GB665993A - Process and composition for producing a dyeable corrosion-resistant coating on zinc and zinc alloys - Google Patents
Process and composition for producing a dyeable corrosion-resistant coating on zinc and zinc alloysInfo
- Publication number
- GB665993A GB665993A GB16204/48A GB1620448A GB665993A GB 665993 A GB665993 A GB 665993A GB 16204/48 A GB16204/48 A GB 16204/48A GB 1620448 A GB1620448 A GB 1620448A GB 665993 A GB665993 A GB 665993A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- zinc
- composition
- per cent
- water
- 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
- C23C22/82—After-treatment
- C23C22/84—Dyeing
-
- 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)
- Chemical Treatment Of Metals (AREA)
- Chemically Coating (AREA)
Abstract
A composition for producing a corrosion-resistant coating having good dye affinity on the surface of zinc and zinc-rich alloys comprises chromic acid or a water-soluble salt thereof in an amount equivalent to 145-155 grams per litre of chromium trioxide, lactic acid or a water-soluble lactate in an amount equivalent to 0.1-9 grams per litre of lactic acid, a strong mineral acid, e.g. sulphuric, nitric, hydrochloric or phosphoric, in an amount sufficient to impart a pH of 0.65-1.5 to the composition, and the balance water. After treatment and rinsing, the surface be dyed; and after further rinsing, dried at 140-150 DEG F, and cured at 150-250 DEG F for about 15 minutes.ALSO:A composition for producing a corrosion-resistant coating having good dye affinity on the surface of zinc and zinc-rich alloys comprises chromic acid or a water-soluble salt thereof in an amount equivalent to 145-155 grams per litre of chromium trioxide, lactic acid or a water-soluble lactate in an amount equivalent to 0.1-9 grams per litre of lactic acid, a strong mineral acid, e.g. sulphuric, nitric, hydrochloric or phosphoric, in amount sufficient to impart a pH of 0.65-1.5 to the composition, and the balance water. After treatment and rinsing, the surface may be dyed. Prior to treatment the surface may be cleaned with 1 per cent caustic soda solution at 200 DEG F, 0.5 per cent of sodium hexametaphosphate or sodium oleyl alcohol sulphonate or both being added, if desired. The alkali may be neutralized by washing with 1-2 per cent sulphuric acid which may contain naphthaline sulphonic acid. After dyeing and rinsing, the articles may be dried at 140-150 DEG F and cured at 150-250 DEG F for about 15 minutes. In one example, the cleaning stage is preceded by precleaning in a solution containing 0.5 per cent sodium lauryl sulphonate and 0.25 per cent sodium hexametaphosphate at 200-210 DEG F and pretreated with 3 per cent nitric acid at 75 DEG F.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US665993XA | 1947-07-23 | 1947-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB665993A true GB665993A (en) | 1952-02-06 |
Family
ID=22070523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16204/48A Expired GB665993A (en) | 1947-07-23 | 1948-06-16 | Process and composition for producing a dyeable corrosion-resistant coating on zinc and zinc alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB665993A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000018983A1 (en) * | 1998-09-28 | 2000-04-06 | Chemetall Gmbh | Preparation of workpieces for cold forming |
-
1948
- 1948-06-16 GB GB16204/48A patent/GB665993A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000018983A1 (en) * | 1998-09-28 | 2000-04-06 | Chemetall Gmbh | Preparation of workpieces for cold forming |
| US6482273B1 (en) | 1998-09-28 | 2002-11-19 | Chemetall Gmbh | Preparation of workpieces for cold forming |
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