EP0112439A3 - Process for the anodic oxidation of aluminium alloys - Google Patents

Process for the anodic oxidation of aluminium alloys Download PDF

Info

Publication number
EP0112439A3
EP0112439A3 EP83108951A EP83108951A EP0112439A3 EP 0112439 A3 EP0112439 A3 EP 0112439A3 EP 83108951 A EP83108951 A EP 83108951A EP 83108951 A EP83108951 A EP 83108951A EP 0112439 A3 EP0112439 A3 EP 0112439A3
Authority
EP
European Patent Office
Prior art keywords
workpieces
anodic oxidation
aluminium alloys
switched
voltage
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
EP83108951A
Other languages
German (de)
Other versions
EP0112439A2 (en
EP0112439B1 (en
Inventor
Reinhard Dr. Nissen
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.)
Electro Chemical Engineering GmbH
Original Assignee
Electro Chemical Engineering GmbH
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 Electro Chemical Engineering GmbH filed Critical Electro Chemical Engineering GmbH
Priority to AT83108951T priority Critical patent/ATE33858T1/en
Publication of EP0112439A2 publication Critical patent/EP0112439A2/en
Publication of EP0112439A3 publication Critical patent/EP0112439A3/en
Application granted granted Critical
Publication of EP0112439B1 publication Critical patent/EP0112439B1/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
    • 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
    • C25D11/024—Anodisation under pulsed or modulated current or potential

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

1. Process for anodic oxidation of workpieces made from an aluminium alloy, particularly with high copper and/or nobler metal content, the workpieces being arranged in a moving aqueous electrolyte together with one or more cathodes and a voltage being applied mainly periodically to produce current pulses of short duration with high current conduction to the workpieces and the cathode(s), characterized in that the voltage remains switched on each time as long as a noticeable build-up of the oxide layer results and then is switched off until the Joule effect produced is mainly eliminated.
EP83108951A 1982-11-30 1983-09-10 Process for the anodic oxidation of aluminium alloys Expired EP0112439B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108951T ATE33858T1 (en) 1982-11-30 1983-09-10 PROCESS FOR ANODIC OXIDATION OF ALUMINUM ALLOYS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823244217 DE3244217A1 (en) 1982-11-30 1982-11-30 METHOD FOR ANODICALLY OXYDATING ALUMINUM ALLOYS
DE3244217 1982-11-30

Publications (3)

Publication Number Publication Date
EP0112439A2 EP0112439A2 (en) 1984-07-04
EP0112439A3 true EP0112439A3 (en) 1986-11-05
EP0112439B1 EP0112439B1 (en) 1988-04-27

Family

ID=6179408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108951A Expired EP0112439B1 (en) 1982-11-30 1983-09-10 Process for the anodic oxidation of aluminium alloys

Country Status (3)

Country Link
EP (1) EP0112439B1 (en)
AT (1) ATE33858T1 (en)
DE (2) DE3244217A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442591A1 (en) * 1984-11-22 1986-05-22 Vereinigte Aluminium-Werke AG, 1000 Berlin und 5300 Bonn METHOD FOR HARDANODIZING ALUMINUM CASTING PARTS PRODUCED IN VACUUM CASTING
WO1993003207A1 (en) * 1991-07-30 1993-02-18 Minsky Radiotekhnichesky Institut Method for making metal sublayer based on aluminium or its alloys
DE4445007A1 (en) * 1994-12-16 1996-06-20 Fissler Gmbh Process for equipping a crockery item with a non-stick coating
DE19507472C2 (en) * 1995-03-03 1999-09-02 Electro Chem Eng Gmbh Gas or current nozzle of an inert gas welding system
US7702308B2 (en) * 2004-03-11 2010-04-20 Alcatel-Lucent Usa Inc. Method of associating data with a call to a call center
DE102008020513B4 (en) 2007-05-15 2022-06-23 Sew-Eurodrive Gmbh & Co Kg Brake, clutch or electric motor
DE102008019284B4 (en) 2008-04-16 2015-05-13 Sew-Eurodrive Gmbh & Co Kg Pad carrier, brake, clutch or electric motor
EP2166200A1 (en) 2008-09-23 2010-03-24 Franz Rübig & Söhne GmbH & Co. KG Valve spring disc and method for its manufacture
CN113981500B (en) * 2021-12-09 2023-03-28 陕西宝成航空仪表有限责任公司 Oxalic acid anodizing process method for hard aluminum alloy shell part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1150882A (en) * 1965-07-14 1969-05-07 Alcan Res & Dev Anodising Treatment For Aluminium And Its Alloys
US3473103A (en) * 1966-02-28 1969-10-14 Murdock Inc Aluminum anodizing apparatus
US4026781A (en) * 1969-08-07 1977-05-31 Scionics Of California Inc. Anodizing means and techniques
US4152221A (en) * 1977-09-12 1979-05-01 Nancy Lee Kaye Anodizing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920018A (en) * 1957-04-22 1960-01-05 Electro Chem Mfg Co Inc Anodizing process and system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1150882A (en) * 1965-07-14 1969-05-07 Alcan Res & Dev Anodising Treatment For Aluminium And Its Alloys
US3473103A (en) * 1966-02-28 1969-10-14 Murdock Inc Aluminum anodizing apparatus
US4026781A (en) * 1969-08-07 1977-05-31 Scionics Of California Inc. Anodizing means and techniques
US4152221A (en) * 1977-09-12 1979-05-01 Nancy Lee Kaye Anodizing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PLATING AND SURFACE FINISHING, Band 69, Nr. 7, Juli 1982, Seiten 62-65, Winterpark, Florida, US; K. YOKOYAMA et al.: "Advantages of pulse anodizing" *

