KR102130531B1 - Method for manufacturing colored Zn-Mg-Al coated steel sheet using CGL - Google Patents
Method for manufacturing colored Zn-Mg-Al coated steel sheet using CGL Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910003023 Mg-Al Inorganic materials 0.000 title description 3
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 15
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- 239000011777 magnesium Substances 0.000 claims abstract description 14
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- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
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- 229940117975 chromium trioxide Drugs 0.000 claims abstract description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 7
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- 125000000129 anionic group Chemical group 0.000 claims abstract description 7
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- 229910001297 Zn alloy Inorganic materials 0.000 abstract description 10
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- 239000005453 ketone based solvent Substances 0.000 description 1
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical compound [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 1
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- 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
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- 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
- C23C2/265—After-treatment by applying solid particles to the molten coating
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- 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
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- 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
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- 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
- B05D7/14—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 to metal, e.g. car bodies
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- 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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
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- 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
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Abstract
CGL 공정을 이용하는 착색 도금강판 제조방법이 제공된다.
본 발명의 착색 도금강판 제조방법은, CGL(Continuous Galvanized Line) 공정에서, 소지강판을, 욕 온도가 440~465℃이고, 중량%로 Al: 1.1~1.7%, Mg: 1.1 ~1.7%, Zn: 96.6~97.8% 및 불순물을 포함하는 마그네슘이 함유된 용융아연도금욕에 연속적으로 침지한 후 건조함으로써 용융아연 도금강판을 제조하는 공정; 그리고 상기 CGL 공정의 후단에 후처리 장치인 착색 도장장치를 설치하여, 상기 제조된 용융아연합금 도금강판 표면에, 중량%로, Si화합물 0.5~5%, 수용성 음이온 우레탄-아크릴 공중합체 수지 48~58%, 크롬 환원제 0.3~5%, Chromium trioxide 0.2~5%, 불소변성 PE계 왁스 1~5%, 안료 1~10% 및 잔부 물을 포함하는 착색 도장용액을 코팅한 후 건조함으로써 착색 도장층을 형성하는 공정;을 포함한다. A method of manufacturing a colored plated steel sheet using a CGL process is provided.
The colored plated steel sheet manufacturing method of the present invention, in the CGL (Continuous Galvanized Line) process, the holding steel sheet, the bath temperature is 440 ~ 465 ℃, Al: 1.1 ~ 1.7% by weight, Mg: 1.1 ~ 1.7%, Zn : Process for manufacturing a hot-dip galvanized steel sheet by continuously immersing in a hot dip galvanizing bath containing magnesium containing 96.6 to 97.8% and impurities, followed by drying; In addition, a colored coating device, which is a post-treatment device, was installed at the rear end of the CGL process, and, on the surface of the prepared hot-dip zinc alloy plated steel sheet, by weight, 0.5 to 5% of Si compound, 48 to soluble anionic urethane-acrylic copolymer resin 58%, chromium reducing agent 0.3~5%, Chromium trioxide 0.2~5%, fluorine-modified PE-based wax 1~5%, pigment 1~10%, and the color coating solution containing the remaining water and then dried to coat the color coating layer It includes; the process of forming a.
Description
본 발명은 색상이 부여된 착색 용융아연(Zn-Mg-Al)도금강판 제조방법에 관한 것으로, 보다 상세하게는, 고내식 용융아연도금강판 상부에 색상을 부여함과 동시에 고내식성을 부여하여 저가형 단색 PCM(Pre Coated Metal)강판과 같은 효과를 부여할 수 있는 CGL 공정을 이용한 착색 도금강판 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a colored hot-dip zinc (Zn-Mg-Al) plated steel sheet to which color is applied, and more specifically, a low-cost type by imparting high corrosion resistance while simultaneously applying color to the top of a high-corrosion hot-dip galvanized steel sheet. It relates to a method for manufacturing a colored plated steel sheet using a CGL process that can give the same effect as a single color PCM (Pre Coated Metal) steel sheet.
일반적으로 도금강판은 은백색의 메탈감이 있다. 하지만 내식성 강화 및 디자인을 부여하여 외관을 아릅답게 하기 위해 컬러도장을 하여 샌드위치 판넬 등 다양한 건재용도로 사용해 왔다. 그러나 상기 컬러 PCM 강판의 경우, 용융도금강판 생산 후 CCL(Color Coated Line) 공정을 거쳐 제조되어 공정비용이 상승하는 문제가 있다. In general, the plated steel sheet has a silver-white metallic feel. However, it has been used for various building materials such as sandwich panels by applying color coating to enhance the corrosion resistance and give the design a beautiful appearance. However, in the case of the color PCM steel sheet, there is a problem in that the process cost is increased because it is manufactured through CCL (Color Coated Line) process after production of hot-dip galvanized steel sheet.
