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.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
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
