On the corrosion of binary magnesium-rare earth alloys

By Nick Birbilis, M. Easton, A. Sudholz, Su-Ming Zhu, M. Gibson. 2009

285 citations recorded by the source corpus.

Abstract The corrosion properties of high-pressure die cast (HPDC) magnesium-rare earth (RE) based alloys have been studied. Binary additions of La, Ce and Nd to commercially pure Mg were made up to a nominal 6 wt.%. It was found that the intermetallic phases formed in the eutectic were Mg 12 La, Mg 12 Ce and Mg 3 Nd, respectively. Results indicated that increasing RE alloying additions systematically increased corrosion rates. This was also described in the context of the electrochemical response of Mg–RE intermetallics – which were independently assessed by the electrochemical microcapillary technique. This study is a discrete effort towards revealing the electrochemical effect of carefully controlled binary alloying additions to magnesium in order to elucidate the microstructure–corrosion relationship more generally for HPDC Mg alloys. Such fundamental information is seen to not only be useful in understanding the corrosion of alloys which presently contain RE additions, but may be exploited in the design of magnesium alloys with more predictable corrosion behaviour. There is a special need to understand this relationship – particularly for magnesium that commonly displays poor corrosion resistance.

Subfields: Biomaterials, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/3d956438d71a9202b1a7913b5dcd0c5f7e44e7f2

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In Biomaterials

In Materials Chemistry

In Mechanical Engineering

Citations in the corpus

Assessing the corrosion of biodegradable magnesium implants: a critical review of current methodologies and their limitations. (2012, unknown): “[137]).”
Fundamentals and advances in magnesium alloy corrosion (2017, background): “Even in cases when one property of Mg-alloys can be enhanced, such as creep resistance with heavy rare earth element loadings, this further aggravates corrosion [14].”