The objective of this work was to investigate the electrochemical behavior of Mg40Ca and Mg-Ca-Gd alloys for biomedical
application as implantable absorbable devices. Electrochemical tests were performed under a physiological electrolyte of 0.9%
NaCl, pH=7.4, 37°C, at a rate of 1, 0.1 and 0.01 V/s. Polarization curves showed similar mechanism of electrochemical behavior
between alloys. The ternary Mg-Ca-Gd alloy showed lower values of current density and corrosion potential than Mg40Ca alloy.
The Mg40Ca based binary alloy showed higher values of corrosion susceptibility and lower polarization resistance than Mg-Ca-Gd
alloy. Corrosion resistance improvements were achieved in ternary Mg based alloy with Gd and Ca content. The alloy with Gd and Ca
content seemed adequate electrochemical resistance to attend biomedical demand.