Structure and composition of anodic films formed on binary Mg–Al alloys in KOH–aluminate solutions under continuous sparking

Anodizing of binary Mg–Al alloys (2–12% at Al) and intermetallic Mg 17Al 12 was studied in a solution containing 3 M KOH+0.6 M KF+0.21 M Na 3PO 4, with and without addition of 0.4 M and 1.1 M aluminate. The anodic films were formed under continuous breakdown and anodizing was accompanied by intensiv...

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Bibliographic Details
Published inCorrosion science Vol. 43; no. 7; pp. 1295 - 1307
Main Authors Khaselev, Oscar, Weiss, Danny, Yahalom, Joseph
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.07.2001
Elsevier Science
Subjects
Anodizing
Applied sciences
Exact sciences and technology
Metals. Metallurgy
MgAl 2O 4
Mg–Al alloys
Other surface treatments
Production techniques
Sparking
Surface treatment
Anodizing
MgAl 2O 4
Mg–Al alloys
Sparking
Magnesium base alloys
Potassium hydroxide
Corrosion test
Aluminium alloy
Anodic oxide
Experimental study
Microstructure
Anodization
Surface treatment
Thin film
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Summary:Anodizing of binary Mg–Al alloys (2–12% at Al) and intermetallic Mg 17Al 12 was studied in a solution containing 3 M KOH+0.6 M KF+0.21 M Na 3PO 4, with and without addition of 0.4 M and 1.1 M aluminate. The anodic films were formed under continuous breakdown and anodizing was accompanied by intensive sparking and oxygen evolution. The films formed on Mg–Al alloys in a bath containing 1.1 M aluminate were composed of MgAl 2O 4 spinel and that on intermetallic Mg 17Al 2 of γ-Al 2O 3 and MgAl 2O 4.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0010-938X
1879-0496
DOI:10.1016/S0010-938X(00)00116-5