Formation, structure and composition of anodic films on AM60 magnesium alloy obtained by DC plasma anodising

被引：151

作者：

Verdier, S ^{[1
]}

Boinet, M ^{[1
]}

Maximovitch, S ^{[1
]}

Dalard, F ^{[1
]}

机构：

[1] Ecole Natl Super Electrochim & Electrome Grenoble, CNRS, Lab Electrochim & Physicochim Mat & Interfaces, UMR 5631,INPG, F-38402 St Martin Dheres, France

来源：

CORROSION SCIENCE | 2005年 / 47卷 / 06期

关键词：

magnesium; anodic filins; plasma electrolytic oxidation; microarc;

D O I：

10.1016/j.corsci.2004.07.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anodising of AM60 magnesium alloy (6% Al + 0.27% Mn) was studied in a solution containing 1.5 M KOH + 0.5 M KF + 0.25 M Na(2)HPO(4)(.)12H(2)O with addition of various NaAlO2 concentrations. The experiments were carried Out in DC current galvanostatic mode. Observations of phenomena occurring at the sample surface plus voltage monitoring revealed three stages: traditional anodising, followed by microarc anodising and finally arcing. The film was porous and cracked, with poor bonding to the substrate. It was composed of magnesium and aluminium oxide, and contained all the elements present in the electrolyte. The aluminium concentration in the film was dependent on the concentration of aluminate ions in the electrolyte. The transition from microarc to arcing stage took place when the alloy surface was completely covered by the anodic film. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1429 / 1444

页数：16

共 28 条

[1] Enrichment of alloying elements in anodized magnesium alloys [J].