Erosion corrosion in stainless steel pipe under water vapour two-phase flow conditions

High-speed two-phase water vapour flows in the outlet portion pipes of nuclear power stations. Erosion corrosion experiments of stainless steel were performed by the use of Component Test Loop, in which high-temperature pressurized water vapour is circulated, under test conditions of all volatile treatment with steam phase velocities 10–40 m/s (steam quality 15%). The erosion corrosion losses were estimated by weight differences of pipe specimens before and after tests. Erosion corrosion losses are very small and almost constant for velocities of two-phase flow.