Corrosion of an extruded magnesium alloy ZK60 component-The role of microstructural features

被引：157

作者：

Zeng, Rongchang ^{[1
]}

Kainer, Karl Ulrich ^{[2
]}

Blawert, Carsten ^{[2
]}

Dietzel, Wolfgang ^{[2
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266510, Peoples R China

[2] Zentrum Fuer Mat & Kuestenforsch GmbH, Helmholt Zentrum Geesthacht, D-21502 Geesthacht, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 13期

关键词：

Magnesium alloys; Microstructure; Corrosion; SEM; MECHANICAL-PROPERTIES; BEHAVIOR; AZ91; AZ31;

D O I：

10.1016/j.jallcom.2011.01.116

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure and corrosion behavior of an extruded magnesium alloy ZK60 bumper were investigated using optical microscopy, SEM and EDS as well as potentiodynamic polarization technique. The results show that the microstructure of the component is characterized by two distinct layers: the skin with coarse grains and the interior with fine grains. Preferential attack on the interior is attributed to the macrogalvanic corrosion between the two layers with an initial potential difference. The size and distribution of the intermetallic compounds play a crucial role in pitting corrosion and intergranular corrosion. (c) 2011 Elsevier B.V. All rights reserved.

引用

页码：4462 / 4469

页数：8

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