PROBLEM TO BE SOLVED: To provide a Ni-based self-fluxing alloy powder having suppressed fluidity during a remelting treatment in spray coating and parts excellent in corrosion resistance and abrasion resistance using the powder.SOLUTION: There are provided a Ni-based self-fluxing alloy powder having suppressed fluidity during a remelting treatment in spray coating containing, by mass%, C:0.01 to 0.9%, Si:3.0 to 5.0%, Cr:10 to 16.5%, Mo:4.0% or less, Cu:3.0% or less, Fe:15.0% or less, B:2.0 to 4.0%, O:50 to 500 ppm and the balance Ni with inevitable impurities and satisfying Si/B:1.2 to 1.7, and parts excellent in corrosion resistance and/or abrasion resistance using the powder.
