浆体含砂量和砂粒径对环氧粉末涂层冲蚀规律的影响  

INFLUENCE OF CONTENT AND SIZE OF SAND IN SLURRIES ON EROSION BEHAVIOR OF EPOXY POWDER COATING

作　　者：骆素珍[1] 郑玉贵[1] 李劲[1] 张立新[1] 姚治铭[1] 柯伟[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《腐蚀科学与防护技术》2002年第2期63-66,共4页Corrosion Science and Protection Technology

基　　金：国家自然科学基金重点项目 (5 983 10 3 0 );国家重点基础研究专项经费 (G19990 65 0 )资助

摘　　要：利用旋转圆盘式冲刷腐蚀实验机 ,研究了环氧粉末涂层的冲蚀率与流速之间的变化规律以及含砂量、砂粒径对速度指数的影响 .结果表明 :在不同的含砂量和砂粒径条件下 ,冲蚀率与流速间均服从幂函数规律 ,即E =KVn.随含砂量增大 ,速度指数减小 ,最后趋于一稳定值 ;随粒径的增大 ,速度指数先减小而后增大 ,存在一极小值 .涂层的冲蚀是塑性变形和微切削共同作用 。The relationship between erosion rate of fusion-bonded epoxy powder coating and the flow velocity,and the influence of the content and size of sand in water based slurries on the exponent of the flow velocity have been investigated by using modified rotating disk rig.The results showed that erosion rate of the coating increased according to a power law with the flow velocity ( V ) under different test conditions,namely E=KV n .With the increase of sand content the exponent of flow velocity decreased and then reached a constant value.With the increase of sand size,firstly,the exponent of flow velocity decreased and increased consequently,there exists a minimum exponent of flow velocity.The erosion mechanism of the coating included microcut and plastic deformation and the later was dominant.

关 键 词：环氧粉末涂层 含砂量 砂粒径 速度指数 冲刷腐蚀 

分 类 号：TG172.85[金属学及工艺—金属表面处理]