KR20140002881A - Method for manufacturing brass plating steel sheet - Google Patents
Method for manufacturing brass plating steel sheet Download PDFInfo
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- KR20140002881A KR20140002881A KR1020120069638A KR20120069638A KR20140002881A KR 20140002881 A KR20140002881 A KR 20140002881A KR 1020120069638 A KR1020120069638 A KR 1020120069638A KR 20120069638 A KR20120069638 A KR 20120069638A KR 20140002881 A KR20140002881 A KR 20140002881A
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- KR
- South Korea
- Prior art keywords
- steel sheet
- plating
- brass
- zinc
- copper
- Prior art date
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- 238000007747 plating Methods 0.000 title claims abstract description 131
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 40
- 239000010951 brass Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- 239000010949 copper Substances 0.000 claims abstract description 52
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000011701 zinc Substances 0.000 claims abstract description 45
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000009792 diffusion process Methods 0.000 claims description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 8
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 19
- 241000220259 Raphanus Species 0.000 description 15
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 description 15
- 238000005238 degreasing Methods 0.000 description 12
- 239000010960 cold rolled steel Substances 0.000 description 11
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 8
- 229910000368 zinc sulfate Inorganic materials 0.000 description 8
- 229960001763 zinc sulfate Drugs 0.000 description 8
- 238000005554 pickling Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- DBGSRZSKGVSXRK-UHFFFAOYSA-N 1-[2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]acetyl]-3,6-dihydro-2H-pyridine-4-carboxylic acid Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CCC(=CC1)C(=O)O DBGSRZSKGVSXRK-UHFFFAOYSA-N 0.000 description 1
- VPSXHKGJZJCWLV-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-(1-ethylpiperidin-4-yl)oxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OC1CCN(CC1)CC VPSXHKGJZJCWLV-UHFFFAOYSA-N 0.000 description 1
- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- NZOBMQKUUTZNND-UHFFFAOYSA-N copper scandium Chemical compound [Sc].[Cu] NZOBMQKUUTZNND-UHFFFAOYSA-N 0.000 description 1
- DOBRDRYODQBAMW-UHFFFAOYSA-N copper(i) cyanide Chemical compound [Cu+].N#[C-] DOBRDRYODQBAMW-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- -1 or the like Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- 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
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- 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
-
- 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
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Description
본 발명은 황동 도금 강판의 제조 방법에 관한 것으로, 보다 상세하게는 색상의 균일도가 높고 색상 조절이 용이한 황동 도금 강판의 제조 방법에 관한 것이다.The present invention relates to a method of manufacturing a brass plated steel sheet, and more particularly, to a method of manufacturing a brass plated steel sheet having high color uniformity and easy color control.
냉연 강판은 자동차, 건축 자재, 가전 제품에 많이 사용되고 있다. 특히, 가전 제품의 경우 내식성의 향상이라는 도금 강판의 고유 기능 외에도 장식품으로서의 기능도 가지고 있다. 그 결과, 강판의 색상과 외관은 중요하다.Cold rolled steel sheets are widely used in automobiles, building materials, and household appliances. In particular, in the case of home appliances, it also has the function of decorative ornaments in addition to the inherent functions of the coated steel sheet, namely, improvement of corrosion resistance. As a result, the color and appearance of the steel sheet are important.
냉연 강판 중 도금 강판은 전기 아연 도금 강판이 많이 사용되고 있다. 그러나, 전기 아연 도금 강판은 금속 고유의 외관을 나타내기는 하지만, 아연 단독으로 도금되어 있어 색상과 다양한 표면 외관 효과를 제공함에 있어 한계점이 있다.Among cold-rolled steel sheets, galvanized steel sheets are widely used for coated steel sheets. However, although the electro-galvanized steel sheet exhibits a metal-specific appearance, it is plated with zinc alone, which is a limitation in providing color and various surface appearance effects.
따라서, 최근에는 기존의 전기 아연 도금 강판을 대체하여, 황동 도금 강판을 개발하고 있는 추세이다. Therefore, in recent years, there has been a tendency to develop brass-plated steel sheets in place of conventional galvanized steel sheets.
관련 선행기술로는 한국등록특허 제10-0458259호(등록일:2004.11.12, 발명의 명칭: 비시안화물 황동 도금욕 및 비시안화물 황동 도금욕을 이용한 황동층을 갖는 금속박의 제조 방법)가 있다.As a related prior art, there is Korean Patent No. 10-0458259 (registered on Nov. 12, 2004, entitled " Method for producing metal foil having brass layer using non-cyanide brass plating bath and non-cyanide brass plating bath) .
본 발명의 목적은 색상의 균일도가 높고 색상 조절이 용이한 황동 도금 강판의 제조 방법을 제공하는 것이다.An object of the present invention is to provide a method of manufacturing a brass plated steel sheet having high color uniformity and easy color control.
본 발명의 다른 목적은 다양한 색상과 다양한 표면 외관 효과를 구현할 수 있는 황동 도금 강판의 제조 방법을 제공하는 것이다. Another object of the present invention is to provide a method of manufacturing a brass plated steel sheet which can realize various color and various surface appearance effects.
본 발명의 또 다른 목적은 기존의 복합 도금 방법에 비해 제조 작업성이 우수한 황동 도금 강판의 제조 방법을 제공하는 것이다. Another object of the present invention is to provide a method of manufacturing a brass plated steel sheet which is superior in manufacturing workability to a conventional composite plating method.
상기 목적을 달성하기 위한 본 발명의 황동 도금 강판의 제조 방법은 전처리 단계를 거친 강판을 구리와 아연 중 선택된 어느 하나로 도금하는 제1 도금 단계, 상기 제1 도금 단계를 거친 강판을 구리와 아연 중 상기 제1 도금 단계에서 선택된 것을 제외한 나머지로 도금하는 제2 도금 단계, 및 상기 제2 도금 단계를 거친 강판을 확산 열처리하는 단계를 포함하는 것을 특징으로 한다.In order to accomplish the above object, the present invention provides a method of manufacturing a brass-plated steel sheet, comprising: a first plating step of plating a steel plate subjected to a pretreatment step with copper or zinc; A second plating step of plating the remainder of the steel plate with the remainder other than the one selected in the first plating step, and a step of diffusing heat treatment of the steel plate subjected to the second plating step.
구리 도금에 의한 구리 도금층과 아연 도금에 의한 아연 도금층의 합을 기준으로 구리 도금층의 두께: 아연 도금층의 두께는 60-80%:20-40%가 됨을 특징으로 한다.The thickness of the copper plated layer based on the sum of the copper plated layer by copper plating and the zinc plated layer by zinc plating: The thickness of the zinc plated layer is 60-80%: 20-40%.
구리 도금을 수행하는 구리 도금조에서 구리 이온 제공 화합물의 농도는 10-15%가 됨을 특징으로 한다.The concentration of the copper ion providing compound in the copper plating bath performing the copper plating is characterized by being 10-15%.
아연 도금을 수행하는 아연 도금조에서 아연 이온 제공 화합물의 농도는 10-20%가 됨을 특징으로 한다.The zinc ion providing compound concentration in the zinc plating bath performing zinc plating is 10-20%.
상기 확산 열처리는 300-600℃에서 10-50초 동안 수행됨을 특징으로 한다.The diffusion heat treatment is performed at 300-600 DEG C for 10-50 seconds.
상기 전처리 단계 후 상기 제1 도금 단계를 수행하기 전에, 상기 강판을 니켈 플래쉬 처리하는 단계를 더 포함함을 특징으로 한다.And performing a nickel flash treatment on the steel sheet before performing the first plating step after the pretreatment step.
상기 확산 열처리 단계 후 강판을 수세 및 후 처리하는 단계를 더 포함함을 특징으로 한다.And washing and treating the steel sheet after the diffusion heat treatment step.
본 발명에 의하면, 색상의 균일도가 높고 색상 조절이 용이하고, 다양한 색상과 다양한 표면 외관 효과를 구현할 수 있으며, 기존의 복합 도금 방법에 비해 제조 작업성이 우수한 황동 도금 강판의 제조 방법을 제공하는 발명의 효과를 갖는다.According to the present invention, it is possible to provide a method of manufacturing a brass plated steel sheet which has high color uniformity, easy color control, can realize various colors and various surface appearance effects, .
본 발명의 황동 도금 강판의 제조 방법을 일 실시예에 의해 상세하게 설명한다.The method of manufacturing the brass plated steel sheet of the present invention will be described in detail with reference to one embodiment.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법은 전처리 단계를 거친 강판을 구리와 아연 중 선택된 어느 하나로 도금하는 제1 도금 단계, 상기 제1 도금 단계를 거친 강판을 구리와 아연 중 상기 제1 도금 단계에서 선택된 것을 제외한 나머지로 도금하는 제2 도금 단계, 및 상기 제2 도금 단계를 거친 강판을 확산 열처리하는 단계를 포함할 수 있다.A method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention includes: a first plating step of plating a steel sheet subjected to a pre-treatment step with one selected from copper and zinc; A second plating step of plating the remainder of the first plating step with the remainder other than the one selected in the first plating step, and a step of diffusing heat treatment of the steel sheet after the second plating step.
상기 전처리 단계는 강판을 탈지, 산세 및 수세 처리하는 단계를 포함한다. 전처리 단계를 통해 강판의 제조 과정 중에 유입된 유기물, 무기물, 불순물 등을 제거할 수 있다.The pretreatment step includes degreasing, pickling and washing the steel sheet. Organics, minerals, impurities and the like introduced during the manufacturing process of the steel sheet can be removed through the pretreatment step.
상기 탈지 과정은 침적 탈지 공정으로 수행될 수 있다. 침적 탈지 공정은 강판을 고온 알칼리성 용액에 침지시켜 강판 표면의 오일과 불순물을 제거하는 것이다. 탈지 과정은 침적 탈지 공정 이외에, 전해 탈지 공정을 추가로 수행할 수도 있다.The degreasing process may be performed by an immersion degreasing process. The immersion degreasing process is to immerse a steel sheet in a high temperature alkaline solution to remove oil and impurities on the steel sheet surface. In addition to the immersion degreasing process, the degreasing process may further include an electrolytic degreasing process.
상기 전해 탈지 공정은 강판과 스테인레스판을 각각 음극과 양극으로 연결하고 전기를 통하게 하여 강판 표면에 미세한 수소 가스를 발생시켜 줌으로써 표면에 잔존하는 유기물과 불순물을 제거하는 공정이다.The electrolytic degreasing process is a process for removing organic substances and impurities remaining on the surface by connecting a steel plate and a stainless steel plate to a cathode and an anode, respectively, and passing electricity to generate fine hydrogen gas on the surface of the steel plate.
상기 탈지 단계를 거친 강판은 산성욕에 침지함으로써 산세 과정을 거치게 되고, 이후에 수세 처리를 거치게 된다.The steel sheet subjected to the degreasing step is subjected to a pickling process by immersing it in an acidic bath, and then subjected to water washing treatment.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서, 전처리 단계를 거친 강판은 구리와 아연 중 선택된 어느 하나로 도금하는 제1 도금 단계와, 구리와 아연 중 상기 제1 도금 단계에서 선택된 것을 제외한 나머지로 도금하는 제2 도금 단계를 통해 이중으로 도금되게 된다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the steel plate subjected to the pretreatment step is subjected to a first plating step of plating with a selected one of copper and zinc, and a second plating step And the second plating step of plating with the remainder.
상기 제1 도금 단계에서 구리를 도금하고 제2 도금 단계에서 아연을 도금할 수도 있고, 제1 도금 단계에서 아연을 도금하고 제2 도금 단계에서 구리를 도금할 수도 있다. 바람직하게는, 황동 도금의 색상 및 색상 균일도를 고려하여, 제1 도금 단계에서 구리를 도금하고 제2 도금 단계에서 아연을 도금한다.Copper may be plated in the first plating step, zinc may be plated in the second plating step, or zinc may be plated in the first plating step and copper may be plated in the second plating step. Preferably, copper is plated in the first plating step and zinc is plated in the second plating step, taking into account the color and color uniformity of the brass plating.
종래 황동 도금 강판의 제조 방법에서는 하나의 도금조를 이용하여 구리와 아연을 복합적으로 도금하였다. 그러나, 이러한 방법은 상기 도금조의 전해액의 상태에 따라 도금층 색상 조절이 어렵고, 황동색이 균일하지 못하여 얼룩이 발생할 수 있고, 도금 색상이 좋지 않을 수 있다. 또한, 강판 표면에 구리와 아연이 복합적으로 도금되므로, 강판 자체의 상태에 따른 영향을 많이 받을 수 있다.Conventionally, in a method of manufacturing a brass plated steel sheet, copper and zinc are plated together using one plating bath. However, in this method, it is difficult to control the color of the plating layer according to the state of the electrolyte in the plating bath, the brass color may not be uniform, and the plating color may be poor. Further, since the surface of the steel sheet is plated with copper and zinc in a complex manner, the steel sheet itself can be greatly influenced by the state of the steel sheet itself.
반면에, 본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법은 구리와 아연을 이중으로 도금하였다. 그 결과, 강판 자체의 상태에 대한 영향을 덜 받을 수 있으며, 도금층 색상 조절이 용이하고, 색상 균일도가 높아 얼룩이 발생할 가능성이 낮다. On the other hand, in the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, copper and zinc are double-plated. As a result, it is possible to receive less influence on the state of the steel sheet itself, easy color adjustment of the plating layer, and high color uniformity, so that the possibility of occurrence of unevenness is low.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서, 구리 도금을 위한 구리 도금조는 통상의 구리 도금을 위한 전해액에 포함되는 성분을 포함할 수 있다. 예를 들면, 구리 도금조는 구리 이온 제공 화합물로서 3수 피로인산동(CuP2O7. 3H2O), 황산 구리(CuSO4) 등을 포함할 수 있지만, 이에 제한되지 않는다.In the method of manufacturing a brass plated steel sheet according to an embodiment of the present invention, the copper plating bath for copper plating may include a component included in an electrolytic solution for conventional copper plating. For example, the copper plating bath may include, but is not limited to, copper sulfate (CuP 2 O 7 .3H 2 O), copper sulfate (CuSO 4 ), and the like as the copper ion providing compound.
본 명세서에서 '농도'는 중량을 의미한다. In the present specification, "concentration" means weight.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 구리 도금조에서 구리 이온 제공 화합물의 농도는 10-15%가 될 수 있다. 상기 범위에서, 도금 완료시 황동 색상이 잘 나와 표면 외관이 좋고, 색상 균일도가 높을 수 있다.In the method of manufacturing the brass-plated steel sheet according to the embodiment of the present invention, the concentration of the copper ion providing compound in the copper plating bath may be 10-15%. In the above range, the brass color is good when the plating is completed, the surface appearance is good, and the color uniformity can be high.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 구리 도금조는 상기 구리 이온 제공 화합물 이외에, 도금이 잘 되도록 하기 위하여 피로인산칼륨(K4P2O7) 20-60%를 더 포함할 수 있다.In the method of manufacturing a brass plated steel sheet according to an embodiment of the present invention, in addition to the copper ion providing compound, the copper plating bath further comprises 20-60% potassium pyrophosphate (K 4 P 2 O 7 ) .
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 구리 도금에 있어서, 구리 도금층의 두께는 2㎛-10㎛가 될 수 있다. 상기 범위에서, 도금이 용이할 수 있고, 도금 완료시 황동 색상이 잘 나와 표면 외관이 좋고, 색상 균일도가 높을 수 있다. 바람직하게는, 구리 도금층의 두께는 3.0㎛-4.0㎛가 될 수 있다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, in copper plating, the thickness of the copper plating layer may be 2 占 퐉 to 10 占 퐉. Within the above range, plating can be facilitated, the brass color can be improved at the completion of plating, the surface appearance can be good, and the color uniformity can be high. Preferably, the thickness of the copper plating layer may be 3.0 占 퐉 to 4.0 占 퐉.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 구리 도금은 구리 도금조의 온도를 30-80℃로 유지한 상태에서 5-40A/dm2의 전류 밀도에서 수행될 수 있다. 상기 범위에서, 도금이 용이할 수 있다. In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the copper plating may be performed at a current density of 5-40 A / dm 2 while maintaining the temperature of the copper plating bath at 30-80 ° C. Within this range, plating may be easy.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 아연 도금을 위한 아연 도금조는 통상의 아연 도금을 위한 전해액에 포함되는 성분을 포함할 수 있다. 예를 들면, 아온 도금조는 아연 이온 제공 화합물로서 5수 황산 아연(ZnSO4. 5H20) 등을 포함할 수 있지만, 이에 제한되지 않는다.In the method of manufacturing a brass plated steel sheet according to an embodiment of the present invention, a zinc plating bath for zinc plating may include a component included in an electrolytic solution for ordinary zinc plating. For example, as a plating bath ahon zinc ion providing compounds and the like can 5 zinc sulfate (ZnSO 4. 