GB1469294A - Producing coloured films on aluminium by anodising - Google Patents

Producing coloured films on aluminium by anodising

Info

Publication number
GB1469294A
GB1469294A GB1405174A GB1405174A GB1469294A GB 1469294 A GB1469294 A GB 1469294A GB 1405174 A GB1405174 A GB 1405174A GB 1405174 A GB1405174 A GB 1405174A GB 1469294 A GB1469294 A GB 1469294A
Authority
GB
United Kingdom
Prior art keywords
aluminium
electrolysis
sec
anodising
lattice defects
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
GB1405174A
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.)
Riken Light Metal Industry Co Ltd
Original Assignee
Riken Light Metal Industry Co Ltd
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
Priority claimed from JP3739773A external-priority patent/JPS541250B2/ja
Priority claimed from JP3739873A external-priority patent/JPS541251B2/ja
Priority claimed from JP5410773A external-priority patent/JPS5331094B2/ja
Application filed by Riken Light Metal Industry Co Ltd filed Critical Riken Light Metal Industry Co Ltd
Publication of GB1469294A publication Critical patent/GB1469294A/en
Expired 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
    • C25D11/14—Producing integrally coloured layers
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

1469294 Colour-anodizing aluminium RIKEN LIGHT METAL INDUSTRIES CO Ltd 29 March 1974 [3 April 1973 (2) 17 May 1973] 14051/74 Heading C7B An integrally coloured film is produced on Al or its alloys by electrolysis in aqueous H 2 SO 4 substantially free of other electrolytes using a pulsed voltage as shown in Fig. 1 wherein E 1 is positive (e.g. up to 40V), E 2 is 5-120V, T is 0À2 to 120 sec, # = 0À1-60 sec and the mean current density is 0À5-20A/dm<SP>2</SP>. A negative base voltage with negative pulses may in addition be applied for part of the electrolysis, with numerical values as specified above. The Al may contain e.g. Fe or Si, which dissolve in the H 2 SO 4 and subsequently enter lattice defects in the coating to cause colouration, which is also stated to be due to reduction of SO 4 in lattice defects to sulphur and/or sulphide. Treatment for 30-60 min at 0-30‹C is specified.
GB1405174A 1973-04-03 1974-03-29 Producing coloured films on aluminium by anodising Expired GB1469294A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP3739773A JPS541250B2 (en) 1973-04-03 1973-04-03
JP3739873A JPS541251B2 (en) 1973-04-03 1973-04-03
JP5410773A JPS5331094B2 (en) 1973-05-17 1973-05-17

Publications (1)

Publication Number Publication Date
GB1469294A true GB1469294A (en) 1977-04-06

Family

ID=27289454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1405174A Expired GB1469294A (en) 1973-04-03 1974-03-29 Producing coloured films on aluminium by anodising

Country Status (5)

Country Link
CA (1) CA1038327A (en)
CH (1) CH603828A5 (en)
DE (1) DE2416012A1 (en)
FR (1) FR2224553B1 (en)
GB (1) GB1469294A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187760A (en) * 1986-02-21 1987-09-16 Kinki Yakuhin Kogyo Kk Electrolytic colouring of chromium alloy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187760A (en) * 1986-02-21 1987-09-16 Kinki Yakuhin Kogyo Kk Electrolytic colouring of chromium alloy
GB2187760B (en) * 1986-02-21 1990-08-22 Kinki Yakuhin Kogyo Kk Electrolytic coloring method for chromium alloy

Also Published As

Publication number Publication date
FR2224553A1 (en) 1974-10-31
CA1038327A (en) 1978-09-12
AU6694874A (en) 1975-09-25
FR2224553B1 (en) 1977-10-14
CH603828A5 (en) 1978-08-31
DE2416012A1 (en) 1974-11-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee