刘祥庆,郭志猛,高克玮,林涛,张瑞珠

• 1:北京科技大学材料科学与工程学院
• 2:华北水利水电学院机械工程学院

摘要(Abstract)：

利用两步法,感应熔覆制备了内、外壁Ni60合金涂层钢管。研究了熔覆涂层腐蚀前、后截面显微组织以及腐蚀产物膜的微观形貌特征,利用失重法测量了涂层盐雾、CO2腐蚀速率,定量评价了熔覆涂层的耐腐蚀性能。结果表明:熔覆Ni60涂层全致密,内部均匀分布大量碳化物、硼化物硬质点,涂层与基体之间冶金结合,界面处互扩散区宽度约为8μm。熔覆Ni60涂层对基体有较好的防腐保护作用,盐雾腐蚀环境下出现锈斑的时间大于150 h,平均腐蚀速率为0.75 g/(m2.h),涂层动态CO2腐蚀相对静态CO2腐蚀更加剧烈,实验温度348 K时,静态腐蚀速率为0.78 g/(m2.h),动态腐蚀速率为1.02 g/(m2.h)。

关键词(KeyWords)： 材料表面与界面;感应熔覆;Ni60涂层;盐雾腐蚀;CO2腐蚀

Abstract:

Keywords:

基金项目(Foundation): 水利部“948”重点项目(201048);; 广东省产学研重大专项(2009A09010008)

作者(Author): 刘祥庆,郭志猛,高克玮,林涛,张瑞珠

DOI: 10.13289/j.issn.1009-6264.2012.s1.021

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