Corrosion Mechanism and Improvement of Inconel Heat Component in High Temperature and High Pressure Water Environment

In a reactor thermal hydraulic test bench, the heating component in heat source simulation body was composed of a large number of Inconel (Inconel 690) tubes and a part of copper materials. In the case of energization, the Inconel tubes generated heat to heat the fluid. After a series of high temperature and high pressure (temperature 300℃, pressure 15.5 MPa) hot state test, serious corrosion occurred on the surface of Inconel and copper tubes. The heating components in the heat source simulation used in the reactor thermal hydraulic test were introduced in terms of material composition, material properties and corrosion, and the causes of corrosion were analyzed, and the improvement measures and results were given.