한편 CGL(Continous Galvanized Line)의 후단에는 소지 철에 Zn, Al 등 용융금속을 도금하고, 이어, 도금된 강판을 냉각한후 후처리 코팅을 통해 임시방청성 및 윤활성등 기능을 부여하는 후처리 코팅설비를 두고 있다. 하지만 CGL의 후처리는 투명하여 도금강판의 메탈감이 그대로 드러난다.On the other hand, after the CGL (Continous Galvanized Line), post-processing coating equipment that gives zinc rust, lubricity, etc. through post-treatment coating after plating the molten metal such as Zn, Al on the iron in the base. Is putting. However, the post-processing of CGL is transparent, so the metal feeling of the plated steel sheet is revealed.
또한 CCL의 경우 색상 및 물성을 구현하기 위해 도막두께가 두껍고, 건조온도가 높으며, 라인스피드가 CGL대비 느리다. 더욱이 상기 PCM 강판은 상도, 중도, 하도 등 여러 구조로 이루어져 있어 2~4 번의 코팅과 건조를 반복하는 점에서 CGL설비와 큰 차이가 있어 CGL의 후단 즉, 후처리 설비로 PCM 강판처럼 색상, 물성을 구현하는 것은 매우 어렵다. In addition, in the case of CCL, in order to realize color and physical properties, the film thickness is thick, the drying temperature is high, and the line speed is slower than that of CGL. Moreover, the PCM steel sheet is composed of several structures such as top, middle, and bottom, so it has a big difference from the CGL facility in that it repeats coating and drying 2~4 times. It is very difficult to implement.
따라서 본 발명은 Zn-Mg-Al 삼원계 고내식 도금강판 제조 이후 CCL공정을 이용하여 착색 도장강판을 제조하는 종래기술과는 달리, CGL의 후처리 설비 및 후처리용액을 이용하여 색상을 부여할 수 있는 CGL 공정을 이용한 착색도금강판 제조방법을 제공함을 그 목적으로 한다. Therefore, the present invention, unlike the prior art of producing a colored coated steel sheet using a CCL process after the manufacture of Zn-Mg-Al ternary high corrosion-resistant plated steel sheet, imparts color using CGL's post-treatment equipment and post-treatment solution. It is an object of the present invention to provide a method for manufacturing a colored plated steel sheet using a CGL process.
또한 본 발명에서 이루고자 하는 기술적 과제들은 이상에서 언급한 기술적 과제들에 한정되지 않으며, 언급하지 않은 또 다른 기술적 과제들은 아래의 기재로부터 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명확하게 이해될 수 있을 것이다.In addition, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. It could be.
상기 목적을 달성하기 위한 본 발명은, The present invention for achieving the above object,
CGL(Continuous Galvanized Line) 공정에서, 소지강판을, 욕 온도가 440~465℃이고, 중량%로 Al: 1.1~1.7%, Mg: 1.1 ~1.7%, Zn: 96.6~97.8% 및 불순물을 포함하는 마그네슘이 함유된 용융아연도금욕에 연속적으로 침지한 후 건조함으로써 용융아연 도금강판을 제조하는 공정; 그리고In the CGL (Continuous Galvanized Line) process, the steel sheet, the bath temperature is 440 ~ 465 ℃, by weight Al: 1.1 ~ 1.7%, Mg: 1.1 ~ 1.7%, Zn: 96.6 ~ 97.8% and containing impurities A process of manufacturing a hot-dip galvanized steel sheet by continuously immersing in a hot-dip galvanizing bath containing magnesium and then drying; And
상기 CGL 공정의 후단에 후처리 장치인 착색 도장장치를 설치하여, 상기 제조된 용융아연합금 도금강판 표면에, 중량%로, Si화합물 0.5~5%, 수용성 음이온 우레탄-아크릴 공중합체 수지 48~58%, 크롬 환원제 0.3~5%, Chromium trioxide 0.2~5%, 불소변성 PE계 왁스 1~5%, 안료 1~10% 및 잔부 물을 포함하는 착색 도장용액을 코팅한 후 건조함으로써 착색 도장층을 형성하는 공정;을 포함하는 CGL 공정을 이용한 고내식 착색 도금강판 제조방법에 관한 것이다. A colored coating device, which is a post-treatment device, is installed at the rear end of the CGL process, and on the surface of the prepared hot-dip galvanized steel sheet, by weight, 0.5 to 5% of Si compound, 48 to 58 of water-soluble anionic urethane-acrylic copolymer resin %, Chromium reducing agent 0.3~5%, Chromium trioxide 0.2~5%, Fluorine-modified PE-based wax 1~5%, Pigment 1~10%, and the remaining coating water Forming process; relates to a method for manufacturing a high corrosion-resistant colored steel sheet using a CGL process comprising.
