GB958499A - Chemical brightening and electrolytic polishing of aluminium - Google Patents

Chemical brightening and electrolytic polishing of aluminium

Info

Publication number
GB958499A
GB958499A GB1945560A GB1945560A GB958499A GB 958499 A GB958499 A GB 958499A GB 1945560 A GB1945560 A GB 1945560A GB 1945560 A GB1945560 A GB 1945560A GB 958499 A GB958499 A GB 958499A
Authority
GB
United Kingdom
Prior art keywords
bath
h2so4
h3po4
electrolytic polishing
aluminium
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
GB1945560A
Inventor
Alexander Cybriwsky
Nicholas Mostovych
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.)
Reynolds Metals Co
Original Assignee
Reynolds Metals Co
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 Reynolds Metals Co filed Critical Reynolds Metals Co
Priority to GB1945560A priority Critical patent/GB958499A/en
Publication of GB958499A publication Critical patent/GB958499A/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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

A bath for electrolytic polishing or chemical brightening the surface of an aluminium or aluminium alloy article consists of sulphuric acid, phosphoric acid and/or an acid salt thereof and water, corresponding to a mixture of H2SO4 of s.g. 1.84 and H3PO4 of s.g. 1.72 in volume ratios at 72 DEG F. ranging from 70% H2SO4 over 30% H3PO4 to 85% H2SO4 over 15% H3PO4, the total water-free acid content of the bath being 88.4-90.5% by volume. The bath may additionally contain 0.001-0.01% by weight of a silver salt such as the nitrate or cyanide, and the H2SO4 may be partly replaced by an alkali metal salt thereof such as the sulphate or bisulphate. The article is dipped into the bath heated to 200-300 DEG F., e.g. for chemical brightening at least 230 DEG F. and for electrolytic polishing at most 250 DEG F. A combination process may be effected in the one bath heated to 230-250 DEG F. by first immersing the article without the passage of an electric current, then turning on the current, e.g. using 8-15 volts with 40-150 A.S.F. for polishing. After treatment, a protective film may be applied by anodizing before drying or lacquering after drying.
GB1945560A 1960-06-01 1960-06-01 Chemical brightening and electrolytic polishing of aluminium Expired GB958499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1945560A GB958499A (en) 1960-06-01 1960-06-01 Chemical brightening and electrolytic polishing of aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1945560A GB958499A (en) 1960-06-01 1960-06-01 Chemical brightening and electrolytic polishing of aluminium

Publications (1)

Publication Number Publication Date
GB958499A true GB958499A (en) 1964-05-21

Family

ID=10129652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1945560A Expired GB958499A (en) 1960-06-01 1960-06-01 Chemical brightening and electrolytic polishing of aluminium

Country Status (1)

Country Link
GB (1) GB958499A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition
WO1999013134A1 (en) * 1997-09-09 1999-03-18 Norsk Hydro Asa A procedure for electrochemical polishing of an aluminium substrate to obtain a specular surface thereof
CN102747411A (en) * 2012-07-02 2012-10-24 重庆大学 Electrolytic polishing solution for aluminum or aluminum alloy and electrolytic polishing method
CN105200431A (en) * 2015-10-13 2015-12-30 深圳市沙特尔工业材料有限公司 Aluminium product polishing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition
WO1999013134A1 (en) * 1997-09-09 1999-03-18 Norsk Hydro Asa A procedure for electrochemical polishing of an aluminium substrate to obtain a specular surface thereof
US6428682B1 (en) 1997-09-09 2002-08-06 Norsk Hydro Asa Procedure for electrochemical polishing of an aluminium substrate to obtain a specular surface
CN102747411A (en) * 2012-07-02 2012-10-24 重庆大学 Electrolytic polishing solution for aluminum or aluminum alloy and electrolytic polishing method
CN102747411B (en) * 2012-07-02 2015-03-11 重庆大学 Electrolytic polishing solution for aluminum or aluminum alloy and electrolytic polishing method
CN105200431A (en) * 2015-10-13 2015-12-30 深圳市沙特尔工业材料有限公司 Aluminium product polishing method

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