GB459130A - Improvements in methods for stripping coatings from coated metal articles - Google Patents
Improvements in methods for stripping coatings from coated metal articlesInfo
- Publication number
- GB459130A GB459130A GB1515035A GB1515035A GB459130A GB 459130 A GB459130 A GB 459130A GB 1515035 A GB1515035 A GB 1515035A GB 1515035 A GB1515035 A GB 1515035A GB 459130 A GB459130 A GB 459130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- article
- litre
- silver
- metal
- 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
- 229910052751 metal Inorganic materials 0.000 title abstract 6
- 239000002184 metal Substances 0.000 title abstract 6
- 238000000576 coating method Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 3
- 239000010410 layer Substances 0.000 abstract 3
- 229910052709 silver Inorganic materials 0.000 abstract 3
- 239000004332 silver Substances 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 2
- 239000001164 aluminium sulphate Substances 0.000 abstract 2
- 235000011128 aluminium sulphate Nutrition 0.000 abstract 2
- 239000010953 base metal Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 2
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- 239000011780 sodium chloride Substances 0.000 abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 239000011247 coating layer Substances 0.000 abstract 1
- 150000007524 organic acids Chemical class 0.000 abstract 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 1
- 229910052703 rhodium Inorganic materials 0.000 abstract 1
- 239000010948 rhodium Substances 0.000 abstract 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- ing And Chemical Polishing (AREA)
Abstract
In a method of stripping a composite coating formed of a plurality of layers of different metals from a metal article where the outer layer consists of or comprises one or more metals of the platinum group and the undercoating is of base metal, the coated article is treated with a solvent that will dissolve the base metal but will not attack the metal of the article or of the outer coating layer. In stripping a composite coating of a plurality of layers of nickel and rhodium from a silver or silver-plated article, the article is immersed in an acid bath, e.g. one comprising a mixture of phosphoric and/or hydrochloric acid and water, the major portion being the acid, which dissolves the nickel but does not attack the silver. The phosphoric &c. acid may be replaced by an organic acid which does not attack silver such as acetic acid, and the bath may also contain a small quantity of a metal sulphate such as aluminium sulphate and also sodium chloride. In one example, the bath comprises a mixture of two-thirds of a litre of phosphoric acid and one-third of a litre of water containing 56 grams each of aluminium sulphate and sodium chloride. If desired, one-third of a litre of phosphoric acid may be substituted by one-third of a litre of hydrochloric acid, and the amounts of the sulphate and chloride are 28-56 grams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1515035A GB459130A (en) | 1935-05-24 | 1935-05-24 | Improvements in methods for stripping coatings from coated metal articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1515035A GB459130A (en) | 1935-05-24 | 1935-05-24 | Improvements in methods for stripping coatings from coated metal articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB459130A true GB459130A (en) | 1936-12-24 |
Family
ID=10053919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1515035A Expired GB459130A (en) | 1935-05-24 | 1935-05-24 | Improvements in methods for stripping coatings from coated metal articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB459130A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3104167A (en) * | 1960-02-11 | 1963-09-17 | Philco Corp | Method and solution for selectively stripping electroless nickel from a substrate |
-
1935
- 1935-05-24 GB GB1515035A patent/GB459130A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3104167A (en) * | 1960-02-11 | 1963-09-17 | Philco Corp | Method and solution for selectively stripping electroless nickel from a substrate |
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