Corrosion behavior of AZ91D magnesium alloy in sodium sulfate solution

被引：30

作者：

Chen, J. ^{[1
]}

Wang, J. ^{[1
]}

Han, E. ^{[1
]}

Dong, J. ^{[1
]}

Ke, W. ^{[1
]}

机构：

[1] Chinese Acad Sci, Environm Corros Ctr, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2006年 / 57卷 / 10期

关键词：

D O I：

10.1002/maco.200503959

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion behavior of as-cast AZ91D magnesium alloy in 0.1M sodium sulfate solution at the corrosion potential (E-corr) was investigated by using electrochemical impedance spectroscopy (EIS), environmental scanning electron microscopy (ESEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that the corrosion of AZ91D started at both the primary alpha-Mg and the eutectic alpha-Mg. The surface first was covered by a film (MgO, Mg(OH)2) which became thicker with time. Due to the dissolution of the eutectic alpha-Mg, the concentration of aluminum increased, MgAl2(SO4)(4). 2H(2)O precipitated at the primary alpha-Mg and progressively spread to the eutectic alpha-Mg areas. The surface film changed from two-layer to three-layer structure with the increase of immersion time.

引用

页码：789 / 793

页数：5

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