JPS5757893A - 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
JPS5757893A
JPS5757893A JP13172180A JP13172180A JPS5757893A JP S5757893 A JPS5757893 A JP S5757893A JP 13172180 A JP13172180 A JP 13172180A JP 13172180 A JP13172180 A JP 13172180A JP S5757893 A JPS5757893 A JP S5757893A
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
JP13172180A
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 JP13172180A priority Critical patent/JPS5757893A/en
Publication of JPS5757893A publication Critical patent/JPS5757893A/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 coat 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 required. Cathodic electrolysis is then carried out with ≥2.5C/dm3 electricity in an aqueous soln. of chromate or dichromate contg. F- in 1/≤40 ratio of F-/Cr+6 and no free chromic acid. Finally, the plate is treated with hot water at 60W100°C and ≥4pH for 0.3W10sec.
COPYRIGHT: (C)1982,JPO&Japio
JP13172180A 1980-09-24 1980-09-24 Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging Pending JPS5757893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13172180A JPS5757893A (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
JP13172180A JPS5757893A (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
JPS5757893A true JPS5757893A (en) 1982-04-07

Family

ID=15064642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13172180A Pending JPS5757893A (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) JPS5757893A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01219194A (en) * 1988-02-27 1989-09-01 Nkk Corp Pretreatment of electrolytically chromated steel sheet
JPH02111899A (en) * 1988-10-19 1990-04-24 Toyo Kohan Co Ltd Production of electrolytically chromated steel sheet having excellent weldability
JP2007175195A (en) * 2005-12-27 2007-07-12 Heiwa Corp Game machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01219194A (en) * 1988-02-27 1989-09-01 Nkk Corp Pretreatment of electrolytically chromated steel sheet
JPH02111899A (en) * 1988-10-19 1990-04-24 Toyo Kohan Co Ltd Production of electrolytically chromated steel sheet having excellent weldability
JPH0527720B2 (en) * 1988-10-19 1993-04-22 Toyo Kohan Co Ltd
JP2007175195A (en) * 2005-12-27 2007-07-12 Heiwa Corp Game machine

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