GB792739A - Methods and materials for the deoxidation of aluminium surfaces - Google Patents

Methods and materials for the deoxidation of aluminium surfaces

Info

Publication number
GB792739A
GB792739A GB14299/56A GB1429956A GB792739A GB 792739 A GB792739 A GB 792739A GB 14299/56 A GB14299/56 A GB 14299/56A GB 1429956 A GB1429956 A GB 1429956A GB 792739 A GB792739 A GB 792739A
Authority
GB
United Kingdom
Prior art keywords
acid
fluoride
ammonium
potassium
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
GB14299/56A
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.)
Henkel Corp
Original Assignee
Amchem 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 Amchem Products Inc filed Critical Amchem Products Inc
Publication of GB792739A publication Critical patent/GB792739A/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
    • C23C22/73—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
    • C23C22/77—Controlling or regulating of the coating 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12—Light metals
    • C23G1/125—Light metals aluminium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

An aqueous solution for de-oxidizing aluminium surfaces has a pH of 0.5-1.0 and contains hexavalent chromium in a concentration of 10-100 g/l., calculated as CrO3, and fluoride ions in such proportion between 0.1 and 0.6 g/l., calculated as HF, that the solution has an activity, i.e. ability to attack soda-glass, between the activities shown by solutions consisting of (a) chromic acid 30g., hydrofluoric acid (48.8 per cent) 0.25 ml., and water to make 1 litre, and (b) chromic acid 30g., hydrofluoric acid (48.8 per cent) 1.0 ml., and water to make 1 litre. The hexavalent chromium may be introduced as chromic acid or soluble salts thereof, such as potassium dichromate, ammonium dichromate, ammonium chromate and sodium chromate. The fluoride source may be hydrofluoric acid, simple salts thereof such as sodium, ammonium, or potassium fluoride, complex-fluoride acid such as fluoboric or fluosilicic acid or soluble salts thereof such as sodium silicofluoride potassium fluosilicate, potassium zirconium fluoride or ammonium silicofluoride. The pH of the solution may be adjusted by addition of acid, e.g. nitric acid. After deoxidizing, the aluminium may be coated using a fluoride-chromate coating solution.
GB14299/56A 1955-09-12 1956-05-08 Methods and materials for the deoxidation of aluminium surfaces Expired GB792739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US533903A US2867514A (en) 1955-09-12 1955-09-12 Method of deoxidizing an aluminum surface

Publications (1)

Publication Number Publication Date
GB792739A true GB792739A (en) 1958-04-02

Family

ID=24127910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14299/56A Expired GB792739A (en) 1955-09-12 1956-05-08 Methods and materials for the deoxidation of aluminium surfaces

Country Status (2)

Country Link
US (1) US2867514A (en)
GB (1) GB792739A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108919A (en) * 1959-06-17 1963-10-29 North American Aviation Inc Etching process
US3074824A (en) * 1962-03-16 1963-01-22 Aluminum Co Of America Removing flux residues
US3367799A (en) * 1963-10-08 1968-02-06 Army Usa Process for cleaning aluminum
US3239440A (en) * 1964-11-23 1966-03-08 Titanium Metals Corp Electrolytic pickling of titanium and titanium base alloy articles
GB1243424A (en) * 1969-02-17 1971-08-18 Pyrene Co Ltd Cleaning and brightening of aluminium surfaces
FR2288392A1 (en) * 1974-10-18 1976-05-14 Radiotechnique Compelec PROCESS FOR THE EMBODIMENT OF SEMICONDUCTOR DEVICES
JPS6039169A (en) * 1983-08-12 1985-02-28 Nippon Light Metal Co Ltd Hydrophilic surface treating agent for metal
US4851077A (en) * 1988-05-19 1989-07-25 Mcdonnell Douglas Corporation Chemical milling of lithium aluminum alloy
US5052421A (en) * 1988-07-19 1991-10-01 Henkel Corporation Treatment of aluminum with non-chrome cleaner/deoxidizer system followed by conversion coating
US5227016A (en) * 1992-02-25 1993-07-13 Henkel Corporation Process and composition for desmutting surfaces of aluminum and its alloys
US9683293B2 (en) * 2013-08-07 2017-06-20 The Boeing Company Reduction of chromium waste water in an aluminum conversion coat processing line
CN105624700B (en) * 2015-12-29 2018-05-25 浙江师范大学 A kind of acidity aluminium alloy adhesive remover and its preparation method and application

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US716977A (en) * 1901-07-27 1902-12-30 John A Gilliam Process of purifying aluminium.
US2357991A (en) * 1941-11-12 1944-09-12 Wingfoot Corp Treatment of magnesium
US2593448A (en) * 1949-07-25 1952-04-22 Kaiser Aluminium Chem Corp Method and composition for treating aluminum and aluminum alloys
US2613165A (en) * 1950-07-03 1952-10-07 Aluminum Co Of America Surface treatment of magnesium and magnesium alloy articles
US2655439A (en) * 1952-12-15 1953-10-13 Ryan Aeronautical Co Compounded fluoborate chemical surface treatment of aluminum and aluminum alloys

Also Published As

Publication number Publication date
US2867514A (en) 1959-01-06

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