The effect of noble metal chemical addition on the electrochemical corrosion potential (ECP) behavior and flow-assisted corrosion of carbon steel in 288°C water under various water chemistry conditions was evaluated. It was shown that the noble metal on the surface shifted the ECP to the noble direction in reducing environments at low oxygen concentrations by catalyzing the hydrogen/oxygen water reduction reaction and hence decreased the flowassisted corrosion rate (or erosion corrosion rate) of carbon steel. Keywords: noble metal chemical addition, BWR, high temperature water, carbon steel, flow-assisted
corrosion, ECP