Effect of the 75ferrosilicon on the laser cladding on gray cast iron

•75ferrosilicon as a inoculation is introduced into the laser cladding.•Carbon ratio, phase transform and micro-hardness varies with 75ferrosilicon.•Grain size is the smallest at 0. 9 wt% 75ferrosilicon.•0.9 wt% 75ferrosilicon is the best proportion for the corrosion resistance.