ES349360A1 - Chemical coating process for metal - Google Patents

Chemical coating process for metal

Info

Publication number
ES349360A1
ES349360A1 ES349360A ES349360A ES349360A1 ES 349360 A1 ES349360 A1 ES 349360A1 ES 349360 A ES349360 A ES 349360A ES 349360 A ES349360 A ES 349360A ES 349360 A1 ES349360 A1 ES 349360A1
Authority
ES
Spain
Prior art keywords
treatment
acid
fluoboric
acid pre
solution
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
ES349360A
Other languages
Spanish (es)
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.)
Continentale Parker SA
Original Assignee
Continentale Parker SA
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 Continentale Parker SA filed Critical Continentale Parker SA
Publication of ES349360A1 publication Critical patent/ES349360A1/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
    • C23C22/78—Pretreatment of the material to be coated

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 ferrous surface is chromated by first subjecting to an acid pre-treatment, and then contacting with an aqueous solution (pH 1 to 2À5) containing (% by weight) at least 0À05 hexavalent chromium, 0À01 to 0À5 fluoride ions, and 0À001 to 0À5 complex cyanide, the pH being maintained by adding fluoboric acid. By omitting the acid pre-treatment step and the addition of fluoboric acid, the solution may be used to coat aluminium and zinc surfaces. The acid pre-treatment may be with phosphoric, hydrofluoric, sulphuric, nitric, hydrochloric or fluoboric acids. The acid pre-treatment may be combined with a preliminary cleaning step by using a solution of a phosphate and a wetting agent. The cyanide may be ferricyanic or ferrocyanic acids or water soluble salts thereof. The coating may be given a hexavalent chromium rinse.
ES349360A 1967-01-16 1968-01-16 Chemical coating process for metal Expired ES349360A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60929467A 1967-01-16 1967-01-16

Publications (1)

Publication Number Publication Date
ES349360A1 true ES349360A1 (en) 1969-04-01

Family

ID=24440171

Family Applications (1)

Application Number Title Priority Date Filing Date
ES349360A Expired ES349360A1 (en) 1967-01-16 1968-01-16 Chemical coating process for metal

Country Status (9)

Country Link
US (1) US3505129A (en)
AT (1) AT269589B (en)
BE (1) BE708489A (en)
DE (1) DE1621492A1 (en)
ES (1) ES349360A1 (en)
FR (1) FR1548966A (en)
GB (1) GB1144019A (en)
NL (1) NL6800248A (en)
SE (1) SE347028B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895969A (en) * 1971-04-26 1975-07-22 J M Eltzroth And Associates In Composition and process for inhibiting corrosion of non-ferrous metal surfaced articles and providing surface for synthetic resin coating compositions
US3985585A (en) * 1973-09-21 1976-10-12 J. N. Tuttle, Inc. Process for treating aluminum with ferricyanide compound
DE10130441B4 (en) * 2001-06-23 2005-01-05 Uhde Gmbh Process for producing gas diffusion electrodes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2114151A (en) * 1935-07-09 1938-04-12 American Chem Paint Co Art of finishing ferrous metal
US2357219A (en) * 1942-01-10 1944-08-29 Joseph P Moran Corrosion-resistant ferrous alloys
GB714541A (en) * 1951-06-27 1954-09-01 American Chem Paint Co Method of and materials for producing paint-bonding surfaces on metal
US2796370A (en) * 1955-03-04 1957-06-18 Charles W Ostrander Composition and method for producing corrosion resistant protective coating on aluminum and aluminum alloys
GB990352A (en) * 1963-08-15 1965-04-28 Pyrene Co Ltd Improvements relating to the chromating of aluminium

Also Published As

Publication number Publication date
SE347028B (en) 1972-07-24
AT269589B (en) 1969-03-25
NL6800248A (en) 1968-07-17
DE1621492A1 (en) 1970-07-23
BE708489A (en) 1968-05-02
US3505129A (en) 1970-04-07
GB1144019A (en) 1969-03-05
FR1548966A (en) 1968-12-06

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