GB858378A - Method of removing iron impurities from aluminium surface - Google Patents

Method of removing iron impurities from aluminium surface

Info

Publication number
GB858378A
GB858378A GB3339/59A GB333959A GB858378A GB 858378 A GB858378 A GB 858378A GB 3339/59 A GB3339/59 A GB 3339/59A GB 333959 A GB333959 A GB 333959A GB 858378 A GB858378 A GB 858378A
Authority
GB
United Kingdom
Prior art keywords
iron impurities
removing iron
soluble
aluminium surface
ion
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
GB3339/59A
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.)
Howmet Aerospace Inc
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Publication of GB858378A publication Critical patent/GB858378A/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
    • 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
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition

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)
  • ing And Chemical Polishing (AREA)

Abstract

A solution for the removal of iron impurities from aluminium or aluminium alloy surfaces contains a soluble citrate ion together with either a soluble nitrate ion or a soluble sulphite ion, the pH value of the solution being below 2.75 in the former case, or below 7.0 in the latter. The surfaces may be treated by immersion or by spraying, and the solutions may be used at ambient or elevated temperatures.
GB3339/59A 1958-02-07 1959-01-30 Method of removing iron impurities from aluminium surface Expired GB858378A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US858378XA 1958-02-07 1958-02-07

Publications (1)

Publication Number Publication Date
GB858378A true GB858378A (en) 1961-01-11

Family

ID=22194269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3339/59A Expired GB858378A (en) 1958-02-07 1959-01-30 Method of removing iron impurities from aluminium surface

Country Status (1)

Country Link
GB (1) GB858378A (en)

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