KR970043318A - Manufacturing method of zinc-iron alloy electroplating steel sheet with excellent corrosion resistance and workability after painting - Google Patents

Manufacturing method of zinc-iron alloy electroplating steel sheet with excellent corrosion resistance and workability after painting Download PDF

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Publication number
KR970043318A
KR970043318A KR1019950046827A KR19950046827A KR970043318A KR 970043318 A KR970043318 A KR 970043318A KR 1019950046827 A KR1019950046827 A KR 1019950046827A KR 19950046827 A KR19950046827 A KR 19950046827A KR 970043318 A KR970043318 A KR 970043318A
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KR
South Korea
Prior art keywords
plating
zinc
iron
layer
iron alloy
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KR1019950046827A
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Korean (ko)
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KR100244631B1 (en
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조용균
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김종진
포항종합제철 주식회사
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Priority to KR1019950046827A priority Critical patent/KR100244631B1/en
Publication of KR970043318A publication Critical patent/KR970043318A/en
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Publication of KR100244631B1 publication Critical patent/KR100244631B1/en

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

본 발명은 자동차소재로 사용되는 아연-철 합금 전기도금강판에 관한 것으로여러개의 셀로 구성된 연속도금설비를 사용하여 아연-철 합금의 전기도금시 도금액조성을 이원관리하여 적은 전류밀도 차이에서도 하층도금층은 철 함량을 낮게 유지하고 상층은 철함량을 높게 유지하므로서, 도금중에 아크스폿 발생이 없으면서 아연-철 합금전기도금강판의 도장후 내식성 및 가공성을 향상시킬수 있는 방법을 제공하고자 하는데, 그 목적이 있다. 상기한 목적을 달성하기 위한 본 발명은 강판의 한면을 도금 하는데 적어도 2개 이상의 도금셀을 가진, 연속식, 전기도금 설비를 사용하여 강판상에 아연-철 합금을 도금하는 방법에 있어서, 철과 아연이온농도의 합이 30-150g/1의 범위인 도금액중 철과 아연이온의 농도비를 0.08-0.3의 범위로 유지하여 하층도금층을 형성한 다음, 상기 도금액중 철과 아연 이온의 농도비를 0.15-0.5의 법위로 유지하여 상층 도금층을 형성하고, 상기 상하층 도금층 형성시 하층도금층과 상층 도금층의 도금액중 철과 아연이온의 농도비 차이가 0.02-0.4범위인 것을 포함하여 이루어지는 도장후 내식성 및 가공성이 우수한 아연-철 합금 전기도금 강판 제조방법에 관한 것을 그 요지로 한다.The present invention relates to a zinc-iron alloy electroplating steel sheet used as an automobile material, and the lower plating layer is made of iron even in a small current density difference by dually managing the plating solution composition during electroplating of zinc-iron alloy using a continuous plating facility composed of several cells. The purpose of the present invention is to provide a method of improving the corrosion resistance and workability after coating of zinc-iron alloy electroplated steel sheets while maintaining a low content and maintaining a high iron content in the upper layer without arc spots during plating. The present invention for achieving the above object is a method of plating a zinc-iron alloy on a steel plate using a continuous, electroplating equipment having at least two plating cells to plate one side of the steel sheet, the iron and The concentration ratio of iron and zinc ions in the plating solution in which the sum of the zinc ions concentrations is in the range of 30-150 g / 1 is maintained in the range of 0.08-0.3 to form a lower plating layer, and then the concentration ratio of iron and zinc ions in the plating solution is 0.15-. The upper layer plating layer is formed by maintaining at a level of 0.5, and the difference between the concentration ratios of iron and zinc ions in the plating solution of the lower layer plating layer and the upper layer plating layer when forming the upper layer plating layer is in the range of 0.02-0.4. The summary relates to a method for producing a zinc-iron alloy electroplated steel sheet.

Description

도장후 내식성 및 가공성이 우수한 아연-철 합금 전기도금 강판 제조방법Manufacturing method of zinc-iron alloy electroplating steel sheet with excellent corrosion resistance and workability after painting

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 연속식 아연-철 합금 전기 도금라인을 나타낸 개략도로서 (가)도는 종전의 방법이 적용되는 경우이고 (나)는 본 발명의 방법이 적용되는 경우이다.1 is a schematic diagram showing a continuous zinc-iron alloy electroplating line, (a) is a case where the previous method is applied and (b) is a case where the method of the present invention is applied.

Claims (1)

강판의 한면을 도금 하는데 적어도 2개 이상의 도금셀을 가진, 연속식, 전기도금 설비를 사용하여 강판상에 아연-철 합금을 도금하는 방법에 있어서, 철과 아연이온농도의 합이 30-150g/1의 범위인 도금액중 철과 아연이온의 농도비를 0.08-0.3의 범위로 유지하여 하층도금층을 형성한 다음, 상기 도금액중 철과 아연 이온의 농도비를 0.15-0.5의 법위로 유지하여 상층 도금층을 형성하고, 상기 상하층 도금층 형성시 하층도금층과 상층 도금층의 도금액중 철과 아연이온의 농도비 차이가 0.02-0.4범위인 것을 포함하여 이루어지는 도장후 내식성 및 가공성이 우수한 아연-철 합금 전기도금 강판 제조방법.In a method of plating a zinc-iron alloy on a steel plate using a continuous electroplating apparatus having at least two plating cells for plating one side of the steel plate, the sum of iron and zinc ion concentrations is 30-150 g / The lower plating layer was formed by maintaining the concentration ratio of iron and zinc ions in the plating solution in the range of 1 to 0.08-0.3, and the upper plating layer was formed by maintaining the concentration ratio of iron and zinc ions in the plating solution at a law of 0.15-0.5. And, when forming the upper and lower plating layer, the difference between the concentration ratio of iron and zinc ions in the plating solution of the lower plating layer and the upper plating layer ranges from 0.02-0.4.
KR1019950046827A 1995-12-05 1995-12-05 Zn-fe alloy electro-plating steel plate manufacturing method with superior corrosion resistence and formability after painting KR100244631B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950046827A KR100244631B1 (en) 1995-12-05 1995-12-05 Zn-fe alloy electro-plating steel plate manufacturing method with superior corrosion resistence and formability after painting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950046827A KR100244631B1 (en) 1995-12-05 1995-12-05 Zn-fe alloy electro-plating steel plate manufacturing method with superior corrosion resistence and formability after painting

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KR970043318A true KR970043318A (en) 1997-07-26
KR100244631B1 KR100244631B1 (en) 2000-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160074704A (en) 2014-12-17 2016-06-29 주식회사 포스코 Plating steel sheet and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160074704A (en) 2014-12-17 2016-06-29 주식회사 포스코 Plating steel sheet and manufacturing method thereof

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KR100244631B1 (en) 2000-03-02

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