GB884684A - Process for improving the corrosion resistance of light metals and light metal alloys - Google Patents

Process for improving the corrosion resistance of light metals and light metal alloys

Info

Publication number
GB884684A
GB884684A GB24383/59A GB2438359A GB884684A GB 884684 A GB884684 A GB 884684A GB 24383/59 A GB24383/59 A GB 24383/59A GB 2438359 A GB2438359 A GB 2438359A GB 884684 A GB884684 A GB 884684A
Authority
GB
United Kingdom
Prior art keywords
acid
solution
rinsing
alkali
arsenic
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
GB24383/59A
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.)
Knapsack AG
Knapsack Griesheim AG
Original Assignee
Knapsack AG
Knapsack Griesheim AG
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 Knapsack AG, Knapsack Griesheim AG filed Critical Knapsack AG
Publication of GB884684A publication Critical patent/GB884684A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment
    • 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
    • C23C22/73—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 characterised by the process
    • 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Paints Or Removers (AREA)

Abstract

Chemical coatings on light metals are sealed by immersion in a very dilute aqueos solution containing no sulphur, of at least one compound of at least one of the elements-arsenic, antimony, selenium, tellurium, or bismuth, rinsing with water and rinsing the workpieces with a solution of a substance having a general formula:-CnH2n + 1SO2 NHRCOOX where n is 8-18, R is an alkyl radical containing 1-5 carbon atoms and X is a cation. The sealing solution which may be a solution of arsenic acid, antimonic acid, selenic acid, telluric acid, arsenious acid, antimonious acid, tellurous acid, or preferably selenious acid, or a mixture thereof, contains less than 2% oxide and has a pH of less than 9, preferably 5-7, controlled by additions of salts of strong or moderately strong acids such as sodium chloride, sodium phosphates, potassium fluoride, sodium sulphate, or mixtures thereof. It is maintained at 20-70 DEG C. and articles are dipped for 3-10 minutes. The rinsing solution may contain small quantities of hexavalent chromium in the form of alkali chromates, alkali bichromates, or chromic acid, and it may contain an aqueous or alcoholic solution of an organic complex compound such as cyclohexylamine. Its pH is maintained above 7, preferably 7,5-8,5 and its temperature at 70 to 90 DEG C. The coating may be further sealed by the application of a coating lacquer, varnish, fat, oil, or alkali silicate. The coloration produced by the sealing solution according the invention may be used for decorative purposes or for colourimetric control of the operation.
GB24383/59A 1958-07-17 1959-07-15 Process for improving the corrosion resistance of light metals and light metal alloys Expired GB884684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK35317A DE1137280B (en) 1958-07-17 1958-07-17 Process for compressing surface-treated workpieces made of light metals and light metal alloys to improve corrosion resistance and wear resistance

Publications (1)

Publication Number Publication Date
GB884684A true GB884684A (en) 1961-12-13

Family

ID=7220312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24383/59A Expired GB884684A (en) 1958-07-17 1959-07-15 Process for improving the corrosion resistance of light metals and light metal alloys

Country Status (4)

Country Link
US (1) US3032435A (en)
DE (1) DE1137280B (en)
FR (1) FR1230819A (en)
GB (1) GB884684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137657A (en) * 1983-03-24 1984-10-10 Tec A Systems S A S Di Portiol Sealing anodized surfaces of aluminium work pieces

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247026A (en) * 1962-02-20 1966-04-19 Continental Can Co Process of producing an oxide coating on magnesium-aluminum alloys
US3345276A (en) * 1963-12-23 1967-10-03 Ibm Surface treatment for magnesiumlithium alloys
US3374155A (en) * 1965-02-19 1968-03-19 Ludwig J. Weber Modified oxide-coated aluminum and the method of modifying
US3414489A (en) * 1966-01-13 1968-12-03 Bell Aerospace Corp Bondable coating on aluminum and method of applying it
US3619249A (en) * 1968-08-05 1971-11-09 Mc Donnell Douglas Corp A method for producing a fluorocarbon coating on metals and ceramics and the product thereof
DE2718364C3 (en) * 1977-04-25 1980-02-07 Mannesmannroehren-Werke Ag, 4000 Duesseldorf Process for the corrosion protection of iron and steel by phosphating and post-treatment with an anti-rust oil
US4504325A (en) * 1982-03-19 1985-03-12 The Boeing Company Method for sealing an aluminum oxide film
DE3528180A1 (en) * 1985-08-06 1987-02-19 Heinz Georg Baus METHOD FOR ANODIC HARDOXIDATION
JP7352893B2 (en) 2019-06-21 2023-09-29 Ykk株式会社 Aluminum alloy fastening member and method for manufacturing aluminum alloy fastening member

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018388A (en) * 1930-08-11 1935-10-22 Aluminum Colors Inc Treating aluminum and aluminum alloy surfaces
US1988012A (en) * 1932-10-27 1935-01-15 Aluminum Co Of America Metal deposites in oxide coatings
US2313753A (en) * 1938-11-14 1943-03-16 Dow Chemical Co Method of treating magnesium and its alloys
US2313755A (en) * 1938-12-02 1943-03-16 Dow Chemical Co Method of producing protective coatings upon magnesium and its alloys
US2798830A (en) * 1953-08-04 1957-07-09 American Chem Paint Co Method of improving the corrosion resistance of certain coated aluminum surfaces
US2785098A (en) * 1955-01-26 1957-03-12 Horizons Inc Treating of aluminum and aluminum alloy surfaces
US2846343A (en) * 1955-09-21 1958-08-05 Walter A Mason Product and method for effecting a cold chemical oxidation of aluminum and its alloys
US2880148A (en) * 1955-11-17 1959-03-31 Harry A Evangelides Method and bath for electrolytically coating magnesium
US2861019A (en) * 1956-06-07 1958-11-18 Dow Chemical Co Chromate-coating magnesium and its alloys
US2930106A (en) * 1957-03-14 1960-03-29 American Felt Co Gaskets
US2898490A (en) * 1957-12-23 1959-08-04 Gen Electric Target plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137657A (en) * 1983-03-24 1984-10-10 Tec A Systems S A S Di Portiol Sealing anodized surfaces of aluminium work pieces

Also Published As

Publication number Publication date
US3032435A (en) 1962-05-01
FR1230819A (en) 1960-09-20
DE1137280B (en) 1962-09-27

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