상기 착색 도장층을 형성하는 공정에서, 착색 도장용액을 1100~4000㎎/㎡ 코팅한 후 건조하는 것이 바람직하다. In the step of forming the colored coating layer, it is preferable to coat the colored coating solution with 1100 to 4000 mg/m 2 and then dry.
상기 착색 도장층의 두께가 1~4㎛ 인 것이 바람직하다. It is preferable that the thickness of the colored coating layer is 1 to 4 μm.
이와 같은 본 발명의 측면에 의하면, 색상을 부여하기 위해 종래의 CCL공정을 거치지 않게 됨으로써, 높은 제조원가문제를 해결할 수 있다. According to this aspect of the present invention, by not going through the conventional CCL process to impart color, it is possible to solve the high manufacturing cost problem.
도 1은 본 발명의 일실시예에 따른 착색용액이 코팅된 고내식 착색 도금강판을 보이는 단면 개략도이다. 1 is a schematic cross-sectional view showing a highly corrosion-resistant colored plated steel sheet coated with a coloring solution according to an embodiment of the present invention.
이하, 본 발명을 설명한다. Hereinafter, the present invention will be described.
본 발명의 고내식 착색 도금강판은 소지 강판 표면위에 도금된 고내식 아연 합금 도금층과, 상기 고내식 마그네슘 아연 합금 도금층의 표면 및/또는 이면에 도장된 착색도장층을 포함한다. The high corrosion-resistant colored plated steel sheet of the present invention includes a high corrosion-resistant zinc alloy plating layer plated on the surface of the base steel plate, and a coloring coating layer coated on the surface and/or the back surface of the high corrosion-resistant magnesium zinc alloy plating layer.
이러한 고내식 착색 도금강판은, CGL(Continuous Galvanized Line) 공정에서, 소지강판을, 욕 온도가 440~465℃이고, 중량%로 Al: 1.1~1.7%, Mg: 1.1 ~1.7%, Zn: 96.6~97.8% 및 불순물을 포함하는 마그네슘이 함유된 용융아연도금욕에 연속적으로 침지한 후 건조함으로써 용융아연 도금강판을 제조하는 공정; 그리고 상기 CGL 공정의 후단에 후처리 장치인 착색 도장장치를 설치하여, 상기 제조된 용융아연합금 도금강판 표면에, 중량%로, Si화합물 0.5~5%, 수용성 음이온 우레탄-아크릴 공중합체 수지 48~58%, 크롬 환원제 0.3~5%, Chromium trioxide 0.2~5%, 불소변성 PE계 왁스 1~5%, 안료 1~10% 및 잔부 물을 포함하는 착색 도장용액을 코팅한 후 건조함으로써 착색 도장층을 형성하는 공정;을 포함하는 제조방법으로 제조될 수 있다. The highly corrosion-resistant colored plated steel sheet, in the CGL (Continuous Galvanized Line) process, the holding steel sheet, the bath temperature is 440 ~ 465 ℃, Al: 1.1 ~ 1.7% by weight, Mg: 1.1 ~ 1.7%, Zn: 96.6 Process for manufacturing a hot-dip galvanized steel sheet by continuously immersing in a hot dip galvanizing bath containing magnesium containing ˜97.8% and impurities, followed by drying; In addition, a colored coating device, which is a post-treatment device, was installed at the rear end of the CGL process, and, on the surface of the prepared hot-dip zinc alloy plated steel sheet, by weight, 0.5 to 5% of Si compound, water-soluble anionic urethane-acrylic copolymer resin 48~ 58%, chromium reducing agent 0.3~5%, Chromium trioxide 0.2~5%, fluorine-modified PE-based wax 1~5%, pigment 1~10%, and the color coating solution containing the remaining water and then dried to coat the color coating layer It may be manufactured by a manufacturing method comprising a; forming process.
본 발명에서는 고내식 착색 도장강판을 제조하기 위하여, 용융아연 합금도금강판을 CGL(Continuous Galvanized Line) 공정을 이용하여 제조한다. 그리고 CGL 공정의 후단에 착색 도장 장치를 설치하여 상기 CGL공정으로부터 연속적으로 배출되는 용융아연합금 도금강판 표면에 착색 도장층을 형성한다.In the present invention, in order to manufacture a highly corrosion-resistant colored coated steel sheet, a hot-dip galvanized steel sheet is manufactured using a CGL (Continuous Galvanized Line) process. Then, a colored coating device is installed at the rear end of the CGL process to form a colored coating layer on the surface of the hot-dip galvanized steel sheet discharged continuously from the CGL process.
즉, 먼저, 본 발명에서는 소지강판을 준비한다. 이러한 소지강판을 소재의 스케일 제거등 표면청정을 위한 전처리공정과, 도금밀착성을 제고하기 위한 소둔공정을 거친 것이 바람직하다. 또한 본 발명에서는 상기 소지강판의 성분 및 종류 등에 제한되지 않는다. That is, first, in the present invention, a steel sheet is prepared. It is preferable that such a steel sheet has been subjected to a pre-treatment process for surface cleaning such as removal of scale of the material, and an annealing process for enhancing plating adhesion. In addition, the present invention is not limited to the components and types of the steel sheet.
