicate) and zinc powder.

이와 같은 본 발명의 강재용 전처리 도장제는 신너의 혼합비율이 상대적으로 높기 때문에, 고속용접하는 동안 전처리 도장제가 연소하면서 발생되는 가스의 양을 감소시킬 수 있다. 따라서, 용접부위에 피트나 브로우 홀 등의 용접결함이 발생하는 것을 현저하게 줄일 수 있고, 결과적으로 용접부위의 품질저하를 방지할 수 있다.Since the mixing ratio of the thinner of the steel pretreatment coating agent of the present invention is relatively high, it is possible to reduce the amount of gas generated while the pretreatment paint is burned during high speed welding. Therefore, it is possible to significantly reduce the occurrence of welding defects such as pits and brow holes in the welded portion, and as a result, the deterioration of the welded portion can be prevented.

이하, 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail.

일반적으로, 전처리 공정은 강재 표면에 부착된 밀 스케일(mill scale)이나 녹 또는 기름 등의 이물질을 샷 블라스트(shot blast)나 샌드 블라스트(sand blast)를 이용하여 제거한 후, 전처리 도장제를 도포·건조시키는 과정으로 이루어진다.In general, the pretreatment process removes foreign matter such as mill scale, rust or oil from the surface of the steel using shot blast or sand blast, and then applies a pretreatment paint. Drying process.

그런데, 당업자에게 알려진 바와 같이 전처리 도장제를 구성하는 성분들의 혼합비율에 따라 전처리 도장제의 특성이 달라진다. 예를 들어, 원하는 방청효과를 얻을 수 있는 적정 혼합비율보다 신너나 경화제를 적게 혼합하게 되면, 상대적으로 주제의 혼합비율이 상승하여 도막의 두께가 두꺼워지기 때문에 방청효과는 상승되지만 전처리 도장제가 굳는 시간은 길어지며, 반대의 경우에는 굳는 시간은 짧아지는 반면에 방청효과가 떨어진다. 따라서, 주제와 경화제 및 신너는 원하는 방청효과를 얻을 수 있는 적정한 비율로 혼합하여야만 한다.However, as is known to those skilled in the art, the properties of the pretreatment paint vary according to the mixing ratio of the components constituting the pretreatment paint. For example, when the thinner or hardener is mixed less than the proper mixing ratio to obtain the desired anti-corrosion effect, the mixing ratio of the main material is increased and the thickness of the coating film becomes thick, so that the anti-rust effect is increased but the time of pretreatment coating is hardened. Is longer, and in the opposite case, the hardening time is shorter while the rust prevention effect is lower. Therefore, the main agent, the hardener and the thinner must be mixed in an appropriate ratio to obtain the desired antirust effect.

본 발명에 따른 전처리 도장제는 적당한 비율로 혼합된 주제와 경화제 및 신너로 이루어진다. 본 발명에 있어서, 원하는 방청효과를 얻기 위한 도막의 두께는 대략 15㎛정도이다. 이를 고려하면, 주제와 경화제가 혼합된 혼합제의 혼합비는 중량비 7:3인 것이 바람직하며, 이 혼합제와 신너의 희석비는 부피비 6:4인 것이 바람직하다. 여기에서, 주제는 에틸 실리케이트(Ethyl Silicate; C8H20O4Si) 용액과 아연분말이다.The pretreatment paint according to the invention consists of a main mixed with a suitable proportion, a hardener and thinner. In the present invention, the thickness of the coating film for obtaining the desired antirust effect is about 15 µm. In consideration of this, it is preferable that the mixing ratio of the mixing agent mixed with the main agent and the curing agent is 7: 3 by weight, and the dilution ratio of the mixing agent and thinner is 6: 4 by volume. Here, the subject is ethyl silicate (C 8 H 20 O 4 Si) solution and zinc powder.

본 출원인은, 샷 블라스트 공정(직경 1mm인 강철볼을 사용)을 거쳐 밀 스케일이나 기타 이물질이 제거된 철판에 상기와 같은 비율로 혼합된 전처리 도장제를 도포·건조시킨 후, 철판에 도포된 전처리 도장제의 도막두께를 측정하였다. 철판의 전면에 걸쳐 측정된 도막의 두께는 20∼70㎛로서, 원하는 방청효과를 얻기 위한 도막의 두께인 15㎛보다 모두 크다는 것을 확인하였다. 따라서, 본 발명의 혼합비율에 따라 혼합된 전처리 도장제의 경우 방청효과에는 문제가 없다는 것을 알 수 있었다. 한편, 본 발명에 따른 전처리 도장제의 건조시간은 종래의 전처리 도장제의 건조시간과 대략 동일하게 10분 정도 걸렸다.Applicant applied and dried the pretreatment coating agent mixed in the above ratio to the iron plate from which mill scale or other foreign substances were removed through a shot blasting process (using a steel ball having a diameter of 1 mm), and then the pretreatment applied to the iron plate. The coating film thickness of the coating agent was measured. The thickness of the coating film measured over the whole surface of the iron plate was 20-70 micrometers, and it confirmed that all were larger than 15 micrometers which is the thickness of the coating film for obtaining a desired antirust effect. Therefore, it was found that there is no problem in the rust prevention effect in the case of the pretreatment paint mixed according to the mixing ratio of the present invention. On the other hand, the drying time of the pretreatment coating agent according to the present invention took about 10 minutes approximately the same as the drying time of the conventional pretreatment coating agent.