Also Published As

Publication number Publication date
DE3376430D1 (en) 1988-06-01
DE3244217A1 (en) 1984-05-30
ATE33858T1 (en) 1988-05-15
EP0112439A2 (en) 1984-07-04
EP0112439B1 (en) 1988-04-27

Similar Documents

Publication Publication Date Title
ES8703211A1 (en) Decontamination using electrolysis.
DE3376430D1 (en) Process for the anodic oxidation of aluminium alloys
GB2203451B (en) Method and apparatus for making the inner crowns of composite-layered crowns for restoring crowns
ES8207593A1 (en) Electrode for igneous electrolysis.
ES8204481A1 (en) Method for selective removal of copper contaminants from activator solutions containing palladium and tin
AU591080B2 (en) Electrolytic process for the preparation of rare earths or alloys thereof and apparatus for carrying out the process
GR3001389T3 (en) Process and apparatus for sustaining the cathodic protection of metal surfaces
GB1223372A (en) Method of forming a layer of metal having fine particles included therein by electroplating and electrophoresis
SU1007888A1 (en) Method of electrochemical machining
ES8603594A1 (en) Method and plants for the continuous unilateral anodic oxidation of aluminium bands and utilization thereof to make offset printing plates.
SU539851A1 (en) Electrochemical glass processing method
JPS57139467A (en) Multielectrode tig welding method of aluminum alloy
JPS6477850A (en) Image display device
JPS53131932A (en) Anode oxidation method of aluminium by current inversion electrolysis and its alloy
EP0320952A3 (en) Process for the electrolytic colouring of anodically obtained oxide layers on aluminium or aluminium alloys
JPS5437039A (en) Production of elongated materials such as plate, strip or wire
JPS5524947A (en) Formation of nontransparent anodic oxide film in aluminium-clad material
Istomin Behaviour of Oxygen During Electroslag Smelting With an Asymmetric Current
Behmer et al. Investigation of Electrolytic Refining of Tin With Use of Periodic Current Reversal
Hard Method for Producing Magnesium Metal From Molten Salt
GB1245820A (en) Method of forming electrically insulating film on aluminium or aluminium base alloys by anodic oxidation
GB1518979A (en) Process for continuous electrolytic colouring of almuminium or aluminum base alloy strip and wire
Enning Reduction of Wear by Use of Step Current Impulses During Electrospark Machining
Kostrova et al. Determination of the Optimum Conditions of Electrolytic Deposition of a Decorative Brass Coating From Pyrophosphate Electrolyte
JPS539208A (en) Electrolyzing method for metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19861115

17Q First examination report despatched

Effective date: 19870917

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19880427

REF Corresponds to:

Ref document number: 33858

Country of ref document: AT

Date of ref document: 19880515

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19880430

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3376430

Country of ref document: DE

Date of ref document: 19880601

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020528

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020816

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020827

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20020828

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020904

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020909

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20020913

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030909

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030909

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030910

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030910

BE20 Be: patent expired

Owner name: *ELECTRO CHEMICAL ENGINEERING G.M.B.H.

Effective date: 20030910

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL