JPS55152197A - Production of electrolytic chromic-acid-treated steel plate having little reduced adhesive strength with time - Google Patents

Production of electrolytic chromic-acid-treated steel plate having little reduced adhesive strength with time

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Publication number
JPS55152197A
JPS55152197A JP5870579A JP5870579A JPS55152197A JP S55152197 A JPS55152197 A JP S55152197A JP 5870579 A JP5870579 A JP 5870579A JP 5870579 A JP5870579 A JP 5870579A JP S55152197 A JPS55152197 A JP S55152197A
Authority
JP
Japan
Prior art keywords
steel plate
treated
chromate
layer
acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5870579A
Other languages
Japanese (ja)
Other versions
JPS5910439B2 (en
Inventor
Yukinobu Higuchi
Yukio Tsukamoto
Minoru Kamata
Kazuhiro Tano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP5870579A priority Critical patent/JPS5910439B2/en
Publication of JPS55152197A publication Critical patent/JPS55152197A/en
Publication of JPS5910439B2 publication Critical patent/JPS5910439B2/en
Expired legal-status Critical Current

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  • Electrochemical Coating By Surface Reaction (AREA)

Abstract

PURPOSE: To provide the adherent can-material whose coating adhesivity is not reduced after retort treatment by a method wherein the steel plate electrolytically treated in chromic acid is freed from chromate layer by cathodizing in aqueous chromate solution under a specific condition, and is treated with high temperature water.
CONSTITUTION: A steel plate is electrodiposited with the charomate layer and the metal chromium layer in an electrolytic bath containing anhydrous chromic acid and catalytic anions such as SO4 2-, F-, etc. then washed with water so that the remaining chromate layer is adjusted to 5W50mg/m2 based on Cr. The plate is then treated with cathodizing in aqueous solution contg. chromate, bichromate or its mixture, and contg. 5g/l or less of SO4 2- concentration, at pH 3 or more, and at temperature 50°C or more. Next, the plate is surface-treated with high temperature water of 65W100°C for 0.3W10sec. The process removes SO4 2-, F-, or other anions from the chromate layer, reduces Cr6+ to Cr3+, and removes the remaining Cr6+.
COPYRIGHT: (C)1980,JPO&Japio
JP5870579A 1979-05-15 1979-05-15 Manufacturing method of electrolytic chromic acid treated steel sheet with minimal deterioration of adhesive strength over time Expired JPS5910439B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5870579A JPS5910439B2 (en) 1979-05-15 1979-05-15 Manufacturing method of electrolytic chromic acid treated steel sheet with minimal deterioration of adhesive strength over time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5870579A JPS5910439B2 (en) 1979-05-15 1979-05-15 Manufacturing method of electrolytic chromic acid treated steel sheet with minimal deterioration of adhesive strength over time

Publications (2)

Publication Number Publication Date
JPS55152197A true JPS55152197A (en) 1980-11-27
JPS5910439B2 JPS5910439B2 (en) 1984-03-08

Family

ID=13091916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5870579A Expired JPS5910439B2 (en) 1979-05-15 1979-05-15 Manufacturing method of electrolytic chromic acid treated steel sheet with minimal deterioration of adhesive strength over time

Country Status (1)

Country Link
JP (1) JPS5910439B2 (en)

Also Published As

Publication number Publication date
JPS5910439B2 (en) 1984-03-08

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