Abstract: Water glass was used as binder in adding rare earth (RE) to NiCrBSi powders, and the feasibility was evaluated by observing distribution of RE in composite powders and usability of powders, and the microstructure and corrosion resistance of corresponding spray-fused coating were also determined. The results showed that RE could uniformly adhere to the surface of alloy powder, and the fluidity of composite powders is good. Water glass was removed in the form of slag during spray-fusing, and no adverse effects were discovered for the microstructure and corrosion resistance of alloyed coating. By the way, it is important to choose suitable glutinosity of water glass.