GB655699A - Improvements in or relating to the brightening of surfaces of aluminium or aluminiumalloy - Google Patents

Improvements in or relating to the brightening of surfaces of aluminium or aluminiumalloy

Info

Publication number
GB655699A
GB655699A GB24344/48A GB2434448A GB655699A GB 655699 A GB655699 A GB 655699A GB 24344/48 A GB24344/48 A GB 24344/48A GB 2434448 A GB2434448 A GB 2434448A GB 655699 A GB655699 A GB 655699A
Authority
GB
United Kingdom
Prior art keywords
article
per cent
solution
aluminium
phosphate
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
GB24344/48A
Inventor
Jean Frasch
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.)
PROD CHIM DESTERRES RARES SOC
Original Assignee
PROD CHIM DESTERRES RARES SOC
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 PROD CHIM DESTERRES RARES SOC filed Critical PROD CHIM DESTERRES RARES SOC
Publication of GB655699A publication Critical patent/GB655699A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/16—Pretreatment, e.g. desmutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S205/00—Electrolysis: processes, compositions used therein, and methods of preparing the compositions
    • Y10S205/917—Treatment of workpiece between coating steps

Abstract

655,699. Brightening chromium or aluminium alloys electrolytically. SOC. DE PRODUITS CHIMIQUES DESTERRES RARES. Sept. 16, 1948, No. 24344. Convention date, Sept. 24, 1947. [Class 41] A process of brightening the surface of an article of aluminium or aluminium alloy comprises degreasing the surface, immersing the article in a strongly acid phospho-chromic solution, submitting the article as anode to electrolyte treatment in an alkaline bath containing phosphate and aluminate ions, immersing the article again in a strongly acid phospho-chromic solution, and submitting the article to anodic oxidation in an acid electrolyte. The first-mentioned strongly acid solution preferably contains about 30 to 35 per cent phosphoric acid and about 10 to 15 per cent chromic acid and has a pH value below 1. The article may be degreased electrolytically in a solution of 5 per cent sodium carbonate, 5 per cent sodium phosphate and 2 per cent sodium silicate at room temperature,. with a voltage of 10 to 12 volts. The bath containing phosphate and aluminate ions may be prepared by dissolving trisodium phosphate and sodium aluminate in water or by dissolving aluminium phosphate in caustic soda solution. Potassium compounds may be used instead of sodium compounds. The anodized article may be sealed in boiling water or in an aqueous solution of nickel acetate.
GB24344/48A 1947-09-24 1948-09-16 Improvements in or relating to the brightening of surfaces of aluminium or aluminiumalloy Expired GB655699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR966790T 1947-09-24

Publications (1)

Publication Number Publication Date
GB655699A true GB655699A (en) 1951-08-01

Family

ID=9500215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24344/48A Expired GB655699A (en) 1947-09-24 1948-09-16 Improvements in or relating to the brightening of surfaces of aluminium or aluminiumalloy

Country Status (7)

Country Link
US (1) US2647865A (en)
BE (1) BE484777A (en)
CH (1) CH280488A (en)
FR (1) FR966790A (en)
GB (1) GB655699A (en)
IT (1) IT454258A (en)
NL (1) NL71913C (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721835A (en) * 1951-07-07 1955-10-25 Shwayder Bros Inc Surface treatment of aluminum articles
US2705500A (en) * 1953-11-04 1955-04-05 Leon L Deer Cleaning aluminum
DE1178946B (en) * 1957-04-24 1964-10-01 Siemens Ag Etching liquid for the electrolytic roughening of aluminum anodes for electrolytic capacitors
US2941930A (en) * 1957-05-28 1960-06-21 Reynolds Metals Co Decorative aluminum surface
US3041259A (en) * 1959-07-31 1962-06-26 Hanson Van Winkle Munning Co Cleaning aluminum surfaces
US4647315A (en) * 1985-07-01 1987-03-03 Olin Corporation Copper stainproofing technique
US4961828A (en) * 1989-04-05 1990-10-09 Olin Corporation Treatment of metal foil
US5057193A (en) * 1989-04-05 1991-10-15 Olin Corporation Anti-tarnish treatment of metal foil
US4952285A (en) * 1989-04-14 1990-08-28 Olin Corporation Anti-tarnish treatment of metal foil
DE3917186A1 (en) * 1989-05-26 1990-11-29 Happich Gmbh Gebr CHEMICAL METHOD FOR AVOIDING A RAINBOW EFFECT Caused By The Oxide Layer Formed In The Shining Of Parts Of Aluminum Or Aluminum Alloys
DE3917188A1 (en) * 1989-05-26 1990-11-29 Happich Gmbh Gebr PROCESS FOR PRODUCING COLORED SURFACES ON PARTS OF ALUMINUM OR ALUMINUM ALLOYS
US5022968A (en) * 1990-09-20 1991-06-11 Olin Corporation Method and composition for depositing a chromium-zinc anti-tarnish coating on copper foil
US5098796A (en) * 1989-10-13 1992-03-24 Olin Corporation Chromium-zinc anti-tarnish coating on copper foil
US5250363A (en) * 1989-10-13 1993-10-05 Olin Corporation Chromium-zinc anti-tarnish coating for copper foil having a dark color
US5230932A (en) * 1989-10-13 1993-07-27 Olin Corporation Chromium-zinc anti-tarnish coating for copper foil
US5071520A (en) * 1989-10-30 1991-12-10 Olin Corporation Method of treating metal foil to improve peel strength
US5164235A (en) * 1990-03-06 1992-11-17 Olin Corporation Anti-tarnish treatment of metal foil
CA2086512A1 (en) * 1990-07-02 1992-01-03 Chung-Yao Chao Rinsing of copper foil after anti-tarnish treatment
CN114855240A (en) * 2022-05-17 2022-08-05 山东南山铝业股份有限公司 Medium-temperature hole sealing hydration experiment process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL64809B (en) * 1932-05-26
GB449162A (en) * 1934-12-17 1936-06-17 Alfred Norman Douglas Pullen Improvements in and relating to the surface treatment of aluminium and aluminium alloys
DE688668C (en) * 1937-03-20 1940-02-28 Langbein Pfanhauser Werke Akt Process for producing shiny surfaces on aluminum and its alloys
US2153060A (en) * 1938-07-01 1939-04-04 Aluminum Co Of America Process for producing reflective aluminum surfaces
GB558925A (en) * 1942-07-23 1944-01-27 Ernest Windsor Bowen Improvements in and relating to the electrolytic treatment of aluminium and aluminium base alloys
US2353786A (en) * 1943-11-01 1944-07-18 Russell J Horsefield Solution and method for stripping oxide films from aluminum and its alloys

Also Published As

Publication number Publication date
US2647865A (en) 1953-08-04
BE484777A (en)
NL71913C (en)
CH280488A (en) 1952-01-31
FR966790A (en) 1950-10-18
IT454258A (en)

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