GB892385A - Improved process for the production of corrosion-risistant coatings on zinc- and cadmium surfaces - Google Patents

Improved process for the production of corrosion-risistant coatings on zinc- and cadmium surfaces

Info

Publication number
GB892385A
GB892385A GB34674/59A GB3467459A GB892385A GB 892385 A GB892385 A GB 892385A GB 34674/59 A GB34674/59 A GB 34674/59A GB 3467459 A GB3467459 A GB 3467459A GB 892385 A GB892385 A GB 892385A
Authority
GB
United Kingdom
Prior art keywords
corrosion
zinc
production
coatings
risistant
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
GB34674/59A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB892385A publication Critical patent/GB892385A/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
    • C23C22/24—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 hexavalent chromium compounds

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 process for the production of wipe-, scratch-, moisture-, and corrosion-resistant coatings on zinc-end cadmium-clad surfaces consists in immersing the surfaces in a chromic acid solution containing at least 30% of chlorine ions based on the weight of chromic acid, together with buffering substances and substances which stabilize the redox potential of the solution. The chlorine ions are preferably formed from alkali chlorides. Examples of stabilizers are potassium chlorate and potassium nitrate; the buffer substances are preferably chlorides of weak bases.
GB34674/59A 1959-05-14 1959-10-13 Improved process for the production of corrosion-risistant coatings on zinc- and cadmium surfaces Expired GB892385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE892385X 1959-05-14

Publications (1)

Publication Number Publication Date
GB892385A true GB892385A (en) 1962-03-28

Family

ID=6846284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34674/59A Expired GB892385A (en) 1959-05-14 1959-10-13 Improved process for the production of corrosion-risistant coatings on zinc- and cadmium surfaces

Country Status (1)

Country Link
GB (1) GB892385A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650302A1 (en) * 1989-07-31 1991-02-01 Omi Int Corp PROCESSES FOR PREPARING CORROSION RESISTANT ZINC-COBALT SURFACES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650302A1 (en) * 1989-07-31 1991-02-01 Omi Int Corp PROCESSES FOR PREPARING CORROSION RESISTANT ZINC-COBALT SURFACES

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