孙鹏飞,张来启,林均品

• 1:北京科技大学新金属材料国家重点实验室

摘要(Abstract)：

以304不锈钢为基材,Ti-45Al-8Nb金属间化合物为电极,制备电火花沉积涂层,并研究其在锌液中的腐蚀行为。结果表明,涂层与基体呈冶金结合,是电极材料与基体材料剧烈重熔扩散的产物。相比304不锈钢,涂层样品的耐熔锌腐蚀性能显著提升,表现为孕育型腐蚀,孕育期为15天。涂层的腐蚀最初发生于样品的棱角处,属于典型的裂纹-瓦解机制。涂层碎片与锌液发生少量元素扩散,生成富Fe、Al的腐蚀产物。依据润湿的相关理论,讨论了涂层中原生裂纹对涂层耐熔锌腐蚀性能的影响。如果适当改善沉积工艺,减少涂层裂纹,有望延长涂层的使用寿命。

关键词(KeyWords)： 熔锌腐蚀;Ti-Al-Nb金属间化合物;电火花沉积;热镀锌

Abstract:

Keywords:

基金项目(Foundation): 国家“973”计划(2011CB605500);; 新金属材料国家重点实验室自主研究课题(2012Z06)

作者(Author): 孙鹏飞,张来启,林均品

DOI: 10.13289/j.issn.1009-6264.2014.02.028

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