GB398180A - Improvements in and relating to treatment of metals and alloys to protect them from corrosion - Google Patents

Improvements in and relating to treatment of metals and alloys to protect them from corrosion

Info

Publication number
GB398180A
GB398180A GB631632A GB631632A GB398180A GB 398180 A GB398180 A GB 398180A GB 631632 A GB631632 A GB 631632A GB 631632 A GB631632 A GB 631632A GB 398180 A GB398180 A GB 398180A
Authority
GB
United Kingdom
Prior art keywords
alloys
corrosion
treatment
metals
treated
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
GB631632A
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.)
HORACE CAMPBELL HALL
Original Assignee
HORACE CAMPBELL HALL
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 HORACE CAMPBELL HALL filed Critical HORACE CAMPBELL HALL
Priority to GB631632A priority Critical patent/GB398180A/en
Publication of GB398180A publication Critical patent/GB398180A/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
    • C23C22/33—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 containing also phosphates
    • 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

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

Metals and alloys, e.g. iron, steel, aluminium, or aluminium alloys, are treated to protect them from corrosion by immersion in a hot or boiling aqueous solution of phosphoric acid and one or more of the chromium compounds chromic acid, chromic anhydride, chromates, and dichromates. The treatment is stated to remove occluded hydrogen from the surface of the metal. The treatment may be applied to non-ferrous metals and alloys, e.g. aluminium alloys, which have been treated by the process described in Specification 396,746, the original phosphate coat being reinforced by the deposition of chromium phosphate. Steel tools, e.g. drills and cutters, may be treated by the process to remove the surface hydrogen to render the cutting edge less susceptible to corrosion-fatigue.
GB631632A 1932-03-02 1932-03-02 Improvements in and relating to treatment of metals and alloys to protect them from corrosion Expired GB398180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB631632A GB398180A (en) 1932-03-02 1932-03-02 Improvements in and relating to treatment of metals and alloys to protect them from corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB631632A GB398180A (en) 1932-03-02 1932-03-02 Improvements in and relating to treatment of metals and alloys to protect them from corrosion

Publications (1)

Publication Number Publication Date
GB398180A true GB398180A (en) 1933-09-04

Family

ID=9812276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB631632A Expired GB398180A (en) 1932-03-02 1932-03-02 Improvements in and relating to treatment of metals and alloys to protect them from corrosion

Country Status (1)

Country Link
GB (1) GB398180A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494910A (en) * 1948-07-12 1950-01-17 American Chem Paint Co Method of and composition for coating aluminum
US2832708A (en) * 1955-11-25 1958-04-29 Gen Motors Corp Method of treating stainless steel to improve its corrosion resistance
EP0207484A2 (en) * 1985-07-01 1987-01-07 Olin Corporation Copper stainproofing technique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494910A (en) * 1948-07-12 1950-01-17 American Chem Paint Co Method of and composition for coating aluminum
US2832708A (en) * 1955-11-25 1958-04-29 Gen Motors Corp Method of treating stainless steel to improve its corrosion resistance
EP0207484A2 (en) * 1985-07-01 1987-01-07 Olin Corporation Copper stainproofing technique
EP0207484A3 (en) * 1985-07-01 1988-01-13 Olin Corporation Copper stainproofing technique

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