Application of Electrochemical Techniques to Characterization of the Corrosion Behaviors of GW63 Alloys
The corrosion behavior of GW63 (Mg-6wt.%Gd-3wt.%Y-0.4wt.%Zr) alloys in 5% NaCl aqueous solution has been investigated by PARSTAT 2273 instrument. The Open Circuit Potential (ECORR) vs. time curve, cyclic polarization (Pitting Scans) curve and Electrochemical Impedance Spectroscopy (EIS) was measured for the GW63 alloys in as-cast and T6 heat treatment conditions. The EIS results indicated that the tendency of impedance variation for as-cast condition was monotonic decreasing, however, the tendency of variation for T6 condition was not completely monotonic but the total tendency was decreasing. The values of impedance of GW63 alloy at 0.1 Hz are about 103 ohm-cm2 for as-cast and T6 condition.
Yafang Han et al.
X. W. Guo et al., "Application of Electrochemical Techniques to Characterization of the Corrosion Behaviors of GW63 Alloys", Materials Science Forum, Vols. 546-549, pp. 571-574, 2007