Microstructure-corrosion behaviour relationship of micro-alloyed Mg-0.5Zn alloy with the addition of Ca, Sr, Ag, In and Cu

Materials & Design

Carsten Blawert¹  Frank Feyerabend²  Yiming Jin²  Jan Bohlen²  Julia Bode³  Carla Vogt³  Regine Willumeit-Römer³  Björn Wiese⁴  Min Deng⁴  Maria Silva Campos⁴  Nico Scharnagl⁴  Katharina Strecker⁴  Di Mei⁴  Hong Yang⁴ 

[1] Corresponding author.;Division of Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany;Institute of Analytical Chemistry, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany;Magnesium Innovation Centre, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany;

关键词: Mg alloys;    Micro-alloying;    Microstructure;    Corrosion;   

DOI  :  

来源: DOAJ

【 摘 要 】

The effects of micro-addition (0.2 wt.%) of Ca, Sr, Ag, In and Cu on the microstructure and corrosion properties of the as-cast Mg-0.5Zn alloy were systematically studied. It is found that the grain refinement efficiency and intermetallics forming ability differed greatly among these elements. Si impurity also played a vital role in the precipitates formation in all systems. It is generally observed that Mg-Zn-Ca possessed the highest corrosion resistance due to the refined grain size, limited intermetallics and uniform corrosion, whereas Mg-Zn-Cu showed the highest corrosion rate due to the coarse grains, intermetallics activity and severe pitting corrosion. With the exception of Mg-Zn-Cu, the corrosion performances of Mg-0.5Zn(-0.2X) alloys were comparable with the higher concentrated systems from literature, indicating the feasibility of these micro-alloying systems for biomedical applications.

【 授权许可】

Unknown