또한, 본 출원인은 상기와 같이 본 발명의 바람직한 실시예에 따라 전처리된 철판에 고속용접을 실시한 후, 용접부위에 피트나 블로우 홀 등의 용접결함이 발생하는지를 알아본 결과, 용접부위에 용접결함이 거의 발생하지 않는 것을 확인하였다. 이는 본 발명의 바람직한 실시예의 혼합비에 따라 혼합된 전처리 도장제에는 신너가 상대적으로 많이 포함되어 있으므로, 고속으로 용접하는 동안 전처리 도장제가 연소하면서 발생된 가스(즉, 아연증기와 수소)의 양이 현저하게 감소되었기 때문인 것으로 추정된다.In addition, the present applicant, after performing a high-speed welding on the pre-treated steel sheet according to a preferred embodiment of the present invention as described above, as a result of finding out whether a welding defect such as a pit or a blow hole occurs in the welding site, almost no welding defect occurs in the welding site It was confirmed that not. This is because the pretreatment paint mixed according to the mixing ratio of the preferred embodiment of the present invention contains a relatively large amount of thinner, so that the amount of gas (ie, zinc vapor and hydrogen) generated while the pretreatment paint is burned during high-speed welding is remarkable. It is presumably due to the decrease.

이상 기술한 바와 같이, 본 발명에 따른 강재용 전처리 도장제는 방청효과를 유지하면서도, 고속용접에 의해 용접부위에 피트나 블로우 홀 등의 용접결함이 발생하는 것을 현저하게 줄일 수 있고, 결과적으로 용접부위의 품질저하를 방지할 수 있다.As described above, the pretreatment paint for steel according to the present invention can significantly reduce the occurrence of welding defects such as pits and blow holes in the welded portion by high-speed welding while maintaining the rust preventing effect. The deterioration can be prevented.

Claims (2)

주제와 경화제와 신너가 혼합된 강재용 전처리 도장제에 있어서,In the pretreatment paint for steel materials in which the main material, the hardener and the thinner are mixed, 상기 주제와 상기 경화제가 혼합된 혼합제는 그 혼합비가 중량비 7:3이며, 상기 혼합제와 상기 신너의 혼합비는 부피비 6:4인 것을 특징으로 하는 강재용 전처리 도장제.The mixing agent of the main material and the curing agent is mixed, the mixing ratio is 7: 3 by weight, and the mixing ratio of the mixture and the thinner is 6: 4 by volume, characterized in that the steel. 제1항에 있어서, 상기 주제는 에틸 실리케이트(Ethyl Silicate)와 아연 분말인 것을 특징으로 하는 강재용 전처리 도장제.2. The pretreatment coating for steel materials according to claim 1, wherein the main subject is ethyl silicate and zinc powder.
KR1020000001850A 2000-01-15 2000-01-15 Shop Primer for Steel KR20010073455A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122556A (en) * 1982-12-28 1984-07-16 Hitachi Zosen Corp Inorganic corrosion-protection paint
JPS61204283A (en) * 1985-03-08 1986-09-10 Kansai Paint Co Ltd Coating composition containing inorganic zinc
JPS6438482A (en) * 1987-08-03 1989-02-08 Teikoku Kako Co Ltd Rust-preventive coating composition
JPH09263714A (en) * 1996-03-29 1997-10-07 Kansai Paint Co Ltd Primary anticorrosive coating material for steel product

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122556A (en) * 1982-12-28 1984-07-16 Hitachi Zosen Corp Inorganic corrosion-protection paint
JPS61204283A (en) * 1985-03-08 1986-09-10 Kansai Paint Co Ltd Coating composition containing inorganic zinc
JPS6438482A (en) * 1987-08-03 1989-02-08 Teikoku Kako Co Ltd Rust-preventive coating composition
JPH09263714A (en) * 1996-03-29 1997-10-07 Kansai Paint Co Ltd Primary anticorrosive coating material for steel product

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