A zinc coating method for Nd–Fe–B magnets

Corrosion resistance and mechanical properties of pulse electrodeposited Ni–TiO2 composite coating for sintered NdFeB magnet

“…To improve the corrosion resistance of sintered NdFeB magnet, lots of attempts have been done, such as alloy additions and surface coating by either metals (commonly Ni or Zn) or polymer resin [6][7][8][9]. Over the past few years, metal coatings, especially metal matrix composite coatings containing nano-particles which exhibit excellent properties including higher wear and corrosion resistance, higher hardness, more excellent self-lubricating in comparison with single metal coatings have been more widely studied.…”

Electrochemical corrosion behaviors and protective properties of Ni–Co–TiO2 composite coating prepared on sintered NdFeB magnet

“…In order to improve the corrosion resistance of the sintered NdFeB magnet, numerous attempts have been made, such as alloy additions and surface treatment [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], among which the electroplating of metal coatings is one of the most popular methods. As a traditional surface treatment technique, electroplating of metal coatings has been brought for surface modification of many metals such as Al, Fe, NdFeB, Mg, etc.…”

The electrochemical corrosion behavior of sealed Ni–TiO2 composite coating for sintered NdFeB magnet

“…In order to improve the corrosion resistance of sintered NdFeB magnet, numerous attempts have been made, such as alloy additions and surface treatment [6][7][8][9][10][11][12][13][14][15][16], among which the electroplating of metal coatings is one of the most popular methods. As a traditional surface treatment technique, electroplating of metal coatings has been brought for surface modification of many metals, such as Al, Fe, NdFeB, Mg, etc.…”

“…In addition, it is well known that pulse electrodeposition is one of the most effective methods in fabrication of coatings due to its independently controllable parameters and higher instantaneous current density when compared to traditional direct current electrodeposition [24][25][26]. In addition, with the review of the literatures about the corrosion protection for sintered NdFeB magnet [6][7][8][9][10][11][12][13][14][15][16], it is also found that most of the literatures in relation to the corrosion protection for sintered NdFeB magnet focused on the test of short-term anticorrosive properties, but seldom the test of the long-term anticorrosive properties. Of the two, the latter is far better than the former to reflect the protective properties of coating for sintered NdFeB magnet.…”