Research Progress of Anticorrosion Coatings for Sintered NdFeB Permanent Magnet

Many researches have focused on improving the anticorrosion performance of sintered NdFeB magnet.Adding metal elements and plating conventional coatings could not alleviate the corrosion of the sintered NdFeB magnet satisfyingly.The anticorrosion status of the conventional coatings on the sintered NdFeB magnet is analyzed.Using Ni-P coating as the interlayer,the NiP/TiO2 composite films on NdFeB magnet could be prepared by the electroless plating nickel and sol-gel technique.