본 발명에서는 CGL공정에서 상기 소지강판을, 욕 온도가 440~465℃이고, 중량%로 Al: 1.1~1.7%, Mg: 1.1 ~1.7%, Zn: 96.6~97.8% 및 불순물을 포함하는 마그네슘이 함유된 용융아연도금욕에 연속적으로 침지한 후 건조함으로써 용융아연 도금강판을 제조한다. In the present invention, in the CGL process, the steel sheet, the bath temperature is 440 ~ 465 ℃, Al: 1.1 ~ 1.7% by weight, Mg: 1.1 ~ 1.7%, Zn: 96.6 ~ 97.8% and magnesium containing impurities A hot dip galvanized steel sheet is prepared by continuously immersing in a hot dip galvanizing bath and drying.
상기 고내식 마그네슘 아연 합금 도금층은, 중량%로, Al: 1.1~1.7%, Mg: 1.1~1.7%, Zn: 96.6~97.8% 포함하는것이 바람직하다. The high corrosion-resistant magnesium zinc alloy plating layer, by weight, Al: 1.1 to 1.7%, Mg: 1.1 to 1.7%, it is preferable to include Zn: 96.6 to 97.8%.
그리고 상기 소지강판 상에 부착되는 용융 마그네슘 아연 합금 도금층의 부착량 또한 제한되지 아니하나, 90g/㎡(양면 기준, 일면 45 g/㎡) 이상으로 제한함이 바람직하다. 이는, 상기 도금층의 도금량이 90 g/㎡ 미만일 경우, 우수한 내식성의 물성을 만족하기 어렵기 때문이다. And the adhesion amount of the molten magnesium zinc alloy plating layer adhered to the steel sheet is also not limited, but is preferably limited to 90 g/m 2 (based on both sides, 45 g/m 2 on one side) or more. This is because when the plating amount of the plating layer is less than 90 g/m 2, it is difficult to satisfy excellent corrosion resistance properties.
이어, 본 발명에서는 CGL의 후처리 공정에서 상기 고내식 마그네슘 아연 합금 도금층이 형성된 소지강판의 일면 또는 양면에, 중량%로 Si화합물 0.5~5%, 수용성 음이온 우레탄-아크릴 공중합체 수지 48~58%, 크롬 환원제 0.3~5%, Chromium trioxide 0.2~5%, 불소변성 PE계왁스 1~5%, 안료 1~10%, 잔량 물로 이루어진 착색 용액을 코팅한다.Subsequently, in the present invention, in the post-treatment process of CGL, Si or 0.5 to 5% by weight of Si compound, 48 to 58% of water-soluble anionic urethane-acrylic copolymer resin on one or both sides of the steel sheet having the high corrosion-resistant magnesium zinc alloy plating layer formed thereon , Chromium reducing agent 0.3 ~ 5%, Chromium trioxide 0.2 ~ 5%, fluorine-modified PE-based wax 1 ~ 5%, pigment 1 ~ 10%, coating the coloring solution consisting of residual water.
본 발명에서는 상기 Si화합물은 소재와 용액간 부착성을 증진시키며, 내스크래치성을 높여주는 역할을 한다. 만일 Si화합물이 0.5% 미만이 되면 소재와의 부착성이 떨어져 가공시 후처리 박리 되며, 5%를 초과하면 용액 저장 안정성에 문제가 있을 수 있다. In the present invention, the Si compound promotes adhesion between the material and the solution, and serves to increase scratch resistance. If the Si compound is less than 0.5%, the adhesion with the material is poor and the post-treatment peels off during processing. If it exceeds 5%, there may be a problem in solution storage stability.
상기 수용성 음이온 우레탄-아크릴 공중합체 수지는 용액의 바인딩 및 응집역할을 하며, 내식성에 영향을 준다. The water-soluble anionic urethane-acrylic copolymer resin serves as a binding and cohesive agent for the solution and affects corrosion resistance.
상기 Chromium trioxide는 내식성 증진 목적으로 첨가하게 되며, 0.2 중량% 이하 함유시 내식성이 저하되어 물성만족이 어려우며, 5%를 초과하면 쇼크 현상이 빌생할 수 있다. The Chromium trioxide is added for the purpose of improving corrosion resistance, and when the content is less than 0.2% by weight, the corrosion resistance is deteriorated, which makes it difficult to satisfy physical properties. If it exceeds 5%, a shock phenomenon may occur.
상기 크롬환원제는 Chromium trioxide의 중화작용을 한다. The chromium reducing agent neutralizes Chromium trioxide.
