KR880007803A - Chromate solution with excellent corrosion resistance - Google Patents

Chromate solution with excellent corrosion resistance Download PDF

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Publication number
KR880007803A
KR880007803A KR860011558A KR860011558A KR880007803A KR 880007803 A KR880007803 A KR 880007803A KR 860011558 A KR860011558 A KR 860011558A KR 860011558 A KR860011558 A KR 860011558A KR 880007803 A KR880007803 A KR 880007803A
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KR
South Korea
Prior art keywords
chromate solution
corrosion resistance
concentration
excellent corrosion
cro
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KR860011558A
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Korean (ko)
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KR890003813B1 (en
Inventor
박찬섭
김상현
Original Assignee
안병화
포항종합제철 주식회사
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Application filed by 안병화, 포항종합제철 주식회사 filed Critical 안병화
Priority to KR1019860011558A priority Critical patent/KR890003813B1/en
Publication of KR880007803A publication Critical patent/KR880007803A/en
Application granted granted Critical
Publication of KR890003813B1 publication Critical patent/KR890003813B1/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
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium

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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)
  • Chemical Treatment Of Metals (AREA)

Abstract

내용 없음.No content.

Description

내식성이 우수한 크로메이트(chromate) 용액Chromate solution with excellent corrosion resistance

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

Cu 이온 첨가에 따른 내식성의 변화를 나타내는 그래프이다.It is a graph which shows the change of corrosion resistance by addition of Cu ion.

Claims (1)

Na2CrO4, Na2Cr2O7, K2CrO4, K2Cr2O7, CrO3를 1종 또는 2종 이상 혼합하여 Cr 이온온도가 0.01-1mol/l로 하고, H3PO4, NaH2PO4, Na2HPO4, (NH4)H2PO4, (NH4)2HPO4등의 PO4 -3, 화합물을 1종 또는 2종이상 혼합하여 PO4 -3의 농도가 0.4-0.75mol/l로 하고, 환원제첨가에 의해 총크롬에 대한 3가(價) 크롬 농도의 비(크롬농도비)를 0.1-0.5로 하고, Cu++농도가 0.004-0.0012mol/l 되도록 수용성 구리화합물을 첨가하여서 조성된 것을 특징으로 하는 크로메이트 용액.Na 2 CrO 4 , Na 2 Cr 2 O 7 , K 2 CrO 4 , K 2 Cr 2 O 7 , CrO 3 , or a mixture of two or more thereof, the Cr ion temperature is 0.01-1 mol / l, and H 3 PO 4 , NaH 2 PO 4 , Na 2 HPO 4 , (NH 4 ) H 2 PO 4 , (NH 4 ) 2 PO 4 -3 , such as HPO 4 , a mixture of one or two or more kinds of PO 4 -3 The concentration was 0.4-0.75 mol / l, the ratio of the trivalent chromium concentration to the total chromium (chromium concentration ratio) was 0.1-0.5 by addition of a reducing agent, and the Cu ++ concentration was 0.004-0.0012 mol / l. A chromate solution characterized in that the composition is added by adding a water-soluble copper compound. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019860011558A 1986-12-30 1986-12-30 Chromate solution with an excellant corrosion resistance KR890003813B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019860011558A KR890003813B1 (en) 1986-12-30 1986-12-30 Chromate solution with an excellant corrosion resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019860011558A KR890003813B1 (en) 1986-12-30 1986-12-30 Chromate solution with an excellant corrosion resistance

Publications (2)

Publication Number Publication Date
KR880007803A true KR880007803A (en) 1988-08-29
KR890003813B1 KR890003813B1 (en) 1989-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860011558A KR890003813B1 (en) 1986-12-30 1986-12-30 Chromate solution with an excellant corrosion resistance

Country Status (1)

Country Link
KR (1) KR890003813B1 (en)

Also Published As

Publication number Publication date
KR890003813B1 (en) 1989-10-05

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