晶粒度对Al-Zn-Sn-Ga阳极电化学性能的影响  

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

作　　者：贺俊光[1] 文九巴[1] 周旭东[1] 李君峰[1] 

机构地区：[1]河南科技大学材料科学与工程学院,洛阳471003

出　　处：《腐蚀科学与防护技术》2012年第6期484-488,共5页Corrosion Science and Protection Technology

基　　金：河南省科技创新杰出人才计划项目(094200510019);河南省自然科学基金(092300410132)资助

摘　　要：通过"变形+热处理"的方法改变Al-Zn-Sn-Ga合金的晶粒度,利用电流效率、极化曲线、电化学阻抗谱和微观分析手段,研究了晶粒度对其电化学性能的影响.结果显示,经"不同变形量+相同热处理"的合金试样,阳极电流效率随晶粒尺寸增加先升高后降低,晶粒尺寸约为38μm时电流效率最高;而经"相同变形量+不同热处理"的试样,晶粒尺寸越小,阳极的电流效率越高.晶粒大小对阳极表面溶解状态没有明显的影响.Effect of grain size on electrochemical performance was investigated for A1-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 （38 ~tm） 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 orAl sacrificial anode.

关 键 词：晶粒度 铝合金牺牲阳极 电化学性能 极化曲线 电化学阻抗谱 

分 类 号：TG174.41[金属学及工艺—金属表面处理]