상기 불소변성 PE계 왁스는 윤활성부여를 통해 가공시 마찰력을 최소로 하여 스크래치가 발생하지 않도록 도와주는 역할을 한다. 상기 왁스 성분이 1중량% 미만시 마찰력이 커져 스크래치가 발생될 위험이 있으며, 이로인해 용액도장층이 박리된다. 또한 5 중량%를 초과 첨가 시 윤활성이 과다하게 증대되어 가공시 가공이 되지 않고, 미끄러지는 현상이 발생한다. 따라서 상기 왁스 성분은 1~5 중량%를 함유시키는 것이 바람직하다. The fluorine-modified PE-based wax serves to help prevent scratching by minimizing friction during processing through the provision of lubricity. When the wax component is less than 1% by weight, there is a risk of scratching due to a large frictional force, which causes the solution coating layer to peel off. In addition, when the excess amount is added in excess of 5% by weight, the lubricity is excessively increased. Therefore, it is preferable that the wax component contains 1 to 5% by weight.
상기 안료는 수용성 안료를 사용할 수 있다. 색상 투명도를 조정하기 위해 함유량을 조절하며, 1% 미만시 색상이 표출되지 않으며, 10%를 초과하면 불필요하게 과다 첨가하게 되어 비경제적이다. The pigment may be a water-soluble pigment. To adjust the color transparency, the content is adjusted, and if it is less than 1%, the color is not displayed, and if it exceeds 10%, it is uneconomical because it is unnecessaryly added excessively.
이때, 상기 착색용액을 코팅할때, 그 도장 부착량은 1100~4000㎎/㎡ 범위로 관리함이 바람직하다. 상기 용액 부착량이 1100㎎/㎡ 미만인 경우 내식성이 저하된다. At this time, when coating the coloring solution, it is preferable to manage the coating adhesion amount in the range of 1100 ~ 4000mg / ㎡. When the solution adhesion amount is less than 1100 mg/m 2, corrosion resistance is deteriorated.
이어, 본 발명에서는 상기와 같이 착색용액이 코팅된 아연합금 도금강판은 온도 100℃에서 15초 이상 건조함으로써 최종 도막층을 형성한다.Subsequently, in the present invention, the zinc alloy plated steel sheet coated with the coloring solution is dried at a temperature of 100° C. for 15 seconds or more to form a final coating layer.
이하, 실시예를 통하여 본 발명을 설명한다. Hereinafter, the present invention will be described through examples.
(실시예 1)(Example 1)
CGL공정을 이용하여 0.45T의 냉연강판 표면에 도금부착량 양면 120g/㎡(일면 60g/㎡) 적용하여 중량%로 Al: 1.1~1.7%, Mg: 1.1 ~ 1.7%, Zn: 96.6~97.8% 포함하는 용융아연합금 도금강판을 제조였다. 이어, 연속하는 CGL 후처리 공정에서 상기 용융아연합금 도금강판 표면에 중량%로 Si 화합물 2%, 수용성 음이온 우레탄-아크릴 공중합체 수지 52%, Chromium trioxide 2.5%, 크롬환원제 5%, 왁스 2%, 안료 2%, 잔류 물로 이루어진 착색 용액을 하기 표 1과 같이 그 도포량을 달리하여 코팅하여 그 표면에 착색 도장층이 형성된 고내식 마그네슘 함유하는 용융아연 도금강판을 제조하였다. By applying CG process to the surface of the cold rolled steel sheet of 0.45T, plating adhesion amount 120g/㎡ (one side 60g/㎡) is applied in weight%, including Al: 1.1~1.7%, Mg: 1.1~1.7%, Zn: 96.6~97.8% The hot-dip zinc alloy plated steel sheet was manufactured. Subsequently, in a continuous CGL post-treatment process, 2% by weight of Si compound on the surface of the hot-dip zinc alloy plated steel sheet, 52% of water-soluble anionic urethane-acrylic copolymer resin, 2.5% of Chromium trioxide, 5% of chromium reducing agent, 2% of wax, A coloring solution composed of pigment 2% and residual water was coated with different coating amounts as shown in Table 1 below to prepare a hot-dip galvanized steel sheet containing high corrosion-resistant magnesium with a colored coating layer formed on its surface.
이와 같이, 제조된 아래와 같은 평가 기준에 의해 특성을 평가하였으며, 그 결과를 또한 하기 표 1에 나타내었다. Thus, the characteristics were evaluated by the following evaluation criteria prepared, and the results are also shown in Table 1 below.
<부착량><Adhesive amount>
부착량은 XRF 기기를 이용하여 평가하였다. The adhesion amount was evaluated using an XRF instrument.
