JPS56169796A - Production of electrolytically chromated steel sheet - Google Patents
Production of electrolytically chromated steel sheetInfo
- Publication number
- JPS56169796A JPS56169796A JP7080480A JP7080480A JPS56169796A JP S56169796 A JPS56169796 A JP S56169796A JP 7080480 A JP7080480 A JP 7080480A JP 7080480 A JP7080480 A JP 7080480A JP S56169796 A JPS56169796 A JP S56169796A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- sulfuric
- chromium oxide
- electrolytically chromated
- fluoracid
- 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
Links
Landscapes
- Electrochemical Coating By Surface Reaction (AREA)
Abstract
PURPOSE: To produce an electrolytically chromated steel sheet excellent in paint adhesiveness and resistance to chronological retort deterioration, by treating an electrolytically chromated steel sheet with a fluorine ion-contg. acidic water solution and then with a chromate electrolyte free of sulfuric radicals.
CONSTITUTION: The surface of a steel sheet is subjected to a conventional electrolytic chromating treatment in a one-liquid method, to form an under coat of metallic chromium and an upper coat of hydrous chromium oxide at once. The surface is then treated in an aqueous solution containing a fluoracid only or a fluoracid and a fluoride, adjusted at a concentration of 0.1W10g/l and pH4 or less, but not containing any sulfuric radical, to reduce sulfuric radicals in the hydrous chromium oxide layer to a substantial extent. Thereafter, the treated steel is cathodically electrolyzed with use of a chromate electrolyte mainly composed of anhydrous chromic acid free of a sulfuric radical additive, to form a hydrous chromium oxide layer.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7080480A JPS56169796A (en) | 1980-05-29 | 1980-05-29 | Production of electrolytically chromated steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7080480A JPS56169796A (en) | 1980-05-29 | 1980-05-29 | Production of electrolytically chromated steel sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56169796A true JPS56169796A (en) | 1981-12-26 |
JPS6311438B2 JPS6311438B2 (en) | 1988-03-14 |
Family
ID=13442097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7080480A Granted JPS56169796A (en) | 1980-05-29 | 1980-05-29 | Production of electrolytically chromated steel sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56169796A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04304473A (en) * | 1991-04-01 | 1992-10-27 | Mita Ind Co Ltd | Automatic document feeder |
-
1980
- 1980-05-29 JP JP7080480A patent/JPS56169796A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6311438B2 (en) | 1988-03-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5770291A (en) | Highly corrosion resistant surface treated steel and preparation thereof | |
EP0149720B1 (en) | Process for after passivating phosphated metal surfaces using titanium and/or manganese and/or cobalt and/or nickel and/or copper cations containing solutions | |
JPS55131198A (en) | Electrolytic chromic acid treating steel sheet for adhesion can | |
US3772165A (en) | Method of treating surfaces of steel products | |
US3032487A (en) | Electrolytic treatment of ferrous metal surfaces | |
JPS56169796A (en) | Production of electrolytically chromated steel sheet | |
GB1305636A (en) | ||
JPS57177998A (en) | Production of tin-free steel plate | |
JPS56169788A (en) | Steel sheet useful as welded can | |
CN101353811A (en) | Method for reducing tin plate sheet surface hexavalent chromium amount | |
DE2350994B2 (en) | Method and electrolyte for increasing the hardness of a porous coating | |
JPS5735699A (en) | Production of chrome plated steel plate of superior adhesiveness | |
JPS57192295A (en) | Surface treated steel sheet of excellent painting property | |
JPS5757893A (en) | Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging | |
JPS57188663A (en) | Improvement for corrosion resistance of zinc plating | |
JPS5629691A (en) | Preparation of electrolyzed chromate treated steel plate with excellent wet adhesiveness | |
JPS5735698A (en) | Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting | |
JPS5726197A (en) | Surface treatment of stainless steel | |
JPS5729595A (en) | Formation of colored film of aluminum | |
JPS55107798A (en) | Preparation of electrolytic chromate treated steel sheet | |
JPS57192293A (en) | Manufacture of surface treated steel sheet of excellent paint adherence | |
JPS644494A (en) | Surface treatment of stainless steel | |
JPS55152197A (en) | Production of electrolytic chromic-acid-treated steel plate having little reduced adhesive strength with time | |
JPS5499742A (en) | After-treating method for electrically chromate treated steel sheet | |
SU901360A1 (en) | Method of thickening porous inorganic coatings |