巴志新,王章忠,董强胜,刘思雨,方信贤

• 1:南京工程学院材料工程学院

摘要(Abstract)：

采用超声辅助工艺在AZ91D镁合金表面制得了镁铝水滑石(Mg6Al2(OH)16CO3·4H2O)转化膜,通过扫描电镜(SEM)和X射线衍射(XRD)分析了膜层的表面形貌和成分,利用极化曲线和交流阻抗(EIS)来评价该转化膜对镁合金的防护作用,研究了超声波对膜层质量的影响规律。结果表明,超声辅助处理工艺能够有效地缩短成膜时间,但长时间处理会使膜层出现局部破裂。超声辅助酸碱浸泡2 h试样(US1+1 h)表面形成了较为连续、致密的水滑石膜,该膜层能明显提高镁基体的自腐蚀电位,并减小其腐蚀电流密度,腐蚀速度约为镁基体的1/20。

关键词(KeyWords)： 镁合金;镁铝水滑石;转化膜;耐蚀性;超声波

Abstract:

Keywords:

基金项目(Foundation): 江苏省高校自然科学研究项目(12KJB430007);; 南京工程学院创新基金项目(CKJB201203);; 国家级大学生创新创业训练计划项目(201311276001)

作者(Author): 巴志新,王章忠,董强胜,刘思雨,方信贤

DOI: 10.13289/j.issn.1009-6264.2014.07.009

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