Novel photocatalytic coating for corrosion mitigation in 304LSS of dry storage canisters

Type 304L stainless steel (304LSS) is one of the candidate canister materials for storing radioactive spent fuels, usually near seashore environments along with nuclear power plants. During prolonged exposure dry storage canisters to saline environments, they are highly susceptible chloride induced stress corrosion cracking. Failure a not only would release isotopes into environment, but also lead costly replacement cracked canister. The objective this study develop multilayered titanium dioxide (TiO 2 ) composite coating on 304LSS substrate. With ultraviolet (UV) illumination, act as barrier and simultaneously offer cathodic protection against in substrate alloy. consists plain amorphous TiO over another cerium-doped (Ce-doped) coating. Electronic currents generated by photo-catalytic reaction under UV illumination were measured. Photo-electrochemical analyses surface morphology observations conducted evaluate performance Ce-doped coatings mitigation. Optimal amounts cerium doping that offered better photo-cathodic explored. Results indicated exhibited aerated 3.5% NaCl solutions than without doping. underlying was effectively charged during it able continuously electrons even after switched off, thus providing uninterrupted coated