ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Micro arc oxidation is an effective method to improve corrosion resistance of magnesiumalloys and the selected electric parameters have great effects on coating properties. In this paper, theeffects of the unipolar pulse and the bipolar pulse on surface morphology, chemical compositions andcorrosion resistance were studied. When working voltage was higher than breakdown voltage, sparksappeared on sample surface whether the unipolar pulse or the bipolar pulse was used. However, underthe same positive working voltage, the spark size and lifetime obtained by the bipolar pulse wereevidently larger and longer than those by the unipolar pulse, which resulted in rougher anodic coatingsand worse corrosion resistance by the former than the latter
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.585.pdf
