KR20030025066A - A method for rising adhesive power of plating film - Google Patents
A method for rising adhesive power of plating film Download PDFInfo
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- KR20030025066A KR20030025066A KR1020010057989A KR20010057989A KR20030025066A KR 20030025066 A KR20030025066 A KR 20030025066A KR 1020010057989 A KR1020010057989 A KR 1020010057989A KR 20010057989 A KR20010057989 A KR 20010057989A KR 20030025066 A KR20030025066 A KR 20030025066A
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- South Korea
- Prior art keywords
- plating
- hot dip
- alloy
- plating film
- zinc
- Prior art date
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- 238000007747 plating Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000853 adhesive Substances 0.000 title 1
- 230000001070 adhesive effect Effects 0.000 title 1
- 230000000630 rising effect Effects 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005246 galvanizing Methods 0.000 claims description 8
- 230000004907 flux Effects 0.000 claims description 4
- 238000005238 degreasing Methods 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 229910019142 PO4 Inorganic materials 0.000 abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 4
- 239000010452 phosphate Substances 0.000 abstract description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 2
- 239000008397 galvanized steel Substances 0.000 abstract description 2
- 239000002987 primer (paints) Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 11
- 229910052725 zinc Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000013535 sea water Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 206010060800 Hot flush Diseases 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Classifications
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/30—Fluxes or coverings on molten baths
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
본 발명은 도금 표면에 별도의 전처리나 특수 하지도장 없이 도막 부착력을 향상시키는 방법에 관한 것이다.The present invention relates to a method for improving coating adhesion without the need for additional pretreatment or special undercoating on the plating surface.
조선해양 분야의 해수용 강관은 용융아연도금(Galvanizing), 용융알루미늄도금(Aluminizing), PE(Polyethylene)코팅 등을 사용하여 해수중에서 내식성을 높이고 있다. 이중에서 용융 아연도금은 가격이 저렴하고 조선분야에서 널리 사용되고 있고, 용융알루미늄 및 PE 코팅의 경우, 내식성은 우수하나 상대적으로 가격이 고가이므로 제한적으로 사용하고 있다. 용융 알루미늄 도금의 경우는 물량이 불규칙하고 생산성이 낮아서 공기준수에 어려움이 많으며, PE의 경우 코팅층의 손상이 발생하지 않도록 별도로 관리해야 하므로 시공이 까다롭다.Seawater steel pipes in shipbuilding and offshore fields are using galvanizing, aluminizing, and PE (polyethylene) coatings to increase corrosion resistance in seawater. Among these, hot dip galvanizing is inexpensive and widely used in the shipbuilding field. In the case of molten aluminum and PE coating, corrosion resistance is excellent but relatively high price, so it is limitedly used. In the case of molten aluminum plating, the quantity is irregular and the productivity is low, so it is difficult to comply with the air, and in the case of PE, it is difficult to construct because it must be managed separately so as not to damage the coating layer.
해수배관의 경우 용융 알루미늄도금의 경우 약 10년, PE의 경우 20년(선박수명), 아연도금의 경우 5년 정도로 설계수명을 예상하지만 실제 아연도금 배관 수명이 2-3년 정도인 경우가 많다.In the case of seawater piping, the design life is expected to be about 10 years for molten aluminum plating, 20 years (ship life) for PE, and 5 years for zinc plating, but the actual service life of galvanized piping is often 2-3 years. .
알루미늄 도금이 아연도금보다 우수한 내식성을 나타내는 주요 원인은 알루미늄도금강의 전면부식속도가 아연도금강보다 늦기 때문이다. 따라서 아연에 알루미늄을 함유시켜 내식성을 높이고자 하는 시도가 있어왔다.The main reason that aluminum plating shows better corrosion resistance than zinc plating is that the front corrosion rate of aluminum plated steel is slower than that of galvanized steel. Therefore, there have been attempts to increase the corrosion resistance by containing aluminum in zinc.
Al-Zn 2원계 합금은 5%Al 부근에서 공정점을 나타내는 특성을 이용하여 저융점에서 작업이 가능하며 우수한 내식성을 가지는 합금도금이 시도되어 상용화된 것도 있다. 이것은 통상 갈판(Galfan)으로 부르고 있으며 5%정도의 Al과 미량의 회토류금속(La, Ce)을 함유한 Zn-5%Al 도금욕에서 도금을 실시한다. 이외에도 55%정도의 Al과 소량의 Si를 함유한 갈바륨(Galvalume)도 상용화되어 있으나 작업온도가 비교적 높다.Al-Zn binary alloys can be used at low melting points using properties that represent process points in the vicinity of 5% Al, and alloy plating with excellent corrosion resistance has been attempted and commercialized. This is usually called galfan and plating is performed in a Zn-5% Al plating bath containing 5% Al and traces of rare earth metals (La, Ce). In addition, galvalume containing 55% of Al and a small amount of Si is commercialized, but the working temperature is relatively high.
갈판의 용융 특성이 Zn과 유사하여 적용가능성이 높으나 전처리 단계에서 플럭스 고온 건조설비가 추가되어야 하며, 미도금이 자주 발생하는 외에도 해수중의 내식성 또한 검증되지 않았다.The melting characteristics of the brown plates are similar to those of Zn, which makes them highly applicable. However, flux hot-drying equipment has to be added in the pretreatment stage.
통상 용융도금후 수냉에 의해 평활한 표면을 만들고 인산염처리 또는 하지도장에 의해 상부도장 부착성을 향상시키는 방법을 사용하여 왔으나, 처리 비용이 증가되고 별도의 공정을 거쳐야 하는 문제가 있다.Normally, after the hot dip plating, a method of making a smooth surface by water cooling and improving the adhesion of the upper coating by phosphate treatment or undercoating has been used, but there is a problem in that the treatment cost is increased and a separate process is required.
