GB1185019A - Improvements relating to Protective Coatings and Anti-Corrosion Treatments - Google Patents

Improvements relating to Protective Coatings and Anti-Corrosion Treatments

Info

Publication number
GB1185019A
GB1185019A GB5474366A GB5474366A GB1185019A GB 1185019 A GB1185019 A GB 1185019A GB 5474366 A GB5474366 A GB 5474366A GB 5474366 A GB5474366 A GB 5474366A GB 1185019 A GB1185019 A GB 1185019A
Authority
GB
United Kingdom
Prior art keywords
salt
fluoride
acid
nitrate
preferred
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
GB5474366A
Inventor
Michael Dwin Roper
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.)
ELECTRO CHEM ENG
Original Assignee
ELECTRO CHEM ENG
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 ELECTRO CHEM ENG filed Critical ELECTRO CHEM ENG
Priority to GB5474366A priority Critical patent/GB1185019A/en
Publication of GB1185019A publication Critical patent/GB1185019A/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
    • C23C22/34—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 fluorides or complex fluorides
    • C23C22/37—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 fluorides or complex fluorides containing also hexavalent chromium compounds
    • 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

Abstract

1,185,019. Passivating metal surfaces. ELECTRO CHEMICAL ENG. CO. Ltd. Feb.21, 1968 [Dec. 7, 19661, No. 54743/66. Heading C7U. Zn, Cd or Sn surfaces are passivated by treating in a solution containing hexavalent Cr, nitrate ions, an inorganic acid sulphate ions and a salt of Ti and/or Zr. The surface may be a coating of Zn, Cd or Sn on iron or steel e.g. electro-deposited Zn. The solution may also contain boric acid, sodium nitrate fluoride, zinc ions as the chloride or nitrate. Nitric acid is the preferred acid and the Ti and Zr may be added as the fluozirconate, fluoride, sulphate, nitrate or oxalate, the tetravalent salt being preferred. The preferred concentrations in gms/ litre are:- Cr<SP>+6</SP> 0À175 to 5 as CrO 3 0À280 to 8À1 as Na 2 CrO 4 F- 0À475 to 13À7 as Na F SO 4 <SP>-</SP> 0À075 to 2À16 as (NH 4 ) 2 SO 4 Acid 3À55 to 42À6 as HNO 3 70% solution. Zn salt # 0À2 to 10 as Zn (NO 3 ) 2 6H 2 O # 0À044 to 2À2 as Zn<SP>2+</SP> Zr salt # 0À1 to 6À2 as K Zr fluoride # 0À032 to 2 as Zr<SP>4</SP> <SP>+</SP> Ti salt # 0À1 to 5 as KTi fluoride # 0À02 to 1 as Ti<SP>4+</SP>
GB5474366A 1966-12-07 1966-12-07 Improvements relating to Protective Coatings and Anti-Corrosion Treatments Expired GB1185019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5474366A GB1185019A (en) 1966-12-07 1966-12-07 Improvements relating to Protective Coatings and Anti-Corrosion Treatments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5474366A GB1185019A (en) 1966-12-07 1966-12-07 Improvements relating to Protective Coatings and Anti-Corrosion Treatments

Publications (1)

Publication Number Publication Date
GB1185019A true GB1185019A (en) 1970-03-18

Family

ID=10471941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5474366A Expired GB1185019A (en) 1966-12-07 1966-12-07 Improvements relating to Protective Coatings and Anti-Corrosion Treatments

Country Status (1)

Country Link
GB (1) GB1185019A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172614A (en) * 1985-03-20 1986-09-24 Omi Int Corp Passivation
GB2183680A (en) * 1985-11-04 1987-06-10 Parker Chemical Co No-rinse treatment for metal surfaces
GB2235215A (en) * 1989-07-31 1991-02-27 Omi Int Corp Preparation of corrosion-resistant surfaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172614A (en) * 1985-03-20 1986-09-24 Omi Int Corp Passivation
GB2183680A (en) * 1985-11-04 1987-06-10 Parker Chemical Co No-rinse treatment for metal surfaces
GB2235215A (en) * 1989-07-31 1991-02-27 Omi Int Corp Preparation of corrosion-resistant surfaces

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees