Peculiarities of high-temperature salt corrosion of Ni(L)–Hf–Cr₃C₂ alloy

The development of wear-resistant materials possessing high resistance to high-temperature salt corrosion is a pressing issue in ship gas turbine construction. The Ni(L)–Hf–Cr₃C₂ alloy, which contains hafnium from 16.5–17.5 wt%, is promising in this case. The addition of hafnium enables the formation of a structure maximum resembling the eutectic phase, with a melting point of 1200 + 10 °C, maintaining stable hardness within the range of 649–665 HV₁₀ and exhibiting an average corrosion rate of 0.18 mg/(cm² × h) in a 75% Na₂SO₄ + 25% NaCl environment at 900 °C. The results allow us to recommend this alloy as a base material for reinforcing the contact surfaces of marine gas turbine engine components.