Effect of Pickling on Surface Roughness of Matrix

In this paper, the pretreatment pickling process of NdFeB substrate surface with good roughness was studied by adding roughening agent into the pretreatment pickling solution. The test results show that suitable concentration of pickling roughening agent is the key to obtain good roughness of NdFeB matrix. The matrix surface with good roughness can be obtained by using organic crystal powder as roughening agent. The effects of pickling concentration, pickling temperature and pick-ling time on surface roughness of NdFeB substrate were also studied.