镁合金表面等离子喷涂Al涂层的耐腐蚀性能  

Study on the corrosion resistance of plasma spraying Al coated on the surface of magnesium alloy

作　　者：李于朋[1] 刘鑫 宫文彪[1] 马凯[3] 孙大千[3] 

机构地区：[1]长春工业大学先进结构材料教育部重点实验室,吉林长春130012 [2]长春北星轨道车辆配件有限公司,吉林长春130114 [3]吉林大学材料科学与工程学院,吉林长春130022

出　　处：《长春工业大学学报》2010年第5期511-517,共7页Journal of Changchun University of Technology

基　　金：吉林省科技发展计划基金资助项目(20070309)

摘　　要：采用等离子喷涂技术在AZ31镁合金表面制备Al涂层,测试了镁合金及Al涂层试样的极化曲线,研究了没有涂层的镁合金、经封孔处理和未经封孔处理的Al涂层镁合金3种试样在浸泡腐蚀和5%NaCl盐雾腐蚀情况下的耐腐蚀性能及其腐蚀行为。结果表明,经封孔处理的Al涂层试样在上述腐蚀条件下的耐腐蚀性均优于镁合金和未封孔处理的试样,在浸泡实验中未封孔处理的涂层试样比镁合金腐蚀更加严重,在盐雾实验中却优于镁合金。Al coating is prepared on the AZ31 Mg alloy surface by plasma spraying.The polarization curves of Mg alloy and Al coatings on magnesium surface are tested.Under the conditions of immersing and 5%NaCl salt spray corrosion,we study the corrosion resistance and corrosion behavior of the three kinds of samples： uncoated Mg alloy,the sealed Al coating Mg alloy and unsealed Al coating Mg alloy.The results show that the corrosion resistance of the sealed Al coating Mg alloy is better than that of other two alloys under the corrosion condition.The corrosion resistance of the unsealed coating alloy is worse than that of the uncoated alloy under immersion test but is better than that of the uncoated under the salt spray corrosion condition.

关 键 词：镁合金 AL涂层 等离子喷涂 耐腐蚀性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]