GB820657A - Improvements relating to the formation of phosphate coatings on metal surfaces - Google Patents

Improvements relating to the formation of phosphate coatings on metal surfaces

Info

Publication number
GB820657A
GB820657A GB4638/57A GB463857A GB820657A GB 820657 A GB820657 A GB 820657A GB 4638/57 A GB4638/57 A GB 4638/57A GB 463857 A GB463857 A GB 463857A GB 820657 A GB820657 A GB 820657A
Authority
GB
United Kingdom
Prior art keywords
nitrite
formation
phosphate
hexametaphosphate
tripolyphosphate
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
GB4638/57A
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 GB820657A publication Critical patent/GB820657A/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
    • C23C22/23—Condensed phosphates

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

A metal surface is phosphated by immersion in a coating phosphate solution containing a nitrite and an amount of a tripolyphosphate or hexametaphosphate or both less than 0.8g/l. The coating phosphate is preferably zinc phosphate and the nitrite, sodium nitrite. The solution, which may also contain nitrate and cations such as copper or nickel, is replenished by adding coating phosphate ingredients, a nitrite, and an amount of tripolyphosphate and/or hexametaphosphate between 0.3 and 0.6g/sq.m. of treated surface, the ratio of nitrite to tripolyphosphate and/or hexametaphosphate being between 2 : 1 and 1 : 6. Coatings may be formed on iron, steel, zinc and aluminium.
GB4638/57A 1956-02-10 1957-02-11 Improvements relating to the formation of phosphate coatings on metal surfaces Expired GB820657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE820657X 1956-02-10

Publications (1)

Publication Number Publication Date
GB820657A true GB820657A (en) 1959-09-23

Family

ID=6737833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4638/57A Expired GB820657A (en) 1956-02-10 1957-02-11 Improvements relating to the formation of phosphate coatings on metal surfaces

Country Status (1)

Country Link
GB (1) GB820657A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422730A1 (en) * 1978-04-13 1979-11-09 Lea Mfg Co PHOSPHATE COATING COMPOSITION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2422730A1 (en) * 1978-04-13 1979-11-09 Lea Mfg Co PHOSPHATE COATING COMPOSITION

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