GB812095A - Improvements relating to the formation of phosphate coatings - Google Patents

Improvements relating to the formation of phosphate coatings

Info

Publication number
GB812095A
GB812095A GB6627/57A GB662757A GB812095A GB 812095 A GB812095 A GB 812095A GB 6627/57 A GB6627/57 A GB 6627/57A GB 662757 A GB662757 A GB 662757A GB 812095 A GB812095 A GB 812095A
Authority
GB
United Kingdom
Prior art keywords
zinc
iron
hypophosphite
coating
manganese
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
GB6627/57A
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 GB812095A publication Critical patent/GB812095A/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

Abstract

An aqueous acidic coating-phosphate solution suitable for treating surfaces of iron, iron-base alloys, zinc and zinc-base alloys, comprises a phosphate of one or more of iron, zinc and manganese, and the hypophosphite radical, and has a pH of 1.8-3.2. The hypophosphite radical may be introduced into the solution as hypophosphorous acid or as the alkali metal, alkaline earth metal, or zinc, manganese or iron salts thereof. The solution may also contain accelerators such as nitrates, nitrites, sulphites, hydrogen peroxide, hydroxylamine, m-nitrobenzene sulphonate and picric acid. Fluoride may be added, particularly for coating zinc, in the form of hydrofluoric acid, sodium borofluoride or sodium bifluoride. Aqueous concentrates containing phosphoric acid, sodium hypophosphite and zinc, manganese or iron or a compound thereof may be used to replenish the coating bath; they may also be used to introduce hypophosphite into coating-phosphate solutions free of this radical. It is stated that the coatings formed act as a lubricant during drawing and are receptive to paint.
GB6627/57A 1956-02-27 1957-02-27 Improvements relating to the formation of phosphate coatings Expired GB812095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US812095XA 1956-02-27 1956-02-27

Publications (1)

Publication Number Publication Date
GB812095A true GB812095A (en) 1959-04-15

Family

ID=22162757

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6627/57A Expired GB812095A (en) 1956-02-27 1957-02-27 Improvements relating to the formation of phosphate coatings

Country Status (1)

Country Link
GB (1) GB812095A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179680A (en) * 1985-08-26 1987-03-11 Parker Chemical Co Method of forming phosphate coatings on zinc
EP1980608A1 (en) 2007-04-04 2008-10-15 Afton Chemical Corporation Phosphate coatings for improved wear properties
WO2012108849A1 (en) 2011-02-08 2012-08-16 Bortek Bor Teknolojilari Ve Mekatronik Sanayi Ve Ticaret Limited Sirketi Method for improving the features of phosphate coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179680A (en) * 1985-08-26 1987-03-11 Parker Chemical Co Method of forming phosphate coatings on zinc
EP1980608A1 (en) 2007-04-04 2008-10-15 Afton Chemical Corporation Phosphate coatings for improved wear properties
WO2012108849A1 (en) 2011-02-08 2012-08-16 Bortek Bor Teknolojilari Ve Mekatronik Sanayi Ve Ticaret Limited Sirketi Method for improving the features of phosphate coating

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