GB880780A - A method of reviving a bath for the treatment of articles of aluminium or its alloys to effect brightening thereof - Google Patents

A method of reviving a bath for the treatment of articles of aluminium or its alloys to effect brightening thereof

Info

Publication number
GB880780A
GB880780A GB29295/60A GB2929560A GB880780A GB 880780 A GB880780 A GB 880780A GB 29295/60 A GB29295/60 A GB 29295/60A GB 2929560 A GB2929560 A GB 2929560A GB 880780 A GB880780 A GB 880780A
Authority
GB
United Kingdom
Prior art keywords
aluminium
bath
articles
reviving
alloys
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
GB29295/60A
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.)
SAMUEL LENARD COHN
Original Assignee
SAMUEL LENARD COHN
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 SAMUEL LENARD COHN filed Critical SAMUEL LENARD COHN
Publication of GB880780A publication Critical patent/GB880780A/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
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C23F3/03—Light metals with acidic solutions

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)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

A bath for brightening aluminium and aluminium-alloy articles which contains phosphoric acid, nitric acid and water and which has become ineffective through accumulation of dissolved aluminium is revived by the addition of sulphuric acid in an amount sufficient to maintain the dissolved aluminium in solution at the temperature of operation of the bath. The addition of concentrated sulphuric acid to the extent of 3% of the volume of the bath is usually sufficient. U.S.A. Specification 2,729,551 also is referred to.
GB29295/60A 1956-10-16 1957-10-04 A method of reviving a bath for the treatment of articles of aluminium or its alloys to effect brightening thereof Expired GB880780A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US880780XA 1956-10-16 1956-10-16

Publications (1)

Publication Number Publication Date
GB880780A true GB880780A (en) 1961-10-25

Family

ID=22209275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29295/60A Expired GB880780A (en) 1956-10-16 1957-10-04 A method of reviving a bath for the treatment of articles of aluminium or its alloys to effect brightening thereof

Country Status (1)

Country Link
GB (1) GB880780A (en)

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