FR2384037A1 - Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate - Google Patents

Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate

Info

Publication number
FR2384037A1
FR2384037A1 FR7708614A FR7708614A FR2384037A1 FR 2384037 A1 FR2384037 A1 FR 2384037A1 FR 7708614 A FR7708614 A FR 7708614A FR 7708614 A FR7708614 A FR 7708614A FR 2384037 A1 FR2384037 A1 FR 2384037A1
Authority
FR
France
Prior art keywords
bath
pref
alloys
alternating current
stannous sulphate
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.)
Granted
Application number
FR7708614A
Other languages
French (fr)
Other versions
FR2384037B1 (en
Inventor
Pierre Reviglio
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.)
NICE ANODISATION SA
Original Assignee
NICE ANODISATION SA
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 NICE ANODISATION SA filed Critical NICE ANODISATION SA
Priority to FR7708614A priority Critical patent/FR2384037A1/en
Publication of FR2384037A1 publication Critical patent/FR2384037A1/en
Application granted granted Critical
Publication of FR2384037B1 publication Critical patent/FR2384037B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • C25D11/22—Electrolytic after-treatment for colouring layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/18—Regeneration of process solutions of electrolytes

Abstract

The process uses a.c. and a bath of the 'barrier layer' type contg. tin sulphate, esp. stannous sulphate; a mixt. of lactic- and salicylic- acids; H2SO4 added to keep the pH near to 1; metacresol-sulphuric acid and an equal amt. of pure metacresol; and an antioxidant. Continuous filtration of the bath is used with decantation for partial removal of sediment. The antioxidant is pref. a biphenol; hydroquinone; a pyrocatechol; or formaldehyde; and filtration pref. treats 50% of the bath vol. each hour. The a.c. is pref. at 17 volts; and the counter-electrode is pref. made of a non-oxidisable metal. The bath acts rapidly to obtain dark bronze or black colours which have improved stability to light or corrosion as compared with conventional colouring baths.
FR7708614A 1977-03-17 1977-03-17 Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate Granted FR2384037A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7708614A FR2384037A1 (en) 1977-03-17 1977-03-17 Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7708614A FR2384037A1 (en) 1977-03-17 1977-03-17 Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate

Publications (2)

Publication Number Publication Date
FR2384037A1 true FR2384037A1 (en) 1978-10-13
FR2384037B1 FR2384037B1 (en) 1980-04-18

Family

ID=9188437

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7708614A Granted FR2384037A1 (en) 1977-03-17 1977-03-17 Electrolytic colouring of anodised aluminium and its alloys - using alternating current and bath contg. stannous sulphate

Country Status (1)

Country Link
FR (1) FR2384037A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401525A (en) * 1978-11-18 1983-08-30 Th. Goldschmidt Ag Process for coloring aluminum electrolytically with metal salts
EP0354365A1 (en) * 1988-07-19 1990-02-14 Henkel Kommanditgesellschaft auf Aktien Process for electrolytically colouring anodised aluminium surfaces with metal salts
WO1992007976A1 (en) * 1990-10-29 1992-05-14 Henkel Kommanditgesellschaft Auf Aktien Electrolyte additive for a colorant bath for colouring aluminium and process for colouring aluminium
US5409685A (en) * 1991-06-20 1995-04-25 Henkel Kommanditgesellschaft Auf Aktien Manufactured tin(II) sulfate granules for electrolytic coloring with metal salts
US5587063A (en) * 1992-12-24 1996-12-24 Henkel Kommanditgesellschaft Auf Aktien Method for electrolytic coloring of aluminum surfaces using alternating current
EP1252374A1 (en) * 1999-11-25 2002-10-30 Enthone-Omi Inc. Process for the extended use of electrolytes
US6797141B1 (en) 1999-11-25 2004-09-28 Enthone Inc. Removal of coagulates from a non-glare electroplating bath

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401525A (en) * 1978-11-18 1983-08-30 Th. Goldschmidt Ag Process for coloring aluminum electrolytically with metal salts
EP0354365A1 (en) * 1988-07-19 1990-02-14 Henkel Kommanditgesellschaft auf Aktien Process for electrolytically colouring anodised aluminium surfaces with metal salts
AU608992B2 (en) * 1988-07-19 1991-04-18 Henkel Kommanditgesellschaft Auf Aktien Electrolytic process for colouring anodized aluminium surfaces with metal salts
US5064512A (en) * 1988-07-19 1991-11-12 Henkel Kommanditgesellschaft Auf Aktien Process for dyeing anodized aluminum
WO1992007976A1 (en) * 1990-10-29 1992-05-14 Henkel Kommanditgesellschaft Auf Aktien Electrolyte additive for a colorant bath for colouring aluminium and process for colouring aluminium
AU646508B2 (en) * 1990-10-29 1994-02-24 Henkel Kommanditgesellschaft Auf Aktien Electrolyte additive for a colorant bath for colouring aluminium and process for colouring aluminium
US5409592A (en) * 1990-10-29 1995-04-25 Henkel Kommanditgesellschaft Auf Aktien Electrolyte additive for a colorant bath for coloring aluminum and process for coloring aluminum
US5409685A (en) * 1991-06-20 1995-04-25 Henkel Kommanditgesellschaft Auf Aktien Manufactured tin(II) sulfate granules for electrolytic coloring with metal salts
US5587063A (en) * 1992-12-24 1996-12-24 Henkel Kommanditgesellschaft Auf Aktien Method for electrolytic coloring of aluminum surfaces using alternating current
EP1252374A1 (en) * 1999-11-25 2002-10-30 Enthone-Omi Inc. Process for the extended use of electrolytes
EP1252374A4 (en) * 1999-11-25 2003-03-12 Enthone Omi Inc Process for the extended use of electrolytes
US6797141B1 (en) 1999-11-25 2004-09-28 Enthone Inc. Removal of coagulates from a non-glare electroplating bath

Also Published As

Publication number Publication date
FR2384037B1 (en) 1980-04-18

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Legal Events

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