Affiliation:
1. GKSS-Forschungszentrum Geesthacht GmbH
2. GKSS Research Centre
3. Leibniz-Institut für Oberflächenmodifizierung
4. Universität Leipzig
Abstract
The range of applications for magnesium alloys is still limited due to their relatively poor
corrosion behavior. In recent years, various new magnesium alloys were developed, some of them
with improved corrosion properties, thus opening new fields of application. However, the number of
alloying elements for the use in conventional cast processes is limited due to their interaction with
liquid magnesium, other alloying elements or large differences in the melting temperatures. The
possibilities for grain refinement by post-processing are also restricted. PVD techniques can help to
produce supersaturated precipitation free and microcrystalline magnesium layers.
Using ion beam and magnetron sputtering, binary or ternary Mg-Al, Mg-Ti and Mg-Sn alloy
systems as well as standard alloys (AM50, AZ91 and AE42) were deposited on silicon and on
magnesium substrates. The effect of the microstructure on the corrosion properties was studied by
comparing as cast material and PVD coatings using potentiodynamic polarization, linear polarization
resistance, and electrochemical impedance techniques.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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