GB990446A - Improvements in and relating to the treatment of metals - Google Patents
Improvements in and relating to the treatment of metalsInfo
- Publication number
- GB990446A GB990446A GB29535/63A GB2953563A GB990446A GB 990446 A GB990446 A GB 990446A GB 29535/63 A GB29535/63 A GB 29535/63A GB 2953563 A GB2953563 A GB 2953563A GB 990446 A GB990446 A GB 990446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- trichloroethylene
- tertiary
- solution
- perchloroethylene
- 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
- C23C22/02—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 non-aqueous solutions
- C23C22/04—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 non-aqueous solutions containing hexavalent chromium compounds
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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A metal treating solution comprising a chlorinated hydrocarbon solvent containing dissolved therein chromic acid (e.g. upwards from 0.02 weight per cent of CrO3), a tertiary alcohol containing 4-20 carbon atoms (e.g. at least 2 weight per cent), and zinc fluoride or zinc oxide (e.g. upwards from 0.002 weight per cent) gives higher corrosion resistance and improved bonding of paints (e.g. alkyd baking enamel) to Al, Al Alloy, Fe, steel and Zn. Specified chlorinated hydrocarbon solvents are trichloroethylene, perchloroethylene, CCl4, CHCl3, CH3CCl3, CH2Cl2 and mixtures thereof. Specified tertiary alcohols are tertiary butanol, tertiary amyl alcohol, 1,1-dimethyl 2,2-dichloropropanol, 1,1-2,2-tetramethyl propanol and triphenyl carbinol. Metal may be treated by (a) wire brushing or sand blasting, (b) degreasing with trichloroethylene or perchloroethylene, (c) immersing in the chromating solution, e.g. under reflux conditions, and (d) irradiating with ultra-violet light, heating or exposing to a reducing gas such as H2, H2S, HCHO, SO2 or H2O2 to set the chromate coating. Prior to chromatizing, the metal may be phosphatized. A specified phosphatizing solution contains 94.3% trichloroethylene, 5% pentanol-1, 0.2% dinitrotoluene, 0.3% phosphoric acid (85%) which may contain 6 gms. ZnO per 100 mls. phosphoric acid. Another phosphatizing solution is of trichloroethylene containing 5% amyl alcohol and 0.2% phosphoric acid. Both solutions are used at 87 DEG C. All percentages are by weight.ALSO:A metal (e.g. Al, Al alloy, Fe, steel or Zn) which has been chromated (see Division C7) is sprayed with an alkyd baking enamel consisting of: - pigment urea-formaldehyde-butyl alcohol resin 55% castor oil modified glyceryl phthalate hydrocarbon solvent candelilla wax dispersion tertiary-butyl alcohol. Prior to chromating the metal may be phosphated (see Division C7). Typically, metal may be treated by (a) wire brushing or sand blasting, (b) degreasing with trichloroethylene or perchloroethylene, (c) immersing in chromating solution, (d) irradiating with ultra-violet light, heating or exposing to a reducing gas such as H2, H2S, HCHO, SO2 or H2O2 to set the chromate coating, (e) applying the alkyd baking enamel, and (f) baking.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21271262A | 1962-07-26 | 1962-07-26 | |
| US287774A US3285788A (en) | 1963-06-14 | 1963-06-14 | Anhydrous chromic acid solution and process of treating metal therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB990446A true GB990446A (en) | 1965-04-28 |
Family
ID=26907394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29535/63A Expired GB990446A (en) | 1962-07-26 | 1963-07-25 | Improvements in and relating to the treatment of metals |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE635431A (en) |
| CH (1) | CH449377A (en) |
| DE (1) | DE1521920B2 (en) |
| DK (1) | DK103651C (en) |
| GB (1) | GB990446A (en) |
| NL (1) | NL295602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2249108A (en) * | 1990-09-18 | 1992-04-29 | Nippon Dacro Shamrock Co | Phosphating compositions containing zinc ions and a polar or non-polar solvent |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6167773A (en) * | 1984-09-11 | 1986-04-07 | Nippon Dakuro Shamrock:Kk | Surface treatment of metal |
-
1963
- 1963-07-22 NL NL295602D patent/NL295602A/en unknown
- 1963-07-25 DK DK356263AA patent/DK103651C/en active
- 1963-07-25 CH CH927763A patent/CH449377A/en unknown
- 1963-07-25 BE BE635431D patent/BE635431A/en unknown
- 1963-07-25 DE DE19631521920 patent/DE1521920B2/en active Pending
- 1963-07-25 GB GB29535/63A patent/GB990446A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2249108A (en) * | 1990-09-18 | 1992-04-29 | Nippon Dacro Shamrock Co | Phosphating compositions containing zinc ions and a polar or non-polar solvent |
| GB2249108B (en) * | 1990-09-18 | 1995-01-11 | Nippon Dacro Shamrock Co | Phosphatizing compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| DK103651C (en) | 1966-01-31 |
| BE635431A (en) | 1963-11-18 |
| CH449377A (en) | 1967-12-31 |
| DE1521920A1 (en) | 1970-08-20 |
| DE1521920B2 (en) | 1971-01-21 |
| NL295602A (en) | 1965-05-10 |
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