GB889183A - Improvements relating to the formation of coatings on metal surfaces - Google Patents

Improvements relating to the formation of coatings on metal surfaces

Info

Publication number
GB889183A
GB889183A GB1703260A GB1703260A GB889183A GB 889183 A GB889183 A GB 889183A GB 1703260 A GB1703260 A GB 1703260A GB 1703260 A GB1703260 A GB 1703260A GB 889183 A GB889183 A GB 889183A
Authority
GB
United Kingdom
Prior art keywords
chromium compound
calculated
cro3
polymethacrylamide
weight
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
GB1703260A
Inventor
Ernest Percy Bell
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
Priority to GB1703260A priority Critical patent/GB889183A/en
Publication of GB889183A publication Critical patent/GB889183A/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
    • C23C22/05—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
    • C23C22/26—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 organic compounds
    • C23C22/28—Macromolecular compounds

Abstract

The method of the parent Specification is modified by replacing the polyacrylic acid by an equal amount of polymethacrylamide. If desired, the hexavalent chromium compound may be partly replaced by phosphoric acid so that the proportions, calculated respectively as CrO3 and PO4, are from 7:1 to 1:3 by weight. The ratio of hexavalent chromium compound (calculated as CrO3), plus phosphoric acid (calculated as PO4) if present, to the polymethacrylamide should be from 8:1 to 1:1 by weight. The preferred chromium compound is chromic acid.ALSO:The method of the parent Specification is modified by replacing the polyacrylic acid by an equal amount of polymethacrylamide. If desired, the hexavalent chromium compound may be partly replaced by phosphoric acid so that the proportions, calculated respectively as CrO3 and PO4, are from 7:1 to 1:3 by weight. The ratio of hexavalent chromium compound (calculated as CrO3), plus phosphoric acid (calculated as PO4) if present, to the polymethacrylamide should be from 8:1 to 1:1 by weight. The preferred chromium compound is chromic acid.
GB1703260A 1960-05-13 1960-05-13 Improvements relating to the formation of coatings on metal surfaces Expired GB889183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1703260A GB889183A (en) 1960-05-13 1960-05-13 Improvements relating to the formation of coatings on metal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1703260A GB889183A (en) 1960-05-13 1960-05-13 Improvements relating to the formation of coatings on metal surfaces

Publications (1)

Publication Number Publication Date
GB889183A true GB889183A (en) 1962-02-07

Family

ID=10088006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1703260A Expired GB889183A (en) 1960-05-13 1960-05-13 Improvements relating to the formation of coatings on metal surfaces

Country Status (1)

Country Link
GB (1) GB889183A (en)

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