Electrochemical study on corrosion behaviour of zircaloy-2 in aqueous medium containing permanganate ion

摘要: The corrosion compatibility of zircaloy-2 was studied in strong oxidising permanganate based acidic (HMnO4) medium using impedance spectroscopy and potentiodynamic anodic polarisation methods at room temperature (28°C) elevated temperatures (65 90°C). average rate HMnO4 (0·417–8·33 mM) found to be 1·32×10−4 μm h−1 28°C, 2·59×10−4 65°C 3·53×10−4 90°C. At the resistance Rp values obtained from spectrum were higher (in kΩ) when compared 65 90°C, indicating a lower temperature. Comparative studies with 2·5 mM H2SO4 platinum (as working electrode) showed effects nature participation additional redox reactions medium. Cyclic absence pitting attack on zircaloy-2.