Effect of Grain Size on Electrochemical Performance of Al-Zn-Sn-Ga Alloy

Effect of grain size on electrochemical performance was investigated for Al-Zn-Sn-Ga alloy,which has been cold deformed and then heat treated.In the case that the alloy suffered from different degree of deformation,but then heat treatment at the same temperature,the current efficiency firstly increases and then decreases gradually with the increase of grain size.The sample with a moderate grain size(38μm) has the highest current efficiency.However,as for that the alloy suffered from the same degree of deformation,but then heat treatment at different temperatures,the current efficiency decreases with increasing the grain size.Grain size has no significant effect on the corrosion morphology of Al sacrificial anode.