郭文敏,吴玉萍,李改叶,洪晟,何智华

• 1:河海大学力学与材料学院

摘要(Abstract)：

采用高速电弧喷涂工艺在低碳钢基体表面制备了FeNiCr/Cr3C2和NiCrTi两种电弧喷涂涂层。通过光学显微镜对涂层的显微组织进行了观察研究。试验选用摩尔比为7:3的Na2SO4+K2SO4饱和水溶液涂刷在涂层表面,在700℃的条件下进行了156 h的热腐蚀试验。通过腐蚀动力学测试对电弧喷涂涂层的抗热腐蚀性能进行了评估。采用了X射线衍射,扫描电镜和能谱分析技术对热腐蚀机理进行了探讨。结果表明,两种电弧喷涂涂层具有致密的层状结构,涂层中含有少量空隙。在涂层表面生成的连续致密的氧化膜使得NiCrTi涂层具有良好的抗热腐蚀性能。FeNiCr/Cr3C2涂层则遭受了较严重的氧化腐蚀和硫化腐蚀,并且有内硫化物析出,抗热腐蚀性能较差。

关键词(KeyWords)： 电弧喷涂;涂层;热腐蚀

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郭文敏,吴玉萍,李改叶,洪晟,何智华

DOI: 10.13289/j.issn.1009-6264.2011.11.025

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