GB397179A - Improvements relating to the application of protective coatings to metals - Google Patents

Improvements relating to the application of protective coatings to metals

Info

Publication number
GB397179A
GB397179A GB5007/32A GB500732A GB397179A GB 397179 A GB397179 A GB 397179A GB 5007/32 A GB5007/32 A GB 5007/32A GB 500732 A GB500732 A GB 500732A GB 397179 A GB397179 A GB 397179A
Authority
GB
United Kingdom
Prior art keywords
solution
proportion
acid
free acid
metals
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
GB5007/32A
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 GB397179A publication Critical patent/GB397179A/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

A protective coating is formed on the surface of iron, zinc, magnesium, or their alloys by treating the surface with a hot acid phosphate solution containing a small amount of a metal less basic than the metal to be coated. The solution may be applied by spraying, in which case the proportion of total acid to free acid is between about 10 : 1 and 15 : 1, or it may be allowed to flow over the surface in which case the proportion is between about 10 : 1 and 12 : 1. The solution is prepared from materials of the kind described in Specification 346,401 and is then treated with an alkaline substance, e.g. carbonate of zinc, manganese, or sodium, until the desired proportion of total acid to free acid is obtained. Alternatively the freshly prepared solution may be used as a dipping bath in the manner described in Specification 346,401 until the amount of free acid has been sufficiently reduced.
GB5007/32A 1931-02-21 1932-02-19 Improvements relating to the application of protective coatings to metals Expired GB397179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US397179XA 1931-02-21 1931-02-21

Publications (1)

Publication Number Publication Date
GB397179A true GB397179A (en) 1933-08-21

Family

ID=21907007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5007/32A Expired GB397179A (en) 1931-02-21 1932-02-19 Improvements relating to the application of protective coatings to metals

Country Status (1)

Country Link
GB (1) GB397179A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971252C (en) * 1954-12-24 1958-12-31 Siemens Ag Insulation sleeve for cage windings embedded in grooves

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971252C (en) * 1954-12-24 1958-12-31 Siemens Ag Insulation sleeve for cage windings embedded in grooves

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