Title :
The effect of absorbed hydrogen on the corrosion behavior of NdFeB alloys
Author :
Chang, Kuo En ; Warren, Garry W.
Author_Institution :
Dept. of Metall. & Mater. Eng., Alabama Univ., Tuscaloosa, AL, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
The effect of hydrogen on the corrosion behavior of sintered NdFeB alloyed with different elements (Co-V and Nb) is compared using electrochemical galvanostatic and potentiodynamic polarization measurements in 6M KOH. Experimental results show that cathodic currents inject or `charge´ hydrogen into the NdFeB lattice, which can then be oxidized or `discharged´ by the application of anodic currents. Corrosion resistance can be quantified in terms of exchange currents which are shown to be a function of hydrogen content and selection of alloying elements
Keywords :
adsorption; alloying additions; boron alloys; corrosion protection; ferromagnetic materials; iron alloys; neodymium alloys; permanent magnets; H; NdFeB; NdFeB alloys; alloying elements; cathodic currents; corrosion behavior; corrosion resistance; electrochemical; galvanostatic; potentiodynamic polarization measurements; Absorption; Alloying; Chemicals; Circuits; Corrosion; Electrodes; Hydrogen; Niobium alloys; Oxidation; Polarization;
Journal_Title :
Magnetics, IEEE Transactions on
