Effect of Rheocasting on Corrosion of AM50 Mg Alloy
Journal article, 2015

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°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.

Author

Mohsen Esmaily

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Nooshin Mortazavi Seyedeh

Chalmers, Applied Physics, Materials Microstructure

Mehrdad Shahabi Navid

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Mats Halvarsson

Chalmers, Applied Physics, Materials Microstructure

Lars Nyborg

Chalmers, Materials and Manufacturing Technology

M. Wessen

School of engineering Jönköping university

A. E. W. Jarfors

School of engineering Jönköping university

Lars-Gunnar Johansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Journal of the Electrochemical Society

0013-4651 (ISSN)

Vol. 162 3 C85-C95

Subject Categories

Manufacturing, Surface and Joining Technology

Materials Chemistry

Metallurgy and Metallic Materials

Areas of Advance

Energy

Materials Science

DOI

10.1149/2.0331503jes

More information

Latest update

5/14/2018