Electrochemical corrosion behavior of biodegradable Mg-Y-RE and Mg-Zn-Zr alloys in Ringer's solution and simulated body fluid

作者：Jamesh M I; Wu G; Zhao Y; McKenzie D R; Bilek M M M; Chu P K

来源：Corrosion Science, 2015, 91: 160-184.

DOI：10.1016/j.corsci.2014.11.015

• A. Magnesium
• B. EIS
• B. IR spectroscopy
• B. XPS

The corrosion behavior of WE43 and ZK60 Mg alloys are investigated in Ringer's solution and simulated body fluid (SBF). The major protective corrosion-products formed on both Mg alloys are crystalline aragonite form of CaCO3 and Mg(OH)2 in Ringer's solution whereas Ca10(PO4)6(OH)2, Ca3(PO4)2{dot operator}3H2O and Mg(OH)2 in SBF. Electrochemical impedance spectroscopy reveals that in the initial stage, the increase in the corrosion resistance on both Mg alloys in Ringer's solution is more than 6 times than in SBF. Our study reveals higher RP, larger impedance, and bigger phase angle maxima for WE43 than ZK60 after immersion in both solutions for 96h.