Structure and composition of anodic films formed on binary Mg-Al alloys inKOH-aluminate solutions under continuous sparking

Authors
Khaselev, O Weiss, D Yahalom, J
Citation
O. Khaselev et al., Structure and composition of anodic films formed on binary Mg-Al alloys inKOH-aluminate solutions under continuous sparking, CORROS SCI, 43(7), 2001, pp. 1295-1307
Citations number
17
Categorie Soggetti
Material Science & Engineering
Journal title
CORROSION SCIENCE
ISSN journal
0010938X → ACNP
Volume
43
Issue
7
Year of publication
2001
Pages
1295 - 1307
Database
ISI
SICI code
0010-938X(200107)43:7<1295:SACOAF>2.0.ZU;2-N
Abstract
Anodizing of binary Mg-Al alloys (2-12% at Al) and intermetallic Mg17Al12 w as studied in a solution containing 3 M KOH 0.6 M KF + 0.21 M Na3PO4, with and without addition of 0.4 M and 1.1 M aluminate. The anodic films were fo rmed under continuous breakdown and anodizing was accompanied by intensive sparking and oxygen evolution. The films formed on Mg-Al alloys in a bath c ontaining 1.1 M aluminate were composed of MgAl2O4 spinel and that on inter metallic Mg17Al2 Of gamma -Al2O3 and MgAl2O4. (C) 2001 Elsevier Science Ltd . All rights reserved.