The electrochemical corrosion of pure magnesium in 1 N NaCl

被引：585
作者：
Song, G [1 ]
Atrens, A [1 ]
Stjohn, D [1 ]
Nairn, J [1 ]
Li, Y [1 ]
机构：
[1] ACAD SINICA,STATE KEY LAB CORROS & PROTECT,INST CORROS & PROTECT MET,SHENYANG 110015,PEOPLES R CHINA
来源：
CORROSION SCIENCE | 1997年 / 39卷 / 05期
关键词：
magnesium; electrochemical corrosion; cathodic protection; STM;
D O I：
10.1016/S0010-938X(96)00172-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An electrochemical investigation was carried out to study the corrosion of pure magnesium in 1 N NaCl at different pH values involving electrochemical polarisation, scanning tunnel microscopy (STM), measurement of hydrogen gas evolution and measurement of the elements dissolved from the magnesium specimen which were determined by inductively coupled plasma atomic emission spectrophotometry (ICPAES). A partially protective surface film was a principal factor controlling corrosion. Film coverage decreased with increasing applied electrode potential. Application of a suitable external cathodic current density was shown to inhibit magnesium dissolution whilst at the same time the hydrogen evolution rate was relatively small. This showed that cathodic protection could be used to significantly reduce magnesium corrosion. A new definition is proposed for the negative difference effect (NDE). (C) 1997 Elsevier Science Ltd.
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页码：855 / 875
页数：21
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