GB829792A - Improvements relating to the formation of phosphate coatings - Google Patents

Improvements relating to the formation of phosphate coatings

Info

Publication number
GB829792A
GB829792A GB34344/56A GB3434456A GB829792A GB 829792 A GB829792 A GB 829792A GB 34344/56 A GB34344/56 A GB 34344/56A GB 3434456 A GB3434456 A GB 3434456A GB 829792 A GB829792 A GB 829792A
Authority
GB
United Kingdom
Prior art keywords
phosphate
solution
condensed
phosphate coating
phosphates
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
GB34344/56A
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 GB829792A publication Critical patent/GB829792A/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

Abstract

A phosphate coating is formed on a metal surface by cleaning the surface with an alkali cleaning solution, treating it with a solution of one or more condensed-phosphates which has a pH of at least 7 and finally treating it with a phosphate coating solution, the difference in pH between the condensed-phosphate solution and the phosphate coating solution being not more than 6.5 The cleaning solution may be based on soda lye, soda, metasilicates, water glass, trisodium phosphate and orthosilicates; two aqueous solutions given by way of example contain a non-ionic emulsifying agent, sodium carbonate and sodium hydroxide together with (a) trisodium phosphate, and (b) sodium disilicate. The condensed phosphate may be a pyrophosphate, e.g. tetrasodium pyrophosphate, or a tripolyphosphate, and the solution thereof may also contain titanium, tin or zirconium, preferably as phosphates; disodium phosphate; a wetting agent or emulsifying agent, e.g. an epoxy alcohol, amine, amide or alkyl phenol; and a flotation agent such as pine oil. The exemplified phosphate coating solution contains zinc phosphate and nitrate. Metals which may be coated include iron, steel, aluminium, zinc and cadmium.
GB34344/56A 1955-11-09 1956-11-09 Improvements relating to the formation of phosphate coatings Expired GB829792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE829792X 1955-11-09

Publications (1)

Publication Number Publication Date
GB829792A true GB829792A (en) 1960-03-09

Family

ID=6748598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34344/56A Expired GB829792A (en) 1955-11-09 1956-11-09 Improvements relating to the formation of phosphate coatings

Country Status (1)

Country Link
GB (1) GB829792A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1521837B1 (en) * 1962-08-01 1970-01-15 Metallgesellschaft Ag Process for cleaning and phosphating surfaces made of iron or zinc
GB2136454A (en) * 1983-03-02 1984-09-19 Pyrene Chemical Services Ltd Treatment of metal prior to coating with zinc phosphate
GB2152955A (en) * 1984-01-20 1985-08-14 Nihon Parkerizing Phosphate treatment of zinc-aluminium plated materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1521837B1 (en) * 1962-08-01 1970-01-15 Metallgesellschaft Ag Process for cleaning and phosphating surfaces made of iron or zinc
GB2136454A (en) * 1983-03-02 1984-09-19 Pyrene Chemical Services Ltd Treatment of metal prior to coating with zinc phosphate
GB2152955A (en) * 1984-01-20 1985-08-14 Nihon Parkerizing Phosphate treatment of zinc-aluminium plated materials

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