GB1022423A - Anodizing aluminium and alloys thereof - Google Patents

Anodizing aluminium and alloys thereof

Info

Publication number
GB1022423A
GB1022423A GB4521/65A GB452165A GB1022423A GB 1022423 A GB1022423 A GB 1022423A GB 4521/65 A GB4521/65 A GB 4521/65A GB 452165 A GB452165 A GB 452165A GB 1022423 A GB1022423 A GB 1022423A
Authority
GB
United Kingdom
Prior art keywords
anodizing
acid
metal salt
aliphatic
treatment
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
GB4521/65A
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
Publication of GB1022423A publication Critical patent/GB1022423A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Aluminium and alloys thereof are given a hard coloured anodized coating using as electrolyte a mixture of (1) a mineral acid as conductor e.g. 0.05-4.5% H2SO4, (2) an aliphatic hydroxy acid or dicarboxylic acid, (3) a metal salt of the aliphatic acid with Cu, Fe, Ni, Co, or Mn. Aliphatic acids specified are glycollic, lactic, malic, oxalic, malonic, succinic, or maleic acid. The metal salt of these may be complexed with ammonia to improve solubility. The preferred metal salt is ferric oxalate or glycollate but oxalates of the other metals are specified. The full treatment consists of degreasing, pre-etching with NaOH and sodium gluconate, acid treatment, and then anodizing. The main anodizing stage may follow standard anodizing treatment using H2SO4. The main anodizing step is effected at 50-80 DEG F., and applying a gradually increasing voltage from 20V up to 250V. The anodizing bath may be regenerated by adding H2O2. The process may be applied to extrusions sheet or mesh aluminium.
GB4521/65A 1964-03-20 1965-02-02 Anodizing aluminium and alloys thereof Expired GB1022423A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US35359164A 1964-03-20 1964-03-20
US40335264A 1964-10-12 1964-10-12

Publications (1)

Publication Number Publication Date
GB1022423A true GB1022423A (en) 1966-03-16

Family

ID=42257254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4521/65A Expired GB1022423A (en) 1964-03-20 1965-02-02 Anodizing aluminium and alloys thereof

Country Status (6)

Country Link
US (1) US3616311A (en)
CH (1) CH453841A (en)
DE (1) DE1496970A1 (en)
ES (1) ES310747A1 (en)
FR (1) FR1424656A (en)
GB (1) GB1022423A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195697A1 (en) * 1972-08-07 1974-03-08 Innova Corp Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid
SE369204B (en) * 1971-03-15 1974-08-12 Sperimentale Metalli Leggeri S
JPS5315014B2 (en) * 1972-05-18 1978-05-22
US5066368A (en) * 1990-08-17 1991-11-19 Olin Corporation Process for producing black integrally colored anodized aluminum components
US5288372A (en) * 1992-07-07 1994-02-22 Alumax Inc. Altering a metal body surface
ITRA20080006A1 (en) * 2008-02-01 2009-08-02 Erreti Srl CONTINUOUS FACADE
US10214827B2 (en) 2010-05-19 2019-02-26 Sanford Process Corporation Microcrystalline anodic coatings and related methods therefor
US8512872B2 (en) 2010-05-19 2013-08-20 Dupalectpa-CHN, LLC Sealed anodic coatings
US8609254B2 (en) 2010-05-19 2013-12-17 Sanford Process Corporation Microcrystalline anodic coatings and related methods therefor
DE102011005918A1 (en) * 2011-03-22 2012-09-27 Airbus Operations Gmbh Peelable anodizing agent, especially for local anodic oxidation of metal surfaces

Also Published As

Publication number Publication date
US3616311A (en) 1971-10-26
CH453841A (en) 1968-03-31
FR1424656A (en) 1966-01-14
DE1496970A1 (en) 1970-01-08
ES310747A1 (en) 1965-07-01

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