5H 2 0), but is not limited thereto.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 아연 도금조에서 아연 이온 제공 화합물의 농도는 10-20%가 될 수 있다. 상기 범위에서, 도금이 용이할 수 있고, 도금 완료시 황동 색상이 잘 나와 표면 외관이 좋고, 색상 균일도가 높을 수 있다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the concentration of the zinc ion providing compound in the zinc plating bath may be 10-20%. Within the above range, plating can be facilitated, the brass color can be improved at the completion of plating, the surface appearance can be good, and the color uniformity can be high.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 아연 도금에서 아연 도금층의 두께는 2.0㎛-2.5㎛가 될 수 있다. 상기 범위에서, 도금 완료시 황동 색상이 잘 나와 표면 외관이 좋고, 색상 균일도가 높을 수 있다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the thickness of the zinc-plated layer in zinc plating may be 2.0 탆 to 2.5 탆. In the above range, the brass color is good when the plating is completed, the surface appearance is good, and the color uniformity can be high.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 아연 도금은 아연 도금조의 온도를 30-80℃로 유지한 상태에서 10-80A/dm2의 전류 밀도에서 수행될 수 있다. 상기 범위에서, 도금이 용이할 수 있다. In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the zinc plating may be performed at a current density of 10-80 A / dm 2 while maintaining the temperature of the zinc plating bath at 30-80 ° C. Within this range, plating may be easy.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 구리 도금층과 아연 도금층의 두께 비율은 구리 도금층과 아연 도금층의 합 100을 기준으로 구리 도금층의 두께: 아연 도금층의 두께는 60-80%:20-40%가 될 수 있다. 상기 범위 내에서, 황동 도금의 색상이 좋아 표면 외관이 좋고, 색상 균일도가 높을 수 있다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the ratio of the thicknesses of the copper plating layer and the zinc plating layer is 100 to 100 times the thickness of the copper plating layer and the zinc plating layer. The thickness of the copper plating layer is 60-80% Can be 20-40%. Within this range, the color of the brass plating is good, the surface appearance is good, and the color uniformity may be high.
상기 제1 도금 단계와 제2 도금 단계 완료 후, 구리 도금과 아연 도금 간에 원자를 상호 확산시켜 황동 합금을 형성하기 위해 확산 열처리를 수행한다.After completion of the first plating step and the second plating step, diffusion heat treatment is performed to form brass alloys by interdiffusion of atoms between copper plating and zinc plating.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 확산 열처리는 제1 도금과 제2 도금이 완료된 강판을 열 처리하는 단계로서, 이를 통해 구리 도금과 아연 도금에 포함된 각각의 구리와 아연이 상호 확산됨으로써 합금을 형성하게 된다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the diffusion heat treatment is a step of heat-treating a steel sheet after completion of the first plating and the second plating, through which copper and zinc contained in each of copper and zinc Thereby forming an alloy.
상기 확산 열처리는 300-600℃에서 수행될 수 있다. The diffusion heat treatment may be performed at 300-600 占 폚.
확산 열처리 온도가 300℃ 미만인 경우 구리와 아연 간에 확산이 잘 일어나지 않고, 600℃ 초과인 경우 높은 온도로 인해 강판의 물성 변화가 발생할 수 있다. 바람직하게는, 400-500℃에서 수행될 수 있다.When the diffusion heat treatment temperature is less than 300 ° C, diffusion between copper and zinc is not likely to occur. If the diffusion heat treatment temperature is higher than 600 ° C, the physical properties of the steel sheet may be changed due to the high temperature. Preferably, it can be carried out at 400-500 占 폚.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법에서 확산 열처리는 10-50초, 바람직하게는 10-20초 동안 수행될 수 있다.In the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention, the diffusion heat treatment may be performed for 10 to 50 seconds, preferably 10 to 20 seconds.
상기 확산 열처리 후, 수세 및 후처리 단계를 더 포함할 수 있다.After the diffusion heat treatment, it may further include washing and post-treatment steps.
