M Nezakat, R Gholamipour, A Amadeh, A Mohammadi, T Ohkubo
Journal of Magnetism and Magnetic Materials

The effect of Ti and C additions on the corrosion behavior of Nd{sub 9.4}Pr{sub 0.6}Fe{sub bal.}Co{sub 6}B{sub 6}Ga{sub 0.5}Ti{sub x}C{sub x} (x=0, 1.5, 3, 6) isotropic nanocomposite melt-spun ribbons in 3.5 wt% sodium chloride solution was studied. The melt-spun ribbons were annealed at 750 {sup o}C for 10 min in argon-filled quartz capsules. The microstructure of multiphase nanocrystalline samples and corrosion products was characterized using the X-ray diffraction and electron microscopy techniques. The electrochemical behavior was assessed using potentiodynamic polarization and electrochemical impedance spectroscopy. The results show that the addition of Ti and C increases the corrosion resistance of NdFeB ribbons; the best corrosion resistance was obtained for 1.5 wt% Ti and C content.

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