<외관><appearance>
외관은 착색 용액 도장시 사용한 후처리 설비의 롤로 인해 발생한 롤자국의 유무로 평가하였다. 롤자국은 세로 선상으로 발생하는데, 롤자국이 선명하게 발생하면 0점, 롤자국 없이 균일하게 도장 시 5점으로 평가하였다.The appearance was evaluated by the presence or absence of roll marks caused by the rolls of the post-treatment equipment used when painting the coloring solution. The roll marks occur in a vertical line. When the roll marks occurred clearly, they were evaluated as 0 points and 5 points when applied uniformly without the roll marks.
<내식성><Corrosion resistance>
내식성 평판은 5% NaCl, 35℃에서 500시간 이후 백청발생 5% 이내 만족시 5점, 10% 이내 4점, 20% 이내 3점, 30% 이내 2점, 40% 이상 1점으로 평가하였다. The corrosion-resistant plate was evaluated as 5 points within 5%, 4 points within 10%, 3 points within 20%, 2 points within 30%, 40% or more and 1 point after satisfactory within 5% of white rust after 500 hours at 5% NaCl, 35℃.
가공부의 경우 에릭슨 시험법에 의해 6㎜가공, 5% NaCl, 35℃에서 120 시간 이후 백청발생 5% 이내 만족시 5점, 10% 이내 4점, 20% 이내 3점,30% 이내 2점 40% 이상 1점으로 평가하였다. In the case of the processing part, 6 mm processing by Ericsson test method, 5% NaCl, after 120 hours at 35°C When white rust occurs within 5%, 5 points within 10%, 4 points within 10%, 3 points within 20%, 2 points within 30% 40 % Or more.
<내습성><Moisture resistance>
내습성 평판은 50℃, 90% 환경에서 120시간 이후 색차계로 실험 전 후 측정값이 ΔE≤3을 만족시 5점, ΔE가 4이하 4점, ΔE가 5이하 3점, ΔE가 6이하 2점, ΔE가 7이상 1점으로 평가하였다. Moisture-resistant flat plate with color difference meter after 50 hours at 50℃, 90% environment, 5 points, ΔE is 4 or less 4 points, ΔE is 5 or less 3 points, ΔE is 6 or less 2 A point and (DELTA)E were rated as 7 or more and 1 point.
적층은 50℃, 90%환경에서 20Kgf.cm2, 하중을 가한 상태에서 120시간 이후 색차계로 실험 전 후 측정값이 ΔE≤3 을 만족시 5점, ΔE가 4이하 4점, ΔE가 5이하 3점, ΔE가 6이하 2점, ΔE가 7이상 1점으로 평가하였다. Lamination is 50K, 20Kg f .cm 2 at 90% environment, and after 120 hours under load, 5 points if the measured value satisfies ΔE≤3 before and after the experiment with a color difference meter, ΔE is 4 or less, 4 points, ΔE is 5 The following three points were evaluated, ΔE was 6 or less, 2 points, and ΔE was 7 or more and 1 point.
<내약품성><Chemical resistance>
내약품성은 5% 알칼리, 5% 산 각각 착색도장면 표면에 드롭 5분 경화 후 색차계로 실험 전 후 측정값이 ΔE≤3 을 만족시 5점, ΔE가 4이하 4점, ΔE가 5이하 3점, ΔE가 6이하 2점, ΔE가 7이상 1점으로 평가하였다. The chemical resistance is 5% alkali, 5% acid, respectively. Drops on the surface of colored paint. After curing for 5 minutes, the color difference meter gives 5 points when the measured value satisfies ΔE ≤ 3, ΔE is 4 or less, 4 points, ΔE is 5 or less, 3 points. , ΔE was 6 or less and 2 points, ΔE was 7 or more and 1 point.
<마찰계수><Friction coefficient>
Alteck Mobility Tester를 이용하여 마찰계수를 측정하였다. The friction coefficient was measured using Alteck Mobility Tester.
<도막밀착성><Film adhesion>
평판 밀착성(Cross Cut Test)은 건조된 착색도장면 표면에 커터칼로 1㎜ 간격으로 교차되게 그어 눈금칸 100개를 만든후 3M 투명 테이프를 압착시켰다가 떼어내어 평가하였다. 100개의 눈금칸 중 투명테이프에 의해 떼어지지 않고 부착되어 있는 칸수를 표기하였다. The flat plate adhesiveness (Cross Cut Test) was evaluated by crossing the surface of the dried colored paint with a cutter knife at intervals of 1 mm to make 100 divisions, and then squeezing and peeling the 3M transparent tape. The number of cells attached without being separated by the transparent tape among the 100 divisions was indicated.
