The effect of Nb and Ga addition on the corrosion resistance of Nd‐Fe‐B permanent magnets in acidic environments
Abstract
This paper describes the effect of alloying elements such as Nb and Ga on the corrosion behaviour of Nd‐Fe‐B permanent magnetic alloy. The results revealed that the alloying elements are not helpful in improving the corrosion resistance of the base magnet; rather their presence makes the base alloy highly vulnerable to corrosion in acidic environments. In particular, Nb addition is more detrimental to corrosion as was evidenced by potentiodynamic, cyclic polarisation, Ecorr vs time, electrochemical impedance and SEM results. The studies also showed that the degradation of the alloys with and without alloying addition takes place due to preferential dissolution of grain boundaries.
Subject
General Materials Science,General Chemical Engineering
Reference27 articles.
1. Bala, H., Szymura, S. and Wyslocki, J.J. (1991), J. Mater. Sci., Vol. 25, p. 571. 2. Bala, H., Pawlowska, G., Szymura, S., Sergeev, V.V. and Rabinovich, Y.M. (1990a), J. Magn. Magn. Mater., Vol. 87, p. L255. 3. Bala, H., Szymura, S., Rabinovich, M.Y., Sergeev, V.V., Pawlowska, G. and Pokrovskii, D.V. (1990b), Rev. Phys. Appl., Vol. 25, p. 1205. 4. Burzo, E., Redziwiatr, A.T. and Wallace, W.E. (1987), Solid State Commun., Vol. 61, p. 57. 5. Buschow, K.H.J. (1984) Wohlfarth, E.P. and Buschow, K.H.J. (Eds), Ferromagnetic Materials, Vol. 4, Elsevier Science,North Holland, Amsterdam, p. 109.
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