GB1443322A - Process for obtaining a silver or silvered piece with resistance to discolouration and corrosion and the pieces obtained by carrying out said process - Google Patents
Process for obtaining a silver or silvered piece with resistance to discolouration and corrosion and the pieces obtained by carrying out said processInfo
- Publication number
- GB1443322A GB1443322A GB4713873A GB4713873A GB1443322A GB 1443322 A GB1443322 A GB 1443322A GB 4713873 A GB4713873 A GB 4713873A GB 4713873 A GB4713873 A GB 4713873A GB 1443322 A GB1443322 A GB 1443322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- article
- corrosion
- resistance
- coating
- layer
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemically Coating (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
1443322 Preventing tarnishing of Ag OXY METAL INDUSTRIES CORP 9 Oct 1973 [9 Oct 1972] 47138/73 Heading C7B Resistance to corrosion, tarnishing and blackening of an article of Ag, Ag alloy or Ag plate is increased by coating it with at least one metallic layer comprising a noble metal selected from Au and the Pt group metals, and causing the said layer to diffuse into the article, such that the appearance of the article after said diffusion is substantially the same as before the coating step. Preferred metals are Au, Pt, Ru and Pd; the noble metal may be used in combination with one or more of Sb, As, Be, Bi, Cd, Cr, Co, Cu, In, Fe, Pb, Mn, Mo, Ni, Ta, Sn, Ti, W and Zn; coating to thickness 0À01-10Á may be by electro-phoresis, spraying of a liquid containing metal particles, vacuum deposition, electroless, or preferably, electrolytic plating; diffusion is performed at 100-500‹C in air or an inert atmosphere such as N 2 or Ar, e.g. a Pd layer 0À2-0À4Á thick is heated at 200-300‹C for 5-15 min. Solid Ag may be coated at pH 9À7 and 55‹C at C.D. 0À5 A/dm<SP>2</SP> in a white gold bath containing 4 g/l Au as sulphite, 12 g/l Cd as EDTA salt, 10 mg/l Cu as EDTA salt, 100 g/l NH 4 EDTA and 50 g/l Na 2 SO 3 , or at pH 9À5 at 50‹C and 0À2-0À5 A/dm<SP>2</SP> in a Pd bath containing 10 g/l Pd (as PdCl 2 ) 50 ml/1 NH 4 OH and 100 g/l (NH 4 ) 2 SO 3 .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1475172A CH569091A5 (en) | 1972-10-09 | 1972-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1443322A true GB1443322A (en) | 1976-07-21 |
Family
ID=4403545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4713873A Expired GB1443322A (en) | 1972-10-09 | 1973-10-09 | Process for obtaining a silver or silvered piece with resistance to discolouration and corrosion and the pieces obtained by carrying out said process |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS4994529A (en) |
| BR (1) | BR7307854D0 (en) |
| CH (1) | CH569091A5 (en) |
| DE (1) | DE2350394C3 (en) |
| ES (1) | ES419490A1 (en) |
| FR (1) | FR2208993B1 (en) |
| GB (1) | GB1443322A (en) |
| IT (1) | IT996268B (en) |
| NL (1) | NL7313884A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2196563A1 (en) * | 2008-12-12 | 2010-06-16 | Enthone, Incorporated | Process for inhibiting tarnishing of silver coatings |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5149133A (en) * | 1974-10-28 | 1976-04-28 | Alps Electric Co Ltd | Dogokino kitai tosuru ginmetsukidenkibuhino seizosuru hoho |
| JPS55158265A (en) * | 1979-05-28 | 1980-12-09 | Toshiba Corp | Decorative material and its manufacture |
| DE3416122A1 (en) * | 1984-04-30 | 1985-10-31 | Inovan-Stroebe GmbH & Co KG, 7534 Birkenfeld | METHOD FOR PRODUCING A CONTACT MATERIAL |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR890260A (en) * | 1942-03-30 | 1944-02-03 | Degussa | Process for manufacturing metallic objects, such as ornaments, table utensils and others |
-
1972
- 1972-10-09 CH CH1475172A patent/CH569091A5/xx not_active IP Right Cessation
-
1973
- 1973-10-05 IT IT5294273A patent/IT996268B/en active
- 1973-10-08 DE DE19732350394 patent/DE2350394C3/en not_active Expired
- 1973-10-09 ES ES419490A patent/ES419490A1/en not_active Expired
- 1973-10-09 BR BR785473A patent/BR7307854D0/en unknown
- 1973-10-09 FR FR7336056A patent/FR2208993B1/fr not_active Expired
- 1973-10-09 JP JP11373373A patent/JPS4994529A/ja active Pending
- 1973-10-09 GB GB4713873A patent/GB1443322A/en not_active Expired
- 1973-10-09 NL NL7313884A patent/NL7313884A/xx not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2196563A1 (en) * | 2008-12-12 | 2010-06-16 | Enthone, Incorporated | Process for inhibiting tarnishing of silver coatings |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2350394B2 (en) | 1977-06-30 |
| FR2208993A1 (en) | 1974-06-28 |
| DE2350394A1 (en) | 1974-05-02 |
| CH569091A5 (en) | 1975-11-14 |
| JPS4994529A (en) | 1974-09-07 |
| ES419490A1 (en) | 1976-04-01 |
| DE2350394C3 (en) | 1978-03-02 |
| FR2208993B1 (en) | 1976-10-01 |
| NL7313884A (en) | 1974-04-11 |
| BR7307854D0 (en) | 1974-06-27 |
| IT996268B (en) | 1975-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |