About some corrosion mechanisms of AZ91D magnesium alloy

被引：203

作者：

Ballerini, G

Bardi, U

Bignucolo, R

Ceraolo, G

机构：

[1] Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, FI, Italy

[2] EBU Proc Engn, I-10156 Turin, Italy

来源：

CORROSION SCIENCE | 2005年 / 47卷 / 09期

关键词：

magnesium; weight loss; X-ray photoelectron spectra;

D O I：

10.1016/j.corsci.2004.09.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work is dedicated to a study of the corrosion resistance of AZ91D (91% Mg) alloy in wet environments. Three industrial alloys obtained by die-casting or sand casting were subjected to salt spray corrosion tests (ASTM-B117 standard) and immersion tests. Weight loss kinetic curves were measured. Surface analysis was performed by X-ray photoelectron diffraction (XPS). After corrosion the sand cast alloy presents a surface mainly enriched in hydroxides and carbonates while the die-cast alloy presents a surface enriched also in mixed Mg-Al oxides. The quantitative analysis of the rate Mg/Al shows an enrichment in aluminium for the die-cast alloys in comparison to the sand cast alloy. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2173 / 2184

页数：12

共 13 条

[1] Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].