GB648888A - Improvements in the production of phosphate coatings on metal surfaces - Google Patents

Improvements in the production of phosphate coatings on metal surfaces

Info

Publication number
GB648888A
GB648888A GB1116447A GB1116447A GB648888A GB 648888 A GB648888 A GB 648888A GB 1116447 A GB1116447 A GB 1116447A GB 1116447 A GB1116447 A GB 1116447A GB 648888 A GB648888 A GB 648888A
Authority
GB
United Kingdom
Prior art keywords
metal
cations
added
metals
aqueous solution
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
GB1116447A
Inventor
Royston Fraser Drysdale
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.)
Walterisation Co Ltd
Original Assignee
Walterisation 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 Walterisation Co Ltd filed Critical Walterisation Co Ltd
Priority to GB1116447A priority Critical patent/GB648888A/en
Publication of GB648888A publication Critical patent/GB648888A/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
    • C23C22/07—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 phosphates
    • C23C22/08—Orthophosphates

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

Corrosion resistant coatings on metals or alloys are produced by treating with an aqueous solution of a metal phosphate to which has been added the cations of at least two metals, excluding the alkali metals, one more basic and the other less basic than the metal being treated, the total amount of added cations lying between 0.003 and 0.04 grms. per litre of the aqueous solution. It is preferred that the total amount of such added cations does not exceed 0.02 and preferably 0.01 grams per litre. The metal to be treated may be a ferrous metal when the more basic metal may be one or more of the metals zinc, magnesium, aluminium, barium, strontium, manganese, calcium and chromium and the less basic metal one or more of nickel, cobalt, lead and copper. The bath may comprise an aqueous solution of ferrous phosphate and iron in phosphoric acid. The metal cations may be added to a concentrate which is then diluted twenty-five times to give the phosphating bath.
GB1116447A 1947-04-25 1947-04-25 Improvements in the production of phosphate coatings on metal surfaces Expired GB648888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1116447A GB648888A (en) 1947-04-25 1947-04-25 Improvements in the production of phosphate coatings on metal surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1116447A GB648888A (en) 1947-04-25 1947-04-25 Improvements in the production of phosphate coatings on metal surfaces

Publications (1)

Publication Number Publication Date
GB648888A true GB648888A (en) 1951-01-17

Family

ID=9981195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1116447A Expired GB648888A (en) 1947-04-25 1947-04-25 Improvements in the production of phosphate coatings on metal surfaces

Country Status (1)

Country Link
GB (1) GB648888A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975082A (en) * 1957-01-22 1961-03-14 John A Henricks Method of providing ferrous articles with phosphate coatings and compositions therefor
GB2208876A (en) * 1987-08-19 1989-04-19 Ardrox Pyrene Ltd Process for forming phosphate coatings on metals
GB2223239A (en) * 1988-08-24 1990-04-04 Ardrox Pyrene Ltd Phosphating process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975082A (en) * 1957-01-22 1961-03-14 John A Henricks Method of providing ferrous articles with phosphate coatings and compositions therefor
GB2208876A (en) * 1987-08-19 1989-04-19 Ardrox Pyrene Ltd Process for forming phosphate coatings on metals
GB2208876B (en) * 1987-08-19 1991-08-14 Ardrox Pyrene Ltd Processes for forming phosphate coatings on metals
GB2223239A (en) * 1988-08-24 1990-04-04 Ardrox Pyrene Ltd Phosphating process
GB2223239B (en) * 1988-08-24 1992-09-23 Ardrox Pyrene Ltd Phosphating process

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