GB872321A - Phosphate coatings - Google Patents

Phosphate coatings

Info

Publication number
GB872321A
GB872321A GB88659A GB88659A GB872321A GB 872321 A GB872321 A GB 872321A GB 88659 A GB88659 A GB 88659A GB 88659 A GB88659 A GB 88659A GB 872321 A GB872321 A GB 872321A
Authority
GB
United Kingdom
Prior art keywords
solution
phosphate
nitrate
manganese
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
GB88659A
Inventor
Royston Fraser Drysdale
Derek John Elgar
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 GB88659A priority Critical patent/GB872321A/en
Publication of GB872321A publication Critical patent/GB872321A/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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/081—Iron or steel solutions containing H2SO4
    • 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)
  • 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)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Before being provided with a phosphate coating, steel is pickled in an aqueous sulphuric acid solution which is maintained free of simple ferrous ions. The ferrous ions may be removed from the pickling solution by (a) oxidation to the ferric state, e.g. by adding to the solution sodium nitrate, sodium bromate, potassium permanganate, ammonium persulphate, potassium dichromate, hydrogen peroxide, potassium iodate or ceric ammonium sulphate, (b) complexing, e.g. with ethylene-diaminetetraacetic acid or its sodium salt, or (c) absorption on an ion exchange resin. The pickling solution may also contain an inhibitor. Phosphating is preferably effected using a zinc, manganese or iron phosphate solution; specified solutions contain zinc, phosphate, nitrate and nickel, and manganese, phosphate and nitrate. Heavy coatings suitable for deep-drawing, pressing and extrusion are obtained.
GB88659A 1959-01-09 1959-01-09 Phosphate coatings Expired GB872321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB88659A GB872321A (en) 1959-01-09 1959-01-09 Phosphate coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB88659A GB872321A (en) 1959-01-09 1959-01-09 Phosphate coatings

Publications (1)

Publication Number Publication Date
GB872321A true GB872321A (en) 1961-07-05

Family

ID=9712215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB88659A Expired GB872321A (en) 1959-01-09 1959-01-09 Phosphate coatings

Country Status (1)

Country Link
GB (1) GB872321A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210900A (en) * 1987-10-13 1989-06-21 Nihon Parkerizing Phosphate coatings on metals
EP0922787A1 (en) * 1997-12-10 1999-06-16 Imphy S.A. Process for pickling stainless steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210900A (en) * 1987-10-13 1989-06-21 Nihon Parkerizing Phosphate coatings on metals
GB2210900B (en) * 1987-10-13 1991-11-20 Nihon Parkerizing Compositions and processes for forming phosphate coatings on metals
EP0922787A1 (en) * 1997-12-10 1999-06-16 Imphy S.A. Process for pickling stainless steel

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