GB617083A - Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces - Google Patents
Improvements in the production of corrosion resistant coatings on zinc and cadmium surfacesInfo
- Publication number
- GB617083A GB617083A GB4565/46A GB456546A GB617083A GB 617083 A GB617083 A GB 617083A GB 4565/46 A GB4565/46 A GB 4565/46A GB 456546 A GB456546 A GB 456546A GB 617083 A GB617083 A GB 617083A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- acid
- production
- corrosion resistant
- resistant coatings
- 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.)
- Expired
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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/26—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also organic compounds
- C23C22/27—Acids
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)
- Battery Electrode And Active Subsutance (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Zinc and cadmium surfaces are given a corrosion-resistant coating by treatment with an aqueous acidic solution consisting of chromic acid or a salt thereof, formic acid or a formate, nitric acid or a salt thereof, until a visible coating is formed, the sulphuric acid or sulphate being present in amount sufficient to produce a bronze colour. A suitable solution contains sodium bichromate 30-70 gm./l.; formic acid 30-60 cc./l.; zinc nitrate 10-30 gm./1.; and sulphuric acid 4-10 cc./1.; the pH range being 1-3.4. Temperatures of 33-212 DEG F., and preferably 80-90 DEG F. may be used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US617083XA | 1945-03-21 | 1945-03-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB617083A true GB617083A (en) | 1949-02-01 |
Family
ID=22037581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4565/46A Expired GB617083A (en) | 1945-03-21 | 1946-02-13 | Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB617083A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022072857A1 (en) * | 2020-10-02 | 2022-04-07 | Solugen, Inc. | Compositions for corrosion inhibition |
-
1946
- 1946-02-13 GB GB4565/46A patent/GB617083A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022072857A1 (en) * | 2020-10-02 | 2022-04-07 | Solugen, Inc. | Compositions for corrosion inhibition |
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