KR940014913A - Manufacturing method of galvanized steel sheet with excellent surface gloss - Google Patents

Manufacturing method of galvanized steel sheet with excellent surface gloss Download PDF

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Publication number
KR940014913A
KR940014913A KR1019920026526A KR920026526A KR940014913A KR 940014913 A KR940014913 A KR 940014913A KR 1019920026526 A KR1019920026526 A KR 1019920026526A KR 920026526 A KR920026526 A KR 920026526A KR 940014913 A KR940014913 A KR 940014913A
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KR
South Korea
Prior art keywords
steel sheet
galvanized steel
manufacturing
plating
pickling
Prior art date
Application number
KR1019920026526A
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Korean (ko)
Other versions
KR950005352B1 (en
Inventor
김명수
안덕수
채희명
Original Assignee
박득표
포항종합제철 주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019920026526A priority Critical patent/KR950005352B1/en
Publication of KR940014913A publication Critical patent/KR940014913A/en
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Publication of KR950005352B1 publication Critical patent/KR950005352B1/en

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/22—Collecting emitted gases

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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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

본 발명은, 연속전기아연도금강판의 표면광택성을 향싱시키는 방법에 관한 것으로서, 도금전 처리과정인 산세공정에 있어서, 염산농도를 20~25wt%로 하고, 산세시간을 3~24초로 하는 것을 특징으로 하는 아연도금강판제조방법을 제공하기 위한 것이다. 본 발명의 방법에 의하면, 도금전 강판의 최대조도가 7㎛이하가 되도록 하여, 도금과정에서의 강판의 오목한 부분과 볼록한 부분사이의 전류밀도차가 감소하게 되고, 결과적으로 원자밀도가 높은 아연의 기저면의 우선배향도가 8이상 균일하게 우선배향될 수 있어, 도금강판의 광택성이 현저히 향상되게 된다.The present invention relates to a method for enhancing the surface glossiness of a continuous galvanized steel sheet, wherein in the pickling process, which is a pre-plating treatment, the concentration of hydrochloric acid is set to 20 to 25 wt% and the pickling time is set to 3 to 24 seconds. It is to provide a galvanized steel sheet manufacturing method characterized in that. According to the method of the present invention, the maximum roughness of the steel sheet before plating is 7 µm or less, so that the current density difference between the concave and convex portions of the steel sheet during the plating process is reduced, and as a result, the base surface of zinc having a high atomic density The preferred orientation of can be uniformly preferentially arranged over 8, so that the glossiness of the plated steel sheet is remarkably improved.

Description

표면광택성이 우수한 전기아연도금강판의 제조방법Manufacturing method of galvanized steel sheet with excellent surface gloss

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

제3도는 염산농도 및 산세시간을 변화시켜 산세한 후 염산계 도금욕에서 도금한 아연결정면들의 우선배향성을 나타낸 그래프.3 is a graph showing the preferential orientation of zinc crystal surfaces plated in a hydrochloric acid plating bath after pickling by varying the concentration of hydrochloric acid and the pickling time.

제4도는 15wt% 염산에서 15초동안 산세한 후 아연도금한 시편(가)과 25wt% 염산에서 15초동안 산세한 후 아연도금한 시편(나)의 확대조직사진.4 is an enlarged structure photograph of specimens (a) galvanized after pickling in 15 wt% hydrochloric acid for 15 seconds and galvanized after pickling in 25 wt% hydrochloric acid for 15 seconds.

제7도는 염산농도 및 산세시간을 변화시켜 산세한 후 에틸렌글리콜계 결정립 미세화제가 0.08ml/l첨가된 염산계 도금욕에서 도금한 후 도금층의 광택도를 측정한 그래프.7 is a graph measuring the glossiness of a plated layer after plating by changing the concentration of hydrochloric acid and pickling time, and then plating in a hydrochloric acid plating bath containing 0.08 ml / l of ethylene glycol-based grain refining agent.

제8도는 15wt% 염산에서 15초동안 산세한 후 에틸렌 글리콜계 결정립 미세화제가 첨가된 도금욕에서 아연도금한 시편(가)과 25wt% 염산에서 15초동안 산세한 후 에틸렌 글리콜계 결정립 미세화제가 첨가된 도금욕에서 아연도금한 시편(나)의 확대조직사진.FIG. 8 shows that the sample is pickled in 15 wt% hydrochloric acid for 15 seconds and galvanized in a plating bath to which ethylene glycol-based grain refiner is added. Enlarged photograph of specimens (b) galvanized in plating bath.

Claims (1)

연속아연전기도금강판 제조공정의 도금전 처리과정인 산세공정에 있어서, 염산농도를 20~25wt%로 하고 산세시간을 3~24초로 하는 것을 특징으로 하는 아연도금강판 제조방법.A method of manufacturing a galvanized steel sheet, characterized in that the hydrochloric acid concentration is 20 to 25 wt% and the pickling time is 3 to 24 seconds in the pickling process, which is a pre-plating process of the continuous zinc electroplating steel sheet manufacturing process. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920026526A 1992-12-30 1992-12-30 Method for making a electro-zinc coating steel sheet with an excellent surface brightness KR950005352B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920026526A KR950005352B1 (en) 1992-12-30 1992-12-30 Method for making a electro-zinc coating steel sheet with an excellent surface brightness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920026526A KR950005352B1 (en) 1992-12-30 1992-12-30 Method for making a electro-zinc coating steel sheet with an excellent surface brightness

Publications (2)

Publication Number Publication Date
KR940014913A true KR940014913A (en) 1994-07-19
KR950005352B1 KR950005352B1 (en) 1995-05-23

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KR1019920026526A KR950005352B1 (en) 1992-12-30 1992-12-30 Method for making a electro-zinc coating steel sheet with an excellent surface brightness

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100428019B1 (en) * 2000-12-13 2004-04-30 현대하이스코 주식회사 Manufacturing process of highly qualified, surface-treated zinc electroplated steel sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100428019B1 (en) * 2000-12-13 2004-04-30 현대하이스코 주식회사 Manufacturing process of highly qualified, surface-treated zinc electroplated steel sheet

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KR950005352B1 (en) 1995-05-23

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