The electrochemical corrosion potential of 304 stainless steel coated under water by hyper-velocity oxy-fuel and plasma spray techniques using noble metal doped powders was measured to evaluate the catalytic behavior in high temperature water under various water chemistry conditions. Thermal spray coatings of noble metal doped powders exhibited catalytic behavior for the recombination of oxygen and hydrogen in high temperature water which causes the corrosion potential to decrease well below a critical value of...
Keyterms: ECP, noble metal alloys, structural materials, high temperature water, thermal spray coatings, HVOF, PS.