期刊
CORROSION SCIENCE
卷 78, 期 -, 页码 353-368出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2013.10.020
关键词
Magnesium; Alloy; Aluminium; Passive Films; Pitting Corrosion
资金
- Center for Advanced Vehicular Systems (CAVS) at Mississippi State University
- Department of Energy
- National Energy Technology Laboratory [DEFC26-02OR22910]
- agency of the United States Government
The mechanisms associated with general, pitting, and filiform corrosion were quantified at various intervals for extruded AM30 magnesium alloy exposed to a cyclical salt spray and immersion environment. The three mechanisms were quantified using optical microscopy, laser profilometry, and SEM coupled with EDX for over 60 h of testing. General corrosion and pitting corrosion were more severe in the immersion environment, and filiform corrosion was more severe in the salt-spray environment. The presence of a sodium ion (Na+) diffusion region around the edge of the corrosion pits functioned as cathodic sites, accelerating the localised pitting corrosion rates in immersion environment. (C) 2013 Elsevier Ltd. All rights reserved.
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