The results showed that the main causes are due to combination of stong caustic corrosion and low angle attack erosion,the corrosion is the more impotant factor in corrosion erosion process.

• 结果表明，叶轮失效原因是强碱腐蚀与低角度冲蚀磨损的综合作用，而腐蚀的作用更大。