ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
The microstructures across the whole thickness of uncorroded and corroded rapidly solidifed Mg and Mg-9% Al ribbons have been characterized using TEM cross-sectional techniques. In this way, differences in susceptibility to and mechanisms of corrosion initiation between four clearly different magnesium alloy microstructures have been observed. These observations demonstrate that corrosion initiation occurs preferentially at grain or cell boundaries in both ‘pure’ magnesium and Mg-Al ribbons and that aluminium in solid solution clearly improves the corrosion resistance of magnesium alloys. Mg17Al12 precipitates at grain cell boundaries appear to promote corrosion initiation locally, but intragranular Mg17Al12 precipitates do not appear to promote corrosion to the same extent.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/sia.740190172
Permalink
