JPS5757894A - Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging - Google Patents

Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging

Info

Publication number
JPS5757894A
JPS5757894A JP13172280A JP13172280A JPS5757894A JP S5757894 A JPS5757894 A JP S5757894A JP 13172280 A JP13172280 A JP 13172280A JP 13172280 A JP13172280 A JP 13172280A JP S5757894 A JPS5757894 A JP S5757894A
Authority
JP
Japan
Prior art keywords
chromate
steel plate
aging
bonding strength
strength due
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.)
Pending
Application number
JP13172280A
Other languages
Japanese (ja)
Inventor
Yukinobu Higuchi
Yukio Tsukamoto
Minoru Kamata
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 JP13172280A priority Critical patent/JPS5757894A/en
Publication of JPS5757894A publication Critical patent/JPS5757894A/en
Pending legal-status Critical Current

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  • Electrochemical Coating By Surface Reaction (AREA)

Abstract

PURPOSE: To minimize the deterioration in the bonding strength due to aging by combinedly carrying out cathodic electrolysis in an aqueous soln. of chromate or dichromate and treatment with hot water.
CONSTITUTION: Electrolytic chromate treatment is carried out using a steel plate as a cathode in an aqueous soln. of chromic anhydride, chromate or dichromate to obtain an electrolytically chromate treated steel plate having a chromate coate as at least its surface layer. The amount of the chromate coat of this steel plate is regulated to 5W50mg/m2 in an electrolytic chromate treatment bath, and the plate is washed as requred. Cathodic electrolysis is then carried out with ≥2.5C/dm3 electricity as ≤20A/dm2 current density in an aqueous soln. of chromic anhydride contg. F- in 1/≤10 ratio of F-/Cr+6. Finally, the plate is treated with hot water at 60W100°C and ≥4pH for 0.3W10sec.
COPYRIGHT: (C)1982,JPO&Japio
JP13172280A 1980-09-24 1980-09-24 Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging Pending JPS5757894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13172280A JPS5757894A (en) 1980-09-24 1980-09-24 Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13172280A JPS5757894A (en) 1980-09-24 1980-09-24 Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging

Publications (1)

Publication Number Publication Date
JPS5757894A true JPS5757894A (en) 1982-04-07

Family

ID=15064666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13172280A Pending JPS5757894A (en) 1980-09-24 1980-09-24 Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging

Country Status (1)

Country Link
JP (1) JPS5757894A (en)

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