Effect of Stress on the Electrochemical Corrosion Behavior of Mg-Zn-In-Sn Alloy

Effects of stress on the electrochemical corrosion behaviours of Mg-Zn-In-Sn alloy anode were evaluated. Open circuit potential (OCP), loop current (LC) measurements, scanning electron microscopy (SEM) and electron probe micro-analysis (EPMA) analyses were used to investigate electrochemical properties, corrosion surface and cross section characteristics of alloy anodes. The results show that OCPs of Mg-Zn-In-Sn alloy anode are negatively removed and the LCs increase by stresses. Corrosion product films of alloy anodes are easy to shed off and the thicknesses of films decrease with increasing of stresses. LC calculation results are in almost agreement with those obtained by measurements. By adjusting the Tafel factors, the calculated results of LC were mainly consistent with the experimental results. The infuence of stresses on the LCs was revealed on the theoretial.