상기 후처리 단계는 도금된 강판을 수세하고 보호하기 위한 처리를 포함한다. 예를 들면, 니스 처리, 중화 처리 등을 포함할 수 있다. The post-treatment step includes treatment to wash and protect the plated steel sheet. For example, varnish treatment, neutralization treatment, and the like.
본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법은 전처리 단계 후 제1 도금 단계를 수행하기 전에, 강판을 니켈 플래쉬(Nickel flash) 처리하는 단계를 포함할 수 있다.A method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention may include a step of nickel-flash processing a steel sheet before performing the first plating step after the pretreatment step.
상기 니켈 플래쉬 처리는 강판 표면에 니켈을 얇게 도금하는 것으로서, 추후 도금을 용이하게 한다. 니켈 플래쉬 처리는 통상적인 방법을 사용하여 수행할 수 있다.The nickel flash treatment is performed by thinly plating nickel on the surface of the steel sheet, thereby facilitating plating later. Nickel flash treatment can be performed using conventional methods.
예를 들면, 니켈 플래쉬 처리는 황산니켈(NiSO4), 염화니켈(NiCl2), 탄산니켈(NiCO3), 질산니켈(NiNO3) 등을 포함하는 니켈염, 전도도 보조제, 착화제, 산화제 등을 포함하는 니켈 플래쉬 도금 용액으로 강판을 처리하는 단계를 포함할 수 있다. For example, a nickel flash treatment are nickel sulfate (NiSO 4), nickel chloride (NiCl 2), nickel carbonate (NiCO 3), nickel nitrate (NiNO 3) nickel salt, conductivity auxiliary agent, or the like, complexing agents, oxidizing agents, etc. And treating the steel sheet with a nickel flash plating solution containing the nickel flash plating solution.
이하, 본 발명을 하기 실시예와 비교예를 참조하여 보다 상세하게 설명한다. 그러나, 본 발명이 하기 실시예에 의해 한정되는 것은 아니다.
Hereinafter, the present invention will be described in more detail with reference to the following examples and comparative examples. However, the present invention is not limited by the following examples.
실시예Example 1 One
황동 도금 강판 소재로 저탄소 냉연 강판을 사용하였다. Low-carbon cold-rolled steel sheets were used as the brass-plated steel sheets.
냉연 강판을 탈지, 산세 및 수세로 전처리하였다. 3수 피로인산동(CuP2O7. 3H2O) 10중량%, 피로인산칼륨(K4P2O7) 20중량%를 포함하는 수용액인 구리 도금조를 준비하였다. 상기 구리 도금조를 30℃로 유지한 상태에서, 상기 탈지, 산세 및 수세 처리한 냉연 강판을 담그고 5A/dm2의 전류 밀도에서 도금 두께 3.5㎛로 구리 전기 도금을 실시하였다.The cold-rolled steel sheet was pretreated by degreasing, pickling and water washing. 3 can fatigue the Shandong (CuP 2 O 7. 3H 2 O) 10 % by weight, potassium pyrophosphate (K 4 P 2 O 7) was prepared an aqueous solution of a copper plating bath containing 20% by weight. The above-mentioned copper plating bath was maintained at 30 캜, and the above-described cold-rolled steel sheet subjected to degreasing, pickling and water washing was immersed and copper electroplating was performed at a current density of 5 A / dm 2 at a plating thickness of 3.5 탆.
그런 다음, 5수 황산 아연(ZnSO4. 5H20) 10중량%를 포함하는 수용액인 아연 도금조를 준비하였다. 상기 아연 도금조를 30℃로 유지한 상태에서, 상기 구리 전기 도금된 강판을 담그고 10A/dm2의 전류 밀도에서 도금 두께 2.0㎛로 아연 전기 도금을 실시하였다.Then, an aqueous solution was prepared a zinc plating bath containing 5 may zinc sulfate (ZnSO 4. 5H 2 0) 10 % by weight. The copper electroplated steel sheet was immersed in the zinc plating bath maintained at 30 캜, and zinc electroplating was performed at a current density of 10 A / dm 2 and a plating thickness of 2.0 탆.
그런 다음, 400℃의 확산 열처리 로를 20초 동안 통과시켜 강판 표면에 도금되어 있는 구리와 아연의 원자를 상호 열확산시켜 황동 도금층을 생성하였다.Then, a diffusion heat treatment furnace of 400 ° C. was passed for 20 seconds to thermally diffuse the copper and zinc atoms on the surface of the steel sheet to produce a brass plating layer.
