GB952255A - Solution and method for brightening cadmium - Google Patents

Solution and method for brightening cadmium

Info

Publication number
GB952255A
GB952255A GB6904/62A GB690462A GB952255A GB 952255 A GB952255 A GB 952255A GB 6904/62 A GB6904/62 A GB 6904/62A GB 690462 A GB690462 A GB 690462A GB 952255 A GB952255 A GB 952255A
Authority
GB
United Kingdom
Prior art keywords
cadmium
ions
solution
fluoride
sulphate
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
GB6904/62A
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.)
Conversion Chemical Corp
Original Assignee
Conversion Chemical Corp
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 Conversion Chemical Corp filed Critical Conversion Chemical Corp
Publication of GB952255A publication Critical patent/GB952255A/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
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/04—Heavy metals
    • C23F3/06—Heavy metals with acidic solutions
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium

Abstract

Cadmium surfaces are brightened by treatment in an aqueous acid solution with a pH of 1.0-3.5 and comprising 0.08-1 g/l trivalent chromium ions, 0.1-18 g/l of nitrate ions, and 0.4-5.2 g/l of ions selected from sulphate ions and the combination of fluoride and sulphate ions, the solution containing a maximum of 0.02 g/l of hexavalent chromium ions at a pH of 1-2 and less than 0.3 g/l of hexavalent chromium at a pH of 2-3.5. The solution may also contain 0.1-3 g/l of zinc and/or cadmium ions with a fluoride ion concentration of 0.2-0.4 g/l and a sulphate ion concentration of 0.75-1.5 g/l. The solution is maintained at 45-150 DEG F. during the process and the base treated may be any cadmium surface such as electrodeposited cadmium or a cadmium coated steel. The solution is prepared by adding to dilute nitric acid a dry powder mixture of sodium acid fluoride, chromium fluoride, and the sulphate of zinc and/or cadmium. Complex fluoride salts such as fluoborate and fluosilicate may also be added.
GB6904/62A 1961-03-21 1962-02-22 Solution and method for brightening cadmium Expired GB952255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US97164A US3072516A (en) 1961-03-21 1961-03-21 Solution and method for brightening cadmium

Publications (1)

Publication Number Publication Date
GB952255A true GB952255A (en) 1964-03-11

Family

ID=22261642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6904/62A Expired GB952255A (en) 1961-03-21 1962-02-22 Solution and method for brightening cadmium

Country Status (3)

Country Link
US (2) US3072516A (en)
DE (1) DE1207182B (en)
GB (1) GB952255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144773A (en) * 1983-07-19 1985-03-13 Omi Int Corp Non-peroxide trivalent chromium passivation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171766A (en) * 1962-10-04 1965-03-02 Conversion Chem Corp Bright polishing of cadmium and zinc
US3171765A (en) * 1962-10-04 1965-03-02 Conversion Chem Corp Powder composition for bright dipping zinc and cadmium
US3171767A (en) * 1963-09-30 1965-03-02 Conversion Chem Corp Composition and method for brightening cadmium and zinc
SE381289B (en) * 1973-06-21 1975-12-01 Nyby Bruk Ab TWO-STEP BETTING PROCEDURE
US7314671B1 (en) 1996-04-19 2008-01-01 Surtec International Gmbh Chromium(VI)-free conversion layer and method for producing it
DE19615664A1 (en) 1996-04-19 1997-10-23 Surtec Produkte Und Systeme Fu Chromium (VI) free chromate layer and process for its production
JP2003147544A (en) * 2001-11-07 2003-05-21 Nippon Parkerizing Co Ltd Surface treatment film of zinc plated film, surface treatment solution for zinc plated film, and surface treatment method
JP4446230B2 (en) * 2003-12-09 2010-04-07 ディップソール株式会社 Trivalent chromate solution for aluminum or aluminum alloy and method for forming corrosion-resistant film on aluminum or aluminum alloy surface using the same
US20110070429A1 (en) * 2009-09-18 2011-03-24 Thomas H. Rochester Corrosion-resistant coating for active metals
CN112538372B (en) 2019-09-23 2022-02-22 中国石油大学(北京) Integrated method and device for co-producing synthesis gas by catalytic cracking of heavy oil

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA481183A (en) * 1952-02-19 Aluminum Company Of America Surface treatment of magnesium and magnesium alloy articles
GB357887A (en) * 1930-12-23 1931-10-01 Chester T Neal Method of treating cadmium plated goods
US2194498A (en) * 1936-10-26 1940-03-26 Udylite Corp Method of brightening metals electronegative to iron
US2904413A (en) * 1954-06-23 1959-09-15 Jervis Corp Process of bright dipping zinc base alloys
US2904414A (en) * 1954-08-04 1959-09-15 Allied Res Products Inc Formulation for producing a protective bright chemically polished surface on zinc and cadmium
US2955027A (en) * 1957-08-07 1960-10-04 Isaac L Newell Method for the deburring of zinc-base die castings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144773A (en) * 1983-07-19 1985-03-13 Omi Int Corp Non-peroxide trivalent chromium passivation

Also Published As

Publication number Publication date
DE1207182B (en) 1965-12-16
US3072516A (en) 1963-01-08
USRE26130E (en) 1966-12-27

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