均匀化处理对Al-5.6Mg2Si合金耐静态腐蚀性能的影响  

Influence of Homogenization Treatment on the Static Corrosion Resistance of Al-5.6Mg_(2)Si Alloy

作　　者：赵宇擎 赵作福[1] 袁辉 李鑫 齐锦刚[1] ZHAO Yu-qing;ZHAO Zuo-fu;YUAN Hui;LI Xin;QI Jin-gang(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China;College of Chemistry and Chemical Engineering,Inner Mongolia University,Huhehot 010000,China)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001 [2]内蒙古大学化学化工学院,内蒙古呼和浩特010000

出　　处：《辽宁工业大学学报（自然科学版）》2023年第2期71-75,共5页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(51601086);辽宁省自然科学基金计划面上项目(2022-MS-381);国家级大学生创新创业训练计划项目(202210154004)。

摘　　要：采用X射线衍射、扫描电镜等测试手段研究了均匀化处理对Al-5.6Mg_(2)Si合金耐静态腐蚀性能的影响。结果表明:均匀化处理提高了Al-5.6Mg_(2)Si合金凝固组织的均匀化程度,降低了易于发生原电池现象的点敏感度,使该合金在3.5%NaCl溶液中的耐腐蚀性能提高。对比未经均匀化处理的Al-5.6Mg_(2)Si合金,其平均晶粒尺寸由42.5μm变成16.4μm,约为未均匀化处理的38.6%;Mg_(2)Si相体积份数由61.72%降低到57.20%,为未均匀化处理的92.7%,其平均腐蚀速率由0.38180g/m^(2)·h减小到0.00807g/m^(2)·h,约为未均匀化处理时的2.11%。In this paper,the influence of homogenization treatment on the static corrosion resistance of Al-5.6Mg_(2)Si alloy was investigated by using X-ray diffraction and scanning electron microscope.The results show that the uniformity of Al-5.6Mg_(2)Si alloy can be improved,and the point sensitivity of predisposing to the phenomenon of primary batteries can be reduced,and its corrosion resistance can be improved in 3.5%NaCl solution.Compared with no homogenization of Al-5.6Mg_(2)Si alloy,the average grain size decreased from 42.5μm to 16.4μm,is no homogenization of 38.6%,and the volume fraction of primary Mg_(2)Si phase decreased from 61.72%to 57.20%,is no homogenization of 92.7%,and the average corrosion rate decreased from 0.38180 g/m^(2)·h to 0.00807 g/m^(2)·h,is no homogenization of 2.11%.

关 键 词：Al-5.6Mg_(2)Si合金 静态腐蚀 均匀化处理 Mg_(2)Si 

分 类 号：TG166.3[金属学及工艺—热处理]