그런 다음, 수세하고 중화 또는 니스 처리를 포함하는 후처리하였다.
It was then rinsed and post-treated, including neutralization or varnish treatment.
실시예Example 2 2
황동 도금 강판 소재로 저탄소 냉연 강판을 사용하였다. Low-carbon cold-rolled steel sheets were used as the brass-plated steel sheets.
냉연 강판을 탈지, 산세 및 수세 처리하였다. 그런 다음 강판을 니켈 플래쉬 도금 용액으로 도금하였다. 그런 다음, 상기 실시예 1에서 3수 피로인산동 농도, 구리 도금 두께, 5수 황산 아연 농도, 아연 도금 두께, 확산 열처리 온도, 확산 열처리 시간을 하기 표 1과 같이 변경한 것을 제외하고는 동일한 방법을 실시하여, 황동 도금층을 생성하였다.
The cold rolled steel sheet was degreased, pickled, and washed. The steel sheet was then plated with nickel flash plating solution. Then, in the same manner as in Example 1, the same method as in Example 1 was used except that the concentration of copper sulfate, copper plating thickness, zinc sulfate concentration, zinc plating thickness, diffusion heat treatment temperature and diffusion heat treatment time were changed as shown in Table 1 below To produce a brass plated layer.
실시예Example 3-6 3-6
상기 실시예 1에서, 3수 피로인산동 농도, 구리 도금 두께, 5수 황산 아연 농도, 아연 도금 두께, 확산 열처리 온도, 확산 열처리 시간을 하기 표 1과 같이 변경한 것을 제외하고는 동일한 방법을 실시하여, 황동 도금층을 생성하였다.
The same method as in Example 1 was carried out except that the concentration of copper triplet, copper plating thickness, zinc sulfate concentration of 5, zinc plating thickness, diffusion heat treatment temperature and diffusion heat treatment time were changed as shown in the following Table 1 To produce a brass plated layer.
비교예Comparative Example 1 One
황동 도금 강판 소재로 저탄소 냉연 강판을 사용하였다. Low-carbon cold-rolled steel sheets were used as the brass-plated steel sheets.
냉연 강판을 상기 실시예 1과 동일한 방법으로 탈지, 산세 및 수세 처리하였다. The cold-rolled steel sheet was degreased, pickled, and washed with water in the same manner as in Example 1.
그런 다음, CuCN 28중량%, Zn(CN)2 14중량%, NaCN 58중량%를 포함하는 수용액인 구리 아연 복합 도금조를 준비하였다. 그런 다음, 상기 구리 아연 복합 도금조를 30℃로 유지한 상태에서, 상기 탈지, 산세 및 수세 처리한 냉연 강판을 담그고 0.5A/dm2의 전류 밀도에서 도금 두께 3.5㎛로 황동 도금을 하였다.
Then, a copper-zinc composite plating bath was prepared, which was an aqueous solution containing 28% by weight of CuCN, 14% by weight of Zn (CN) 2 and 58% by weight of NaCN. Then, the cold-rolled steel sheet subjected to the above degreasing, pickling and washing treatment was immersed in the copper-zinc composite plating bath maintained at 30 캜, and brass plating was carried out at a current density of 0.5 A / dm 2 and a plating thickness of 3.5 탆.
비교예Comparative Example 2 2
상기 실시예 1에서, 확산 열처리를 하지 않은 것을 제외하고는 동일한 방법을 실시하여 강판을 제조하였다.
In Example 1, a steel sheet was manufactured by the same method except that the diffusion heat treatment was not performed.
비교예Comparative Example 3-11 3-11
상기 실시예 1에서, 3수 피로인산동 농도, 구리 도금 두께, 5수 황산 아연 농도, 아연 도금 두께, 확산 열처리 온도, 확산 열처리 시간을 하기 표 1과 같이 변경한 것을 제외하고는 동일한 방법을 실시하여, 황동 도금층을 생성하였다.
The same method as in Example 1 was carried out except that the concentration of copper triplet, copper plating thickness, zinc sulfate concentration of 5, zinc plating thickness, diffusion heat treatment temperature and diffusion heat treatment time were changed as shown in the following Table 1 To produce a brass plated layer.
