Recent Progress on Corrosion Behavior and Mechanism of Mg–RE Based Alloys with Long Period Stacking Ordered Structure

Abstract

Mg alloys containing long period stacking ordered (LPSO) structures possess excellent mechanical properties and corrosion resistance, exhibiting great application potential in biodegradable implants. The corrosion process of different LPSO phases in the Mg alloys need to be furtherly clarified in different solution environments. In this paper, we mainly reviewed the influencing factors on the corrosion behavior of LPSO-containing Mg alloys, including the alloying elements, processing technologies, and the types, volume fractions and distributions of LPSO phases. Recent researches are well summarized with an emphasis on their corrosion mechanism. Special attention is given to the key issues for LPSO-containing Mg alloys as biomedical implants, with their biodegradation behavior comprehensively discussed. The motivation is to provide theoretical support for the possible application of LPSO-containing Mg alloys in the biomedical field.