Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 494, Issue 1-2, Pages 401-406Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.04.031
Keywords
Magnesium alloy; Plasma electrolytic oxidation; Electrochemical behaviour; Stress corrosion cracking; Fractography
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Funding
- Alexander von Humboldt Foundation, Germany
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The effect of a silicate-based plasma anodization treatment on the corrosion and stress corrosion cracking behaviour of a cast AM50 magnesium alloy was studied. Electrochemical tests revealed the beneficial effect of the plasma electrolytic oxidation (PEO) in improving the corrosion resistance of the alloy. Although the coating had provided an improved resistance to stress corrosion cracking in this test environment at a nominal strain rate of 10(-6) s(-1), it could not completely eliminate the SCC susceptibility of the alloy. Cracking of the coating under conditions of straining was found to be the reason for SCC of PEO-coated alloy. (C) 2008 Elsevier B.V. All Fights reserved.
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