GB740880A - Improvements in or relating to composition and process for the chemical brightening of aluminium - Google Patents

Improvements in or relating to composition and process for the chemical brightening of aluminium

Info

Publication number
GB740880A
GB740880A GB163954A GB163954A GB740880A GB 740880 A GB740880 A GB 740880A GB 163954 A GB163954 A GB 163954A GB 163954 A GB163954 A GB 163954A GB 740880 A GB740880 A GB 740880A
Authority
GB
United Kingdom
Prior art keywords
aluminium
ammonium
fluoride
phosphate
acid
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
GB163954A
Inventor
Frederick Harold Hesch
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.)
Kaiser Aluminum and Chemical Corp
Original Assignee
Kaiser Aluminum and Chemical Corp
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 Kaiser Aluminum and Chemical Corp filed Critical Kaiser Aluminum and Chemical Corp
Priority to GB163954A priority Critical patent/GB740880A/en
Publication of GB740880A publication Critical patent/GB740880A/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)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

An acid aqueous solution for the chemical brightening of aluminium and aluminium alloys contains hydrogen, fluoride and phosphate ions in amount strichiometrically equivalent to, by weight of the solution, 0.5-5 per cent nitric acid, 0.01-5 per cent hydrofluoric acid and 0.5-1 per cent orthophosphoric acid. Ammonium ions are preferably also present, as are ions of a metal electropositive to aluminium, e.g. Cu, Ag, Fe, Ni, Co, An or Pt. The hydrogen ion concentration is preferably maintained by the use of nitric acid; fluoride may be introduced as hydrofluoric acid, ammonium fluoride or ammonium bifluoride; phosphate as orthophosphoric acid or ammonium phosphate; ammonium ions as fluoride, phosphate, hydroxide or nitrate; copper as copper nitrate. The bath may be operated from 100 DEG F. to boiling point.
GB163954A 1951-05-08 1951-05-08 Improvements in or relating to composition and process for the chemical brightening of aluminium Expired GB740880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB163954A GB740880A (en) 1951-05-08 1951-05-08 Improvements in or relating to composition and process for the chemical brightening of aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB163954A GB740880A (en) 1951-05-08 1951-05-08 Improvements in or relating to composition and process for the chemical brightening of aluminium

Publications (1)

Publication Number Publication Date
GB740880A true GB740880A (en) 1955-11-23

Family

ID=9725428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB163954A Expired GB740880A (en) 1951-05-08 1951-05-08 Improvements in or relating to composition and process for the chemical brightening of aluminium

Country Status (1)

Country Link
GB (1) GB740880A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725683A (en) * 1996-03-28 1998-03-10 Aluminum Company Of America Manufacturing clear coated aluminum alloy lighting sheet
WO2001032959A2 (en) * 1999-11-04 2001-05-10 Alcan International Limited Method of producing an aluminium surface with a high total reflectance
CN106435612A (en) * 2016-07-01 2017-02-22 中航飞机股份有限公司西安飞机分公司 Method for stabilizing aluminum alloy pickling solution with ammonium ions as complexing agent

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725683A (en) * 1996-03-28 1998-03-10 Aluminum Company Of America Manufacturing clear coated aluminum alloy lighting sheet
WO2001032959A2 (en) * 1999-11-04 2001-05-10 Alcan International Limited Method of producing an aluminium surface with a high total reflectance
WO2001032959A3 (en) * 1999-11-04 2001-09-20 Alcan Int Ltd Method of producing an aluminium surface with a high total reflectance
US7169315B1 (en) 1999-11-04 2007-01-30 Novelis, Inc. Method of producing an aluminium surface with a high total reflectance
CN106435612A (en) * 2016-07-01 2017-02-22 中航飞机股份有限公司西安飞机分公司 Method for stabilizing aluminum alloy pickling solution with ammonium ions as complexing agent

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