贾利,杨素媛

• 1:北京理工大学材料学院
• 2:北京理工大学冲击环境材料技术国家级重点实验室

摘要(Abstract)：

为了改善镁合金耐蚀性,采用冷喷涂技术在镁合金AZ31上制备出纳米晶铝涂层,分析了涂层的微观组织,通过电化学试验及中性盐雾试验研究了涂层及基体的腐蚀性能。试验结果表明,涂层的纳米晶结构成功保留,涂层组织致密、厚度均匀,涂层硬度到达111.44 HV0.025,明显高于镁合金基体的硬度(66.8 HV0.025);涂层的自腐蚀电位(-0.78 V)高于镁合金基体的自腐蚀电位(-1.79 V),涂层的自腐蚀电流密度(5.3×10-7A/cm2)比镁合金基体的自腐蚀电流密度(2.45×10-5A/cm2)低2个数量级,盐雾试验表明涂层的耐腐蚀性能明显优于镁合金基体。

关键词(KeyWords)： 镁合金;冷喷涂;纳米晶铝涂层;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 北京理工大学冲击环境材料技术重点实验室自主基金(20130323)

作者(Author): 贾利,杨素媛

DOI: 10.13289/j.issn.1009-6264.2014.10.036

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