Experimental Study of Corrosion Resistance of Nickel-Molybdenum Alloys in the Melt of Lithium and Beryllium Fluoride Salts

In this paper, we present the test results of the corrosion and mechanical resistance of the KhN80MTYu alloy and its modifications under dynamic nonisothermal conditions of circulation of a coolant with a molar composition of 0.66LiF–0.34BeF2 in the range of operating parameters of the MSR intermediate contour. The three most promising compositions of candidate alloys for the MSR are selected. In terms of the rate of uniform corrosion and mechanical properties, the alloys were shown to be capable of ensuring reliable operation of the structure for up to 30 years with maximum temperature of up to 690°C upon maintaining the melt redox potential in the range of EPBe = –(0.59–0.79) V.