GB470624A - Improvements in and relating to methods of producing zinc coatings - Google Patents

Improvements in and relating to methods of producing zinc coatings

Info

Publication number
GB470624A
GB470624A GB6933/37A GB693337A GB470624A GB 470624 A GB470624 A GB 470624A GB 6933/37 A GB6933/37 A GB 6933/37A GB 693337 A GB693337 A GB 693337A GB 470624 A GB470624 A GB 470624A
Authority
GB
United Kingdom
Prior art keywords
relating
methods
producing zinc
zinc coatings
anhydrous sodium
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
GB6933/37A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB470624A publication Critical patent/GB470624A/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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals
    • C23F3/06—Heavy metals with acidic solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Electrodeposited coatings of zinc are rendered bright by dipping in a bath containing 10-60 oz. chromic acid, 0,05-5,0 oz. anhydrous sodium sulphate and 0,1-1,0 oz. nitric acid per gallon. A preferred bath contains 40 oz. chromic acid, 2 oz. anhydrous sodium sulphate and 0,7 oz. nitric acid per gallon.
GB6933/37A 1936-03-10 1937-03-09 Improvements in and relating to methods of producing zinc coatings Expired GB470624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US470624XA 1936-03-10 1936-03-10

Publications (1)

Publication Number Publication Date
GB470624A true GB470624A (en) 1937-08-18

Family

ID=21946867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6933/37A Expired GB470624A (en) 1936-03-10 1937-03-09 Improvements in and relating to methods of producing zinc coatings

Country Status (1)

Country Link
GB (1) GB470624A (en)

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