| Abstract: | The effect of homogenization treatment on the corrosion behavior and corrosion mechanism of Mg-Y alloys in 3.5 wt% NaCl solution was investigated by electrochemical characterization,immersion testing and SEM observations.The diffusion kinetics model of Mg-Y alloy was established,and the homogenization system was determined.With increasing of homogenization temperature and time,the Mg_(24)Y_5 phase gradually decreased,which increased the self-corrosion potential and the high-frequency arc radius.The corrosion resistance of the five alloys could be given as follow:Mg-0.25Y Mg-8Y Mg-15Y Mg-5Y Mg-2.5Y.The Mg-(0.25,2.5 and 5) Y show localized corrosion in a wide range and small depth,while Mg-(8 and 15) Y showed localized corrosion in a smaller range and larger depth. |