가공부 밀착성(Cross Cut Erichsen Test)는 상기 방법과 동일하게 착색 도장면 표면에 100개의 눈금칸을 만든 후 6㎜ Erichsen Test를 진행한 후 3M 투명 테이프를 압착시켰다가 떼어내어 평가하였다. 100개의 눈금칸 중 투명테이프에 의해 떼어지지 않고 부착되어있는 칸수를 표기하였다. The adhesion of the processed part (Cross Cut Erichsen Test) was evaluated by making 100 graduations on the surface of the colored coating surface in the same manner as the above method, and then conducting a 6mm Erichsen Test, squeezing and removing 3M transparent tape. The number of cells attached without being removed by the transparent tape among the 100 divisions was indicated.
<내지문성><Fingerprint resistance>
내지문성은 착색도장면 표면에 바세린 도포 1시간 전 후 색차를 색차계를 이용하여 측정하여 평가하였다. ΔE≤2을 만족시 5점, ΔE가 3이하 4점, ΔE가 4이하 3점, ΔE가 5이하 2점, ΔE가 6이상 1점으로 평가하였다.The anti-fingerprint property was evaluated by measuring the color difference with a colorimeter one hour before and after applying vaseline on the surface of the colored paint. When ΔE≤2 was satisfied, 5 points, ΔE was 3 or less, 4 points, ΔE was 4 or less, 3 points, ΔE was 5 or less, 2 points, ΔE was 6 or 1 point.
<내비등수성><Boiling water resistance>
내비등수성은 순수 100 ± 3℃, 5min 침적후 꺼내어 0T 180˚밴딩한 후 밴딩부위에 3M 투명테이프를 붙였다 떼었을 때, 가공면의 박리 및 크랙여부를 평가하였다. 투명테이프에 묻어나지 않으면 5점, 박리 및 크랙이 발생하여 묻어나면 1점으로 평가하였다. The boiling water resistance was evaluated after the deposition of pure 100 ± 3℃, 5min, and then taken out, 0T 180° bending, and then attaching and detaching 3M transparent tape to the banding part, peeling and cracking of the processed surface. If it did not adhere to the transparent tape, it was evaluated as 5 points, and when peeling and cracking occurred, it was evaluated as 1 point.
상기 표 1의 실험결과에서 알 수 있는 바와 같이, 착색용액 부착량은 물성에 영향을 미치며 최적 부착량은 최소 1000㎎/㎡ 초과, 최대 4500㎎/㎡ 미만인 것을 알 수 있다. As can be seen from the experimental results in Table 1, it can be seen that the amount of the colored solution adheres to the physical properties, and the optimum adhesion amount is less than 1000 mg/m2 and less than the maximum of 4500 mg/m2.
(실시예 2)(Example 2)
고내식 마그네슘 아연 도금강판층상에 CGL 공정에서 직접 색상을 부여한 실시예 1 중 발명예 2의 착색 고내식 도금강판을 종래 CCL공정에서 생산된 저가형 PCM강판과 비교하기 위해 실시예 1과 같은 평가를 실시하였으며, 그 결과를 하기 표 2에 나타내었다. The same evaluation as in Example 1 was performed to compare the colored high corrosion-resistant plated steel sheet of Inventive Example 2 of Example 1 in which the color was directly applied in the CGL process on the high corrosion-resistant magnesium galvanized steel sheet layer to the low-cost PCM steel sheet produced in the conventional CCL process. The results are shown in Table 2 below.
종래 CCL공정에서 이용한 도금강판은, 중량%로, Zn 98%와 Al 0.2%를 포함하는 용융아연 도금강판이며, CCL 공정에서 상기 용융아연 도금강판 표면에, 중량%로, 세라믹 수지 50%, 폴리에스테르수지 10%, 멜라민 수지 5%, 이소시아네이트수지5%, 소포제 0.5%, 레벨링제 0.5% 탄화수소계 용제 10%, ETHER계 용제 2.5%, Alchol계 용제 5%, Ketone계 용제 5% 및 조색제 7%를 포함하는 도료를 도장하여 제조된 도막 두께 3㎛의 실리콘수지 도장강판이다. The plated steel sheet used in the conventional CCL process is a hot-dip galvanized steel sheet containing 98% Zn and 0.2% Al by weight, and on the surface of the hot-dip galvanized steel sheet in the CCL process, by weight%, 50% ceramic resin, poly Ester resin 10%, melamine resin 5%, isocyanate resin 5%, antifoaming agent 0.5%, leveling agent 0.5% hydrocarbon-based solvent 10%, ETHER-based solvent 2.5%, alcohol-based solvent 5%, ketone-based solvent 5% and colorant 7% It is a silicone resin coated steel sheet having a coating thickness of 3㎛ prepared by painting a coating containing a.
상기 표 2에 나타난 바와 같이, 마찰계수 외 그 밖의 항목에 대한 평가 결과는 동등 수준임을 보여주고 있다. 마찰계수에 차이가 존재했으나, 이는 실 사용에 영향을 미치지 않는 수치이다. As shown in Table 2 above, the evaluation results for the items other than the friction coefficient show that they are equivalent. There was a difference in the friction coefficient, but this is a value that does not affect the actual use.
