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GB1033990A - A process for chemical oxidation for aluminium powder, magnesium powder as well as aluminium and magnesium powder alloys - Google Patents

A process for chemical oxidation for aluminium powder, magnesium powder as well as aluminium and magnesium powder alloys

Info

Publication number
GB1033990A
GB1033990A GB46160/63A GB4616063A GB1033990A GB 1033990 A GB1033990 A GB 1033990A GB 46160/63 A GB46160/63 A GB 46160/63A GB 4616063 A GB4616063 A GB 4616063A GB 1033990 A GB1033990 A GB 1033990A
Authority
GB
United Kingdom
Prior art keywords
aluminium
powder
magnesium powder
alloys
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
GB46160/63A
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.)
ANNEMARIE MARX
Original Assignee
ANNEMARIE MARX
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
Priority claimed from AT972462A external-priority patent/AT236729B/en
Priority claimed from AT793463A external-priority patent/AT240128B/en
Application filed by ANNEMARIE MARX filed Critical ANNEMARIE MARX
Publication of GB1033990A publication Critical patent/GB1033990A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation

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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

Aluminium or magnesium powders or their powder alloys are oxidized using a solution of chromic anhydride nitric acid, hydrofluoric acid, and water, at a temperature between room temperature and 70 DEG C. for from 1 to 5 minutes. The solution may comprise chromic anhydride 150 g., conc. nitric acid 10 to 50 g., hydrofluoric acid 40%. 5 to 25 g., water 1000 ml. The powder may be a suspension in water, and the solution added whilst stiring. The mixture is then filtered, washed, and dried with acetone. The solution should have a pH between 5 and 5.5 after use.
GB46160/63A 1962-12-13 1963-11-22 A process for chemical oxidation for aluminium powder, magnesium powder as well as aluminium and magnesium powder alloys Expired GB1033990A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT972462A AT236729B (en) 1962-12-13 1962-12-13 Process for the chemical oxidation of magnesium powder
AT793463A AT240128B (en) 1963-10-03 1963-10-03 Process for the chemical oxidation of aluminum powders or aluminum alloy powders

Publications (1)

Publication Number Publication Date
GB1033990A true GB1033990A (en) 1966-06-22

Family

ID=25604229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46160/63A Expired GB1033990A (en) 1962-12-13 1963-11-22 A process for chemical oxidation for aluminium powder, magnesium powder as well as aluminium and magnesium powder alloys

Country Status (2)

Country Link
DE (1) DE1294139B (en)
GB (1) GB1033990A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549086B1 (en) * 1983-06-21 1987-02-20 Pechiney Electro Metallurg PROCESS FOR DRY PASSIVATION OF MAGNESIUM IN DIVIDED CONDITIONS
EP0305560B1 (en) * 1987-08-31 1991-06-26 Nippon Paint Co., Ltd. Metal particle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE821908C (en) * 1950-03-03 1951-11-22 Vaw Ver Aluminium Werke Ag Process for the aftertreatment of anodically oxidized layers on aluminum and aluminum alloys
GB748372A (en) * 1952-09-19 1956-05-02 Elsa Bjoerkluend A method for inactivating metallic powder
GB910134A (en) * 1959-09-19 1962-11-07 P M D Chemicals Ltd Improvements in or relating to the coating of aluminium surfaces

Also Published As

Publication number Publication date
DE1294139B (en) 1969-04-30

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