On the microstructure and corrosion behavior of AZ91/SiC composites produced by rheocasting
2016 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 180, 29-37 p.Article in journal (Refereed) Published
The corrosion behavior of magnesium-aluminum (Mg-Al) alloy AM50 produced by a rheocasting (RC) technique was examined in the presence and absence of CO2 at three temperatures -4, 4 and 22 degrees C. The slurry preparation in the RC material was performed with the newly developed RheoMetal process. For reference, 99.97% Mg was included in the corrosion exposures. The influence of the microstructure on the atmospheric corrosion of alloy AM50 produced by RC and high pressure die casting (HPDC) was investigated. The RC AM50 alloy showed better corrosion resistance than HPDC AM50 in all the exposure environments studied. For both materials, there was a strong positive correlation between temperature and the atmospheric corrosion rate. The superior atmospheric corrosion behavior of RC AM50 compared to HPDC AM50 is carefully discussed in relation to differences in the as-cast microstructure. This study demonstrates that producing the alloy AM50 by this type of RC technique opens the door to Mg-Al alloys as a promising candidate for various applications where corrosion resistance is of importance.
Place, publisher, year, edition, pages
2016. Vol. 180, 29-37 p.
Magnesium alloy, Composite materials, Microstructure, Corrosion
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:hj:diva-34781DOI: 10.1016/j.matchemphys.2016.05.016ISI: 000380077600005ScopusID: 2-s2.0-84969922473Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-34781DiVA: diva2:1066460