상기 실시예와 비교예에서 제조한 황동 도금 강판에 대해, 황동 색상 점수를 관능 평가로 평가하고, 균일도는 얼룩 발생 여부로 평가하였다. 황동 색상 점수는 황색에 가까운 정도를 1-5점으로 나누어, 점수화하였다. 점수가 높을수록 도금이 황색에 가까워 색상이 좋음을 의미한다. 점수가 4-5점인 경우 황동 색상 평가에서 합격임을 의미한다. 그 결과를 하기 표 1에 나타내었다.For the brass-plated steel sheets prepared in the above examples and comparative examples, the brass color score was evaluated by sensory evaluation, and the uniformity was evaluated by whether or not a stain occurred. The brass color score was scored by dividing the degree of yellow to 1-5. The higher the score, the better the color is because the plating is near yellow. A score of 4-5 means that the brass color evaluation is acceptable. The results are shown in Table 1 below.
(㎛)Copper plating thickness
(탆)
(%)Zinc sulfate concentration
(%)
(㎛)Zinc plating thickness
(탆)
(℃)Diffusion heat treatment temperature
(℃)
(초)Diffusion heat treatment time
(second)
(얼룩 발생 유무)Uniformity
(Presence or absence of stains)
상기 표 1에서 나타난 바와 같이, 본 발명의 일 실시예에 의한 황동 도금 강판의 제조 방법으로 제조된 황동 도금 강판은 황동 색상 점수가 우수하여 표면 외관 효과가 뛰어나고 얼룩이 발생하지 않아 색상 균일도가 우수하였다.As shown in Table 1, the brass-plated steel sheet produced by the method of manufacturing a brass-plated steel sheet according to an embodiment of the present invention has excellent brass color score, excellent surface appearance effect, and excellent color uniformity due to no staining.
반면에, 기존의 복합 도금조로 제조된 비교예 1의 황동 도금 강판은 냉연 강판 자체의 상태와 전해액 조건에 따른 영향도가 크기 때문에 표면에 얼룩 무늬가 잘 발생하여 색상 균일도가 떨어지는 문제점이 있었다.On the other hand, the brass-plated steel sheet of Comparative Example 1 prepared with the conventional composite plating bath has a problem that the color uniformity is lowered due to the occurrence of a stain pattern on the surface because of the influence of the state of the cold rolled steel sheet itself and the electrolytic solution condition.
또한, 확산 열처리를 하지 않은 비교예 2의 황동 도금 강판은 황동 도금 자체가 형성되지 않았다.Further, in the brass plated steel sheet of Comparative Example 2 in which the diffusion heat treatment was not performed, the brass plating itself was not formed.
또한, 본 발명의 3수 피로인산동 농도, 구리 도금 두께, 5수 황산 아연 농도 또는 아연 도금 두께를 벗어나는 방법으로 제조된 비교예 3-11의 황동 도금 강판 역시 황동 색상 점수가 좋지 못하여 표면 외관 효과가 떨어짐을 확인하였다.In addition, the brass-plated steel sheet of Comparative Example 3-11, which was produced by the method of the present invention except for the concentration of copper scandium, the thickness of copper plating, the concentration of zinc sulfate of zinc sulfate or the thickness of zinc plating, Respectively.
본 발명을 첨부된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 기술적 보호범위는 아래의 특허청구범위에 의해서 정하여져야 할 것이다.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the technical scope of the present invention should be defined by the following claims.
Claims (7)
상기 제1 도금 단계를 거친 강판을 구리와 아연 중 상기 제1 도금 단계에서 선택된 것을 제외한 나머지로 도금하는 제2 도금 단계, 및
상기 제2 도금 단계를 거친 강판을 확산 열처리하는 단계를 포함하는 황동 도금 강판의 제조 방법.A first plating step of plating the steel sheet subjected to the pretreatment step with any one selected from copper and zinc,
A second plating step of plating the steel sheet subjected to the first plating step with the rest of the copper and zinc except those selected in the first plating step, and
The method of manufacturing a brass plated steel sheet comprising the step of diffusion heat treatment of the steel sheet subjected to the second plating step.
The method of manufacturing a brass-plated steel sheet according to claim 1, further comprising washing and treating the steel sheet after the diffusion heat treatment step.
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