본 발명은 전술한 바와 같이 도막 부착력을 높이기 위해 별도의 인산염처리나 특수 하지도장을 하지 않고 간단하게 도막 부착력을 향상시키는 방법을 제공하고자 한다.The present invention is to provide a method for simply improving the coating film adhesion without a separate phosphate treatment or special base coating to increase the coating film adhesion as described above.
본 발명은 전술한 목적을 달성하기 위하여 탈지 산세 수세 플럭스 용융아연도금 용융합금도금의 공정을 거치는 이중합금의 도금에 있어서, 상기 용융합금도금후 80~100℃의 수온을 가지는 탕세조를 설치하여 상기 탕세조에서 냉각을 실시하는 것을 특징으로 하는 이중합금 도금의 도막 부착력 향상방법을 제공한다.In the present invention, in order to achieve the above object, in the plating of a double alloy subjected to a process of degreasing pickling flush flush hot dip galvanizing hot dip plating, a hot water bath having a water temperature of 80 to 100 ° C. after the hot dip plating is installed. It provides a method for improving the coating film adhesion of the double alloy plating, characterized in that the cooling in the bath.
이하 본 발명의 구성을 상세히 설명하면 다음과 같다.Hereinafter, the configuration of the present invention in detail.
이중 합금을 하는 공정은 탈지를 거쳐 산세, 수세후 플럭스를 바른후 융점이 420℃인 아연의 용융 아연도금을 460℃정도의 온도에서 한후 수세 공정을 거치는 통상의 용융아연 도금의 공정에서, 용융아연 도금된 상태에서 아연 - 5%~15% 알루미늄 - 0~1% Si - 0~1% Mg 합금조에 침적시킨다.In the process of double alloying, in the usual hot dip galvanizing process, degreasing, pickling and washing with water, flux is applied, hot dip galvanizing of zinc having a melting point of 420 ° C is performed at a temperature of about 460 ° C, and washing with water. In the plated state, it is deposited in zinc-5%-15% aluminum-0-1% Si-0-1% Mg alloy bath.
아연 도금후 합금도금을 실시하는 공정에서 합금층의 두께 증가는 아연 도금시에만 이루어지므로 아연 도금시간을 최대한 늘려서 합금층의 두께를 적어도 20㎛ 이상으로 만든 후 합금도금을 실시한다.In the process of alloy plating after zinc plating, the thickness of the alloy layer is increased only during zinc plating. Therefore, alloy plating is performed after making the thickness of the alloy layer at least 20 μm by increasing the zinc plating time as much as possible.
바람직한 실시예는 440℃~ 500℃에서 용융아연도금 시간을 3분이상 실시후 아연 - 5%~15% 알루미늄 - 0~1% Si - 0~1% Mg 합금조에서 합금도금을 1분 실시한다.In a preferred embodiment, the hot dip galvanizing time is performed at 440 ° C. to 500 ° C. for at least 3 minutes, followed by alloy plating in a zinc bath of 5% to 15% aluminum, 0% to 1% Si, and 0% to 1% Mg. .
합금도금을 할 경우에는 알루미늄의 용융점이 660℃로 아연보다 높으므로, 이미 철과 플럭스에 의하여 도금층이 형성된 아연의 상층이 아연과 알루미늄합금 용탕의 온도에 의하여 용융되어 아연 알루미늄 합금층이 형성된다. 따라서 첨가된 용융알루미늄의 농도에 따라 다양한 용융합금 피막이 형성된다.In the case of alloy plating, since the melting point of aluminum is higher than zinc at 660 ° C., the upper layer of zinc, in which a plating layer is already formed by iron and flux, is melted by the temperature of zinc and aluminum alloy molten metal to form a zinc aluminum alloy layer. Therefore, various molten alloy films are formed according to the concentration of molten aluminum added.
이와 같이 합금도금 후에 80℃이상의 수온을 갖는 탕세조를 설치하고 냉각과정은 80℃ 이상의 수온을 갖는 탕세조에서 실시한다.Thus, after the alloy plating, a bath with water temperature of 80 ℃ or more is installed and the cooling process is carried out in a bath with water temperature of 80 ℃ or more.
80℃ 이상의 수온에서 냉각을 하면 높은 수온에 의해 냉각속도가 저하되고 수증기와의 반응으로 인해 도금표면과 도막의 부착력이 향상되므로 별도의 인산염처리나 하지 도장이 필요없다.When cooling at water temperature of 80 ℃ or higher, the cooling rate is lowered by high water temperature, and the adhesion between plating surface and coating film is improved by reaction with water vapor.
이상과 같이 본 발명은 별도의 인산염 처리나 하지도장이 필요 없으므로 공정이 줄어들고 비용이 절감되는 효과가 있다.As described above, since the present invention does not require a separate phosphate treatment or undercoating, the process is reduced and the cost is reduced.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010057989A KR20030025066A (en) | 2001-09-19 | 2001-09-19 | A method for rising adhesive power of plating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010057989A KR20030025066A (en) | 2001-09-19 | 2001-09-19 | A method for rising adhesive power of plating film |
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| Publication Number | Publication Date |
|---|---|
| KR20030025066A true KR20030025066A (en) | 2003-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020010057989A KR20030025066A (en) | 2001-09-19 | 2001-09-19 | A method for rising adhesive power of plating film |
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| Country | Link |
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| KR (1) | KR20030025066A (en) |
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2001
- 2001-09-19 KR KR1020010057989A patent/KR20030025066A/en not_active Application Discontinuation
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