Analysis of the corrosion performance of binder jet additive manufactured magnesium alloys for biomedical applications

Journal of Magnesium and Alloys

Mui Ling Sharon Nai¹  Daniel J. Blackwood²  Hang Li Seet²  Wee Kit Ong³  Sudesh Wijesinghe⁴  Mojtaba Salehi⁵  Kai Xiang Kuah⁵ 

[1] Corresponding author at: National University of Singapore, Singapore.;Engineering, National University of Singapore, 9 Engineering Drive 1, 117575 Singapore;Reliability and Characterisation Unit, Singapore Institute of Manufacturing Technology (SIMTech), Agency for, Science, Technology and Research (A*STAR), 73 Nanyang Drive, 637662 Singapore;Additive Manufacturing Group, Singapore Institute of Manufacturing Technology (SIMTech), Agency for, Science, Technology and Research (A*STAR), 73 Nanyang Drive, 637662 Singapore;;Department of Materials Science &

关键词: Magnesium;    Additive manufacturing;    Binder jetting;    Porous;    Corrosion;    Biodegradability;   

DOI  :  

来源: DOAJ

【 摘 要 】

Binder jet printing (BJP) is a state-of-the-art additive manufacturing technique for producing porous magnesium structures. Porous Mg-Zn-Zr based BJP samples were assessed for corrosion performance in simulated body fluids by electrochemical and hydrogen evolution measurements. The corrosion rates of the BJP specimens were significantly higher than solid controls, even after accounting for their larger surface areas, suggesting that the BJP microstructure is detrimental to corrosion performance. X-ray computed tomography revealed nonuniform corrosion within the porous structure, with corrosion products forming on the pore walls. Impregnating the pores with hydroxyapatite or polymers greatly improved the corrosion resistance of the BJP samples.

【 授权许可】

Unknown