GB771925A - Electro-deposition of chromium plate - Google Patents

Electro-deposition of chromium plate

Info

Publication number
GB771925A
GB771925A GB12351/54A GB1235154A GB771925A GB 771925 A GB771925 A GB 771925A GB 12351/54 A GB12351/54 A GB 12351/54A GB 1235154 A GB1235154 A GB 1235154A GB 771925 A GB771925 A GB 771925A
Authority
GB
United Kingdom
Prior art keywords
silicofluoride
concentration
bath
sulphate
strontium
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
GB12351/54A
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.)
Primerica Inc
Original Assignee
Metal and Thermit Corp
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 Metal and Thermit Corp filed Critical Metal and Thermit Corp
Publication of GB771925A publication Critical patent/GB771925A/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
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

771,925. Electrodeposition of chromium. METAL & THERMIT CORPORATION. April 28, 1954 [May 20, 1953], No. 12351/54. Class 41. A crack-free layer of chromium is deposited on a metal article at a current density of 0.5 to 8 amps/sq. in. from an aqueous bath at a temperature of 140‹ F. to the bath boiling point comprising per litre 200 to 900 gms. CrO 3 , strontium sulphate and sodium or potassium silicofluoride in excess of their bath solubility, a soluble non-catalytic strontium compound and a non-catalytic compound of the same metal as the silicofluoride to suppress the concentration of the dissolved. alkali metal silicofluoride so that the sum of dissolved sulphate and silicofluoride varies with .Cr0 3 concentration as shown in the area A, B, C, D of the graph. Preferably the sulphate concentration is between 0.3 and 5.5 gms/litre and the silicofluoride concentration is between. 1.0 and 11.4 gms./litre, and the preferred operating range is within the area J, K, L, M at a bath temperature of 145‹ to 155‹ F. When the bath is used at conditions specified by values above the line G, H, the concentration of silicofluoride should exceed that of sulphate, while for values below the line E, F, the reverse condition applies. Suitable non-catalytic compounds are the carbonates, chromates, and hydroxides of strontium, sodium, and potassium, strontium oxide, and sodium and potassium bichromates. Specifications 697,786 and 711,468 are referred to.
GB12351/54A 1953-05-20 1954-04-28 Electro-deposition of chromium plate Expired GB771925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US356188A US2686756A (en) 1953-05-20 1953-05-20 Chromium plating

Publications (1)

Publication Number Publication Date
GB771925A true GB771925A (en) 1957-04-10

Family

ID=23400495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12351/54A Expired GB771925A (en) 1953-05-20 1954-04-28 Electro-deposition of chromium plate

Country Status (4)

Country Link
US (1) US2686756A (en)
DE (1) DE1040338B (en)
FR (1) FR1110280A (en)
GB (1) GB771925A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907656A (en) * 1953-11-12 1959-10-06 Chrome Steel Plate Corp Lithographic plates
US2787589A (en) * 1954-08-12 1957-04-02 Metal & Thermit Corp Chromium plating
US2787588A (en) * 1954-08-12 1957-04-02 Metal & Thermit Corp Chromium plating
US2800437A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Chromium plating
US2800438A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Chromium plating
US2800443A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Method of chromium plating
US2800436A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Method of chromium plating
DE1078840B (en) * 1956-12-24 1960-03-31 Deinert & Co Spezialbetr E Fue Use of galvanically deposited chrome coatings
US2916424A (en) * 1957-11-07 1959-12-08 Metal & Thermit Corp Process for chromium plating
US2950234A (en) * 1958-02-26 1960-08-23 Metal & Thermit Corp Chromium plating process and bath
NL269312A (en) * 1960-02-18
DE1496967A1 (en) * 1963-08-26
US6197183B1 (en) * 2000-02-18 2001-03-06 Richard C. Iosso Electrodeposition bath for wear-resistant zinc articles
EP1133220B1 (en) * 2000-03-10 2011-05-11 GBC Metals, LLC Copper foil with low profile bond enhancement
US8822007B2 (en) * 2010-01-23 2014-09-02 Johnson Controls Technology Company Decorative element, dashboard, and method for manufacturing a decorative element

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640022A (en) * 1950-11-07 1953-05-26 United Chromium Inc Composition, bath, and process for chromium plating

Also Published As

Publication number Publication date
US2686756A (en) 1954-08-17
FR1110280A (en) 1956-02-10
DE1040338B (en) 1958-10-02

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