GB617083A - Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces - Google Patents

Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces

Info

Publication number
GB617083A
GB617083A GB4565/46A GB456546A GB617083A GB 617083 A GB617083 A GB 617083A GB 4565/46 A GB4565/46 A GB 4565/46A GB 456546 A GB456546 A GB 456546A GB 617083 A GB617083 A GB 617083A
Authority
GB
United Kingdom
Prior art keywords
zinc
acid
production
corrosion resistant
resistant coatings
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
GB4565/46A
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.)
RHEEM RES PRODUCTS Inc
Original Assignee
RHEEM RES PRODUCTS 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 RHEEM RES PRODUCTS Inc filed Critical RHEEM RES PRODUCTS Inc
Publication of GB617083A publication Critical patent/GB617083A/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
    • C23C22/26—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 containing also organic compounds
    • C23C22/27—Acids

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)
  • Battery Electrode And Active Subsutance (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Zinc and cadmium surfaces are given a corrosion-resistant coating by treatment with an aqueous acidic solution consisting of chromic acid or a salt thereof, formic acid or a formate, nitric acid or a salt thereof, until a visible coating is formed, the sulphuric acid or sulphate being present in amount sufficient to produce a bronze colour. A suitable solution contains sodium bichromate 30-70 gm./l.; formic acid 30-60 cc./l.; zinc nitrate 10-30 gm./1.; and sulphuric acid 4-10 cc./1.; the pH range being 1-3.4. Temperatures of 33-212 DEG F., and preferably 80-90 DEG F. may be used.
GB4565/46A 1945-03-21 1946-02-13 Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces Expired GB617083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US617083XA 1945-03-21 1945-03-21

Publications (1)

Publication Number Publication Date
GB617083A true GB617083A (en) 1949-02-01

Family

ID=22037581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4565/46A Expired GB617083A (en) 1945-03-21 1946-02-13 Improvements in the production of corrosion resistant coatings on zinc and cadmium surfaces

Country Status (1)

Country Link
GB (1) GB617083A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022072857A1 (en) * 2020-10-02 2022-04-07 Solugen, Inc. Compositions for corrosion inhibition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022072857A1 (en) * 2020-10-02 2022-04-07 Solugen, Inc. Compositions for corrosion inhibition

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