Corrosion resistance-able rare-earth metal magnet and manufacturing process

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On a surface of a rare earth permanent magnet R-T-M-B wherein R is a rare earth element, T is Fe or Fe and Co, M is Ti, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W or Ta, 5 wt% ≤ R ≤ 40 wt%, 50 wt% ≤ T ≤ 90 wt%, 0 wt% ≤ M ≤ 8 wt%, and 0.2 wt% ≤ B ≤ 8 wt%, a solution comprising a flake fine powder of Al, Mg, Ca, Zn, Si, Mn or an alloy thereof and a silicone resin is applied and baked to form an adherent composite coating, thereby providing a corrosion resistant rare earth permanent magnet.