Affiliation of Author(s):机电学院
Journal:INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
Key Words:jet electrodeposition flexible friction anticorrosion NdFeB
Abstract:Sintered neodymium (NdFeB) magnets are highly vulnerable to corrosion. To address this problem, flexible friction-assisted jet electrodeposition is applied. This technique can effectively and quickly prepare protective Ni coating on NdFeB magnets. Three kinds of jet electrodeposition are compared: non-friction, fixed friction-assisted and movable friction-assisted jet electrodeposition. The surface morphology of Ni coating is examined by scanning electron microscopy. X-ray diffraction is employed to evaluate the effect of friction on tissue structure. Corrosion of the nickel coating is characterized using an electrochemical workstation. Results indicate that flexible, movable friction improves the morphology of the jet-electrodeposited surface, and exhibits a (111) preferred orientation. In addition, compared with fixed friction, flexible, movable friction provides coatings with higher adhesion strength. Jet electrodeposition with flexible, movable friction also provides excellent corrosion resistance for the sintered NdFeB magnets, and corrosion current decreases from 104.5 mu A/cm(2) to 28.75 mu A/cm(2).
ISSN No.:1452-3981
Translation or Not:no
Date of Publication:2018-08-01
Co-author:wz,Qiu Mingbo,王开,tzj
Correspondence Author:Lida Shen