GB720217A - Improvements relating to the chemical treatment of stainless steel - Google Patents

Improvements relating to the chemical treatment of stainless steel

Info

Publication number
GB720217A
GB720217A GB13989/52A GB1398952A GB720217A GB 720217 A GB720217 A GB 720217A GB 13989/52 A GB13989/52 A GB 13989/52A GB 1398952 A GB1398952 A GB 1398952A GB 720217 A GB720217 A GB 720217A
Authority
GB
United Kingdom
Prior art keywords
treatment
stainless steel
treated
aqueous solution
chemical treatment
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
GB13989/52A
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.)
Pyrene Co Ltd
Original Assignee
Pyrene 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 Pyrene Co Ltd filed Critical Pyrene Co Ltd
Publication of GB720217A publication Critical patent/GB720217A/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
    • C23C22/78—Pretreatment of the material to be coated

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)
  • Chemical Treatment Of Metals (AREA)

Abstract

Stainless steel surfaces are treated with an aqueous solution of nitric and hydrofluoric acids, washed and then treated with an oxalate-forming solution. Treatment with an aqueous solution of sulphuric or nitric acid, with or without chloride ions, may precede, and treatment with an aqueous solution of nitric acid may immediately follow, the treatment with nitric and hydrofluoric acids and, if the surface is scaled, it may be pre-treated by immersion in molten alkali followed by quenching in water. The oxalate coating may be formed by means of the solution described in Specification 661,385. The treatment may precede plastic deformation.
GB13989/52A 1951-06-02 1952-06-03 Improvements relating to the chemical treatment of stainless steel Expired GB720217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US720217XA 1951-06-02 1951-06-02

Publications (1)

Publication Number Publication Date
GB720217A true GB720217A (en) 1954-12-15

Family

ID=22105073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13989/52A Expired GB720217A (en) 1951-06-02 1952-06-03 Improvements relating to the chemical treatment of stainless steel

Country Status (1)

Country Link
GB (1) GB720217A (en)

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