GB374003A - Improvements in tarnish resisting silver and process of producing it - Google Patents

Improvements in tarnish resisting silver and process of producing it

Info

Publication number
GB374003A
GB374003A GB5401/31A GB540131A GB374003A GB 374003 A GB374003 A GB 374003A GB 5401/31 A GB5401/31 A GB 5401/31A GB 540131 A GB540131 A GB 540131A GB 374003 A GB374003 A GB 374003A
Authority
GB
United Kingdom
Prior art keywords
rhodium
silver
nickel
sulphuric acid
coating
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
GB5401/31A
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.)
PRECIOUS METALS DEVELOPING CO
Original Assignee
PRECIOUS METALS DEVELOPING CO
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 PRECIOUS METALS DEVELOPING CO filed Critical PRECIOUS METALS DEVELOPING CO
Publication of GB374003A publication Critical patent/GB374003A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/50—Electroplating: Baths therefor from solutions of platinum group metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
    • C25D5/611—Smooth layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S205/00—Electrolysis: processes, compositions used therein, and methods of preparing the compositions
    • Y10S205/917—Treatment of workpiece between coating steps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/934—Electrical process
    • Y10S428/935—Electroplating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12896—Ag-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12944—Ni-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12986—Adjacent functionally defined components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Laminated Bodies (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

374,003. Electrodeposition of rhodium and other metals. PRECIOUS METALS DEVELOPING CO., Inc., 54, Austin Street, Newark, New Jersey, U.S.A. Feb. 20, 1931, No. 5401. Convention date, Jan. 21. Addition to 374,002. [Class 41.] An article having a surface of a tarnishable metal is provided with a coating of a substantially white tarnish-resisting metal or metals and with an outer coating of rhodium. The article may be of silver or silver-plate. In an example, the article is first dipped in sulphuric acid or treated as cathode in 5-10 per cent sulphuric acid solution with a nickel or lead anode, using a cathode current density of 10-50 amps. per sq. ft. It is then coated with a thin flash of nickel, treated with acid to remove adherent electrolyte, and coated with a thin flash of palladium. Alloying of the palladium with the silver is prevented by the under layer of nickel. A coating of rhodium is then deposited from a solution of rhodium sulphate in dilute sulphuric acid containing 2 gms. of rhodium and 20-40 c.c. of sulphuric acid per litre. A cathode current density of 2-5 amps. per sq. dcm., a temperature of 80- 100‹ F., and an anode of inert material such as platinum are employed. Cobalt or other white metal or alloy may be substituted for nickel, and platinum or white gold for palladium. The rhodium coating has substantially the same colour and finish as the original silver surface.
GB5401/31A 1930-05-31 1931-02-20 Improvements in tarnish resisting silver and process of producing it Expired GB374003A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US374002XA 1930-05-31 1930-05-31
US510271A US1947180A (en) 1930-05-31 1931-01-21 Tarnish resisting silver

Publications (1)

Publication Number Publication Date
GB374003A true GB374003A (en) 1932-05-20

Family

ID=26714095

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5401/31A Expired GB374003A (en) 1930-05-31 1931-02-20 Improvements in tarnish resisting silver and process of producing it
GB5400/31A Expired GB374002A (en) 1930-05-31 1931-02-20 Improvements in tarnish-resisting metals particularly those comprising silver and processes of producing the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB5400/31A Expired GB374002A (en) 1930-05-31 1931-02-20 Improvements in tarnish-resisting metals particularly those comprising silver and processes of producing the same

Country Status (3)

Country Link
US (1) US1947180A (en)
FR (1) FR712431A (en)
GB (2) GB374003A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744972C (en) * 1932-06-05 1944-02-22 Paul Ziegs Molding for dentures
DE921098C (en) * 1934-02-27 1955-01-24 Baker & Company Process for the production of dental posts
DE941011C (en) * 1932-05-13 1956-03-29 Baker & Company Dental post or dental post wire

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464256A (en) * 1944-02-05 1949-03-15 Donald M Packer Front-surface reflector and method of making same
US2472296A (en) * 1946-10-12 1949-06-07 Merton R Hartnell Soldering iron tip
US2461933A (en) * 1947-12-24 1949-02-15 Paul T Smith Rhodium alloy coatings and method of making same
US2885826A (en) * 1954-12-21 1959-05-12 British Thomson Houston Co Ltd Glass-to-metal seals
GB829730A (en) * 1957-10-25 1960-03-09 Engelhard Ind Inc Improvements in or relating to the surface treatment of articles made from platinum-rhodium alloys
US2929766A (en) * 1958-06-13 1960-03-22 Melpar Inc Plating of iridium
US3202489A (en) * 1959-12-01 1965-08-24 Hughes Aircraft Co Gold-aluminum alloy bond electrode attachment
US3748712A (en) * 1971-03-30 1973-07-31 Franklin Mint Corp Tarnish resistant plating for silver articles
US4673472A (en) * 1986-02-28 1987-06-16 Technic Inc. Method and electroplating solution for deposition of palladium or alloys thereof
US5614327A (en) * 1994-09-09 1997-03-25 Sarthoise De Revetements Electrolytiques Process for protecting a silver or silver-coated part
US6896739B1 (en) 2003-12-03 2005-05-24 For Your Ease Only, Inc. Anti-tarnish aqueous treatment
US7575665B2 (en) * 2005-04-28 2009-08-18 Delphi Technologies, Inc. Method of reducing corrosion of silver containing surfaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941011C (en) * 1932-05-13 1956-03-29 Baker & Company Dental post or dental post wire
DE744972C (en) * 1932-06-05 1944-02-22 Paul Ziegs Molding for dentures
DE921098C (en) * 1934-02-27 1955-01-24 Baker & Company Process for the production of dental posts

Also Published As

Publication number Publication date
FR712431A (en) 1931-10-02
GB374002A (en) 1932-05-20
US1947180A (en) 1934-02-13

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