JPS6487783A - Production of surface-treated steel sheet having two chromate-layer coating film - Google Patents
Production of surface-treated steel sheet having two chromate-layer coating filmInfo
- Publication number
- JPS6487783A JPS6487783A JP24407587A JP24407587A JPS6487783A JP S6487783 A JPS6487783 A JP S6487783A JP 24407587 A JP24407587 A JP 24407587A JP 24407587 A JP24407587 A JP 24407587A JP S6487783 A JPS6487783 A JP S6487783A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- resin
- inorg
- contg
- soln
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/76—Applying the liquid by spraying
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
PURPOSE:To produce the title steel sheet having beautiful appearance, uniformly coated, and having excellent corrosion resistance and coating performance by applying an inorg. chromating layer and a coating layer thereon by the electrostatic atomization of a Cr-contg. resin soln. having specified composition, viscosity, and electrical conductivity in a specified quantity, and heating the layers. CONSTITUTION:An inorg. chromating layer is provided on a surface-treated steel sheet at 5-150mg/m<2> per one side, expressed in terms of the metallic Cr, by the electrolysis or coating of the aq. soln. of an inorg. Cr compd. consisting essentially of Cr<6+>. A soln. contg. 50-400g/l resin and a Cr component whose ratio to the resin is controlled to 1/50-1/1 and having 3-50 centipoise viscosity and 2-30ms/cm electrical conductivity is applied on the chromating layer by electrostatic atomization. In this case, the resin-contg. chromating layer is provided at the Cr deposition rate of 3-180mg/m<2> per one side, and then heated at 50-350 deg.C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24407587A JPS6487783A (en) | 1987-09-30 | 1987-09-30 | Production of surface-treated steel sheet having two chromate-layer coating film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24407587A JPS6487783A (en) | 1987-09-30 | 1987-09-30 | Production of surface-treated steel sheet having two chromate-layer coating film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6487783A true JPS6487783A (en) | 1989-03-31 |
JPH0372714B2 JPH0372714B2 (en) | 1991-11-19 |
Family
ID=17113362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24407587A Granted JPS6487783A (en) | 1987-09-30 | 1987-09-30 | Production of surface-treated steel sheet having two chromate-layer coating film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6487783A (en) |
-
1987
- 1987-09-30 JP JP24407587A patent/JPS6487783A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0372714B2 (en) | 1991-11-19 |
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