GB395491A - A process for preventing the tarnishing of the surface of silver and its alloys - Google Patents

A process for preventing the tarnishing of the surface of silver and its alloys

Info

Publication number
GB395491A
GB395491A GB14541/32A GB1454132A GB395491A GB 395491 A GB395491 A GB 395491A GB 14541/32 A GB14541/32 A GB 14541/32A GB 1454132 A GB1454132 A GB 1454132A GB 395491 A GB395491 A GB 395491A
Authority
GB
United Kingdom
Prior art keywords
silver
alloys
tarnishing
preventing
solution
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
Application number
GB14541/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VER fur DIE PROBIER und FORSC
Original Assignee
VER fur DIE PROBIER und FORSC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VER fur DIE PROBIER und FORSC filed Critical VER fur DIE PROBIER und FORSC
Publication of GB395491A publication Critical patent/GB395491A/en
Expired legal-status Critical Current

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
    • 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
    • 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
    • C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates

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)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

An invisible protective coating is formed on the surface of silver or silver alloys by treating with a solution containing chromic acid. Cuprammonium chloride, a persulphate, or both of these substances may be added to the solution. The metal is preferably first degreased and then immersed in the solution, washed, and dried.
GB14541/32A 1931-05-23 1932-05-23 A process for preventing the tarnishing of the surface of silver and its alloys Expired GB395491A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE737433X 1931-05-23
DE1995225X 1931-05-23
DE395491X 1931-05-23
DEV26875D DE572342C (en) 1931-05-23 1931-05-24 Process for preventing tarnishing of surfaces made of silver or a silver alloy
DEV27314D DE601408C (en) 1931-05-23 1931-09-17 Process for preventing tarnishing of objects made of nickel, copper and alloys of these metals

Publications (1)

Publication Number Publication Date
GB395491A true GB395491A (en) 1933-07-20

Family

ID=61187870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14541/32A Expired GB395491A (en) 1931-05-23 1932-05-23 A process for preventing the tarnishing of the surface of silver and its alloys

Country Status (4)

Country Link
US (1) US1995225A (en)
DE (2) DE572342C (en)
FR (1) FR737433A (en)
GB (1) GB395491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4135801A1 (en) * 1990-11-03 1992-05-07 Glaverbel REFLECTIVE PRODUCTS AND METHOD FOR THE PRODUCTION THEREOF

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548419A (en) * 1945-08-23 1951-04-10 Poor & Co Method for production of lustrous zinc
NL102025C (en) * 1955-05-14
US5219617A (en) * 1989-09-19 1993-06-15 Michigan Chrome And Chemical Company Corrosion resistant coated articles and process for making same
US20150184307A1 (en) * 2012-07-31 2015-07-02 Daiwa Fine Chemicals Co., Ltd. (Laboratory) Silver electroplating solution

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4135801A1 (en) * 1990-11-03 1992-05-07 Glaverbel REFLECTIVE PRODUCTS AND METHOD FOR THE PRODUCTION THEREOF
GB2254339A (en) * 1990-11-03 1992-10-07 Glaverbel Treating silver reflective coatings with a solution containing ions selected from cr, v, ti, fe, in, cu and al
US5296297A (en) * 1990-11-03 1994-03-22 Glaverbel Reflective articles having improved corrosion resistance
GB2254339B (en) * 1990-11-03 1994-09-07 Glaverbel Reflective articles and methods of manufacturing same
US5374451A (en) * 1990-11-03 1994-12-20 Glaverbel Reflective articles and methods of manufacturing same
DE4135801C2 (en) * 1990-11-03 2000-07-06 Glaverbel Process for producing a glass substrate with at least one reflective metal coating with improved resistance to corrosion and its use

Also Published As

Publication number Publication date
FR737433A (en) 1932-12-12
DE601408C (en) 1934-08-15
US1995225A (en) 1935-03-19
DE572342C (en) 1933-03-14

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