GB588127A - Improvements relating to the protection of ferrous metal against corrosion - Google Patents

Improvements relating to the protection of ferrous metal against corrosion

Info

Publication number
GB588127A
GB588127A GB245045A GB245045A GB588127A GB 588127 A GB588127 A GB 588127A GB 245045 A GB245045 A GB 245045A GB 245045 A GB245045 A GB 245045A GB 588127 A GB588127 A GB 588127A
Authority
GB
United Kingdom
Prior art keywords
coating
metal
ferrous metal
protection
against corrosion
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
GB245045A
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.)
COLGAN Inc
Original Assignee
COLGAN Inc
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 COLGAN Inc filed Critical COLGAN Inc
Priority to GB245045A priority Critical patent/GB588127A/en
Publication of GB588127A publication Critical patent/GB588127A/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

In a process of making ferrous metal surfaces resistant to corrosion the surface is treated with an aqueous solution of a molecularly dehydrated phosphate radical and a metal of the group consisting of calcium, strontium, barium, zinc and cadmium. A metal strip may be heated for one minute with a solution containing a soluble calcium salt and sodium metaphosphate whereby a coating of calcium metaphosphate is deposited on the strip, the pH value of the solution being maintained at 5 and the temperature at 65 DEG C. The ratio of the molecularly dehydrated phosphate radical to the metal radical should be held between .05:1 and 8:1. Metaphosphates or pyrophosphates may be used but it is stated that orthophosphates do not produce the coating. The coating does not remain for any length of time but it will protect the surface between the completion of one operation e.g. rolling, and the start of a subsequent operation e.g. lithographing or enamelling.
GB245045A 1945-01-31 1945-01-31 Improvements relating to the protection of ferrous metal against corrosion Expired GB588127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB245045A GB588127A (en) 1945-01-31 1945-01-31 Improvements relating to the protection of ferrous metal against corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB245045A GB588127A (en) 1945-01-31 1945-01-31 Improvements relating to the protection of ferrous metal against corrosion

Publications (1)

Publication Number Publication Date
GB588127A true GB588127A (en) 1947-05-14

Family

ID=9739790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB245045A Expired GB588127A (en) 1945-01-31 1945-01-31 Improvements relating to the protection of ferrous metal against corrosion

Country Status (1)

Country Link
GB (1) GB588127A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874057A (en) * 1949-11-11 1959-02-17 British Iron Steel Research Cementiferous paints

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874057A (en) * 1949-11-11 1959-02-17 British Iron Steel Research Cementiferous paints

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