JPS6465272A - Highly corrosion-resistant chromate treatment for galvanized steel sheet - Google Patents
Highly corrosion-resistant chromate treatment for galvanized steel sheetInfo
- Publication number
- JPS6465272A JPS6465272A JP22156587A JP22156587A JPS6465272A JP S6465272 A JPS6465272 A JP S6465272A JP 22156587 A JP22156587 A JP 22156587A JP 22156587 A JP22156587 A JP 22156587A JP S6465272 A JPS6465272 A JP S6465272A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- galvanized steel
- aqueous solution
- elution
- chromic 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
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
- C23C22/74—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 for obtaining burned-in conversion coatings
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 form a highly corrosion-resistant chromate film hardly causing the elution of sexivalent Cr and the sticking of fingerprints, by applying an aqueous solution of chromic acid which contains SiO2 and PO4<3-> and in which the mole ratio of trivalent Cr to the total Cr is specified to a galvanized steel sheet in the prescribed Cr coating weight and then subjecting the above sheet to drying by heating without water washing. CONSTITUTION:An aqueous solution of chromic acid in high concentration which contains H3BO3 besides SiO2 and PO4<3-> and in which the mole ratio of trivalent Cr to the total Cr is regulated to 0.40-0.55 is applied to a galvanized steel sheet by 30-120mg/m<2> Cr coating weight. Subsequently, the galvanized steel sheet to which the aqueous solution of chromic acid is applied is subjected, without water washing, to drying by heating to 150-250 deg.C sheet temp. By this method, the galvanized steel sheet on which the chromate film improved in the elution of sexivalent Cr and fingerprint sticking characteristic and practically free from elution even if unaged is formed can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221565A JPH0637706B2 (en) | 1987-09-04 | 1987-09-04 | High corrosion resistance chromate treatment method for galvanized steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221565A JPH0637706B2 (en) | 1987-09-04 | 1987-09-04 | High corrosion resistance chromate treatment method for galvanized steel sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6465272A true JPS6465272A (en) | 1989-03-10 |
JPH0637706B2 JPH0637706B2 (en) | 1994-05-18 |
Family
ID=16768722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62221565A Expired - Fee Related JPH0637706B2 (en) | 1987-09-04 | 1987-09-04 | High corrosion resistance chromate treatment method for galvanized steel sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0637706B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03219087A (en) * | 1989-09-27 | 1991-09-26 | Nippon Parkerizing Co Ltd | Chromate coating solution for zinc-plated steel sheet |
KR100694587B1 (en) * | 2005-06-08 | 2007-03-13 | 최동섭 | Wall Structure Using Precast Concrete Panel with Multi Rib Rows |
JP2007305605A (en) * | 2007-08-17 | 2007-11-22 | Ngk Spark Plug Co Ltd | Gasket for spark plug, the spark plug and manufacturing method of the gasket for spark plug |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5410531A (en) * | 1977-06-27 | 1979-01-26 | Zeniya Kaiyou Saabisu Kk | Device for stopping floating garbage at inlet port |
JPS59153884A (en) * | 1983-02-19 | 1984-09-01 | Nisshin Steel Co Ltd | Zinc or zinc alloy plated steel sheet for base metal for coating |
JPS60218483A (en) * | 1984-03-23 | 1985-11-01 | パーカー・ケミカル・カンパニー | Aqueous composition for treating metal surface and treatment |
-
1987
- 1987-09-04 JP JP62221565A patent/JPH0637706B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5410531A (en) * | 1977-06-27 | 1979-01-26 | Zeniya Kaiyou Saabisu Kk | Device for stopping floating garbage at inlet port |
JPS59153884A (en) * | 1983-02-19 | 1984-09-01 | Nisshin Steel Co Ltd | Zinc or zinc alloy plated steel sheet for base metal for coating |
JPS60218483A (en) * | 1984-03-23 | 1985-11-01 | パーカー・ケミカル・カンパニー | Aqueous composition for treating metal surface and treatment |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03219087A (en) * | 1989-09-27 | 1991-09-26 | Nippon Parkerizing Co Ltd | Chromate coating solution for zinc-plated steel sheet |
KR100694587B1 (en) * | 2005-06-08 | 2007-03-13 | 최동섭 | Wall Structure Using Precast Concrete Panel with Multi Rib Rows |
JP2007305605A (en) * | 2007-08-17 | 2007-11-22 | Ngk Spark Plug Co Ltd | Gasket for spark plug, the spark plug and manufacturing method of the gasket for spark plug |
Also Published As
Publication number | Publication date |
---|---|
JPH0637706B2 (en) | 1994-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |