The powders of Ni−P alloys containing 13% of phosphorus were obtained by precipitation from the solution. The oxidation of
Ni−P alloys in polythermal conditions was studied. It was found that oxidation of Ni−P alloys goes through stages and that
intermediate products of the oxidation are: Ni2P and Ni2P2O7. The final products of oxidation process are NiO and Ni3(PO4)2. The sequence of chemical reactions describing the oxidation of Ni−P alloys was proposed.