이상에서 설명한 바와 같이, 본 발명의 상세한 설명에서는 본 발명의 바람직한 실시 예에 관하여 설명하였으나, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 본 발명의 범주에서 벗어나지 않는 한도 내에서 여러 가지 변형이 가능함은 물론이다. 따라서 본 발명의 권리 범위는 설명된 실시 예에 국한되어 정해져서는 안 되며, 후술하는 청구범위뿐만 아니라, 이와 균등한 것들에 의해 정해져야 한다.As described above, in the detailed description of the present invention, the preferred embodiments of the present invention have been described, but those skilled in the art to which the present invention pertains have various modifications within the limits that do not depart from the scope of the present invention. Of course this is possible. Therefore, the scope of rights of the present invention should not be limited to the described embodiments, but should be determined by the equivalents as well as the claims described later.
Claims (3)
상기 CGL 공정의 후단에 후처리 장치인 착색 도장장치를 설치하여, 상기 제조된 용융아연합금 도금강판 표면에, 중량%로, Si화합물 0.5~5%, 수용성 음이온 우레탄-아크릴 공중합체 수지 48~58%, 크롬 환원제 0.3~5%, Chromium trioxide 0.2~5%, 불소변성 PE계 왁스 1~5%, 안료 1~10% 및 잔부 물을 포함하는 착색 도장용액을 코팅한 후 건조함으로써 착색 도장층을 형성하는 공정;을 포함하는 CGL 공정을 이용한 고내식 착색 도금강판 제조방법.
In the CGL (Continuous Galvanized Line) process, the steel sheet, the bath temperature is 440 ~ 465 ℃, by weight Al: 1.1 ~ 1.7%, Mg: 1.1 ~ 1.7%, Zn: 96.6 ~ 97.8% and containing impurities Process of manufacturing a hot-dip galvanized steel sheet by continuously immersing in a hot dip galvanizing bath containing magnesium and then drying; And
A colored coating device, which is a post-treatment device, is installed at the rear end of the CGL process, and on the surface of the prepared hot-dip galvanized steel sheet, by weight, 0.5 to 5% of Si compound, 48 to 58 of water-soluble anionic urethane-acrylic copolymer resin %, Chromium reducing agent 0.3~5%, Chromium trioxide 0.2~5%, Fluorine-modified PE-based wax 1~5%, Pigment 1~10%, and the remaining coating water Method of manufacturing a high corrosion-resistant colored plated steel sheet using a CGL process comprising a.
The method of claim 1, wherein in the step of forming the colored coating layer, the colored coating solution is coated with an adhesion amount in the range of 1100 to 4000 mg/m 2, followed by drying to produce a highly corrosion-resistant colored plated steel sheet using a CGL process. Way.
The method according to claim 1, wherein the colored coating layer has a thickness of 1 to 4 μm.
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| KR20220014919A (en) | 2020-07-29 | 2022-02-08 | 포스코강판 주식회사 | Method for manufacturing Zn-Mg-Al coated steel plate having surfacce colored layer with high incombustibility, and Zn-Mg-Al coated steel plate thus obtained |
| KR20250002860A (en) | 2023-06-30 | 2025-01-07 | 아주스틸 주식회사 | Manufacturing method of 3-base coated color steel sheet having high corrosion resistance using combined galvanizing and color coating line and manufacturing apparatus using the same |
| KR102786745B1 (en) * | 2023-06-30 | 2025-03-26 | 아주스틸 주식회사 | Manufacturing method of 3-base coated color steel sheet having high corrosion resistance using combined galvanizing and color coating line and manufacturing apparatus using the same |
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| JP3029798B2 (en) * | 1995-07-31 | 2000-04-04 | 住友金属工業株式会社 | Lubricated steel sheet and its film-forming composition |
| KR20170076258A (en) * | 2015-12-24 | 2017-07-04 | 주식회사 포스코 | Composition for surface-treating a steel sheet, surface-treated steel sheet using the same composition, and method for manufacturing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20220014919A (en) | 2020-07-29 | 2022-02-08 | 포스코강판 주식회사 | Method for manufacturing Zn-Mg-Al coated steel plate having surfacce colored layer with high incombustibility, and Zn-Mg-Al coated steel plate thus obtained |
| KR20250002860A (en) | 2023-06-30 | 2025-01-07 | 아주스틸 주식회사 | Manufacturing method of 3-base coated color steel sheet having high corrosion resistance using combined galvanizing and color coating line and manufacturing apparatus using the same |
| KR102786745B1 (en) * | 2023-06-30 | 2025-03-26 | 아주스틸 주식회사 | Manufacturing method of 3-base coated color steel sheet having high corrosion resistance using combined galvanizing and color coating line and manufacturing apparatus using the same |
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