GB563025A - Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith - Google Patents

Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith

Info

Publication number
GB563025A
GB563025A GB979/43A GB97943A GB563025A GB 563025 A GB563025 A GB 563025A GB 979/43 A GB979/43 A GB 979/43A GB 97943 A GB97943 A GB 97943A GB 563025 A GB563025 A GB 563025A
Authority
GB
United Kingdom
Prior art keywords
zinc
acid
grams
sulphuric
cadmium
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
GB979/43A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor 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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB563025A publication Critical patent/GB563025A/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

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)
  • Electrolytic Production Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

563,025. Electrolysis. FORD MOTOR CO., Ltd. Jan. 19; 1943, No. 979. Convention date, June 2, 1942. Drawings to Specification. [Class 41] [Also in Group II] To produce high lustre durability and a surface capable of being painted on the surface of zinc or cadmium or metal coated therewith, the zinc &c. is immersed, e.g. for a period not exceeding 60 seconds, in a chromic acid bath which includes minute amounts of sulphuric and nitric acids, the ratio of the chromic acid to the combined amounts of the other acids being at least 100 to 1 and the nitric acid being present in an amount in excess of the sulphuric acid. A transparent enamel such as an alkyde resin mixed with a melamine resin and dissolved in petrolein naphtha, may be applied after the zinc &c. has been dipped in the acid. In an example, a bath comprises 120 grams of chromic acid, 0.25-0.50 grams of sulphuric acid and 0.8-1.20 grams of nitric acid all per litre of solution. A zinc coating for treatment as set out above, is electro-deposited from a bath containing 8 ozs. per gallon of zinc cyanide, 4'of sodium cyanide and 7 of caustic soda with anodes formed by remelting scrap die castings.
GB979/43A 1942-06-02 1943-01-19 Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith Expired GB563025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US563025XA 1942-06-02 1942-06-02

Publications (1)

Publication Number Publication Date
GB563025A true GB563025A (en) 1944-07-26

Family

ID=22003505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB979/43A Expired GB563025A (en) 1942-06-02 1943-01-19 Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith

Country Status (1)

Country Link
GB (1) GB563025A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084103B (en) * 1953-03-13 1960-06-23 Armco Int Corp Process for the production of corrosion-resistant, unpainted and shiny metal zinc or aluminum surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084103B (en) * 1953-03-13 1960-06-23 Armco Int Corp Process for the production of corrosion-resistant, unpainted and shiny metal zinc or aluminum surfaces

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