Corrosion protection of large-scale 304 stainless steel via Co-MOF coated the spaced TiO2 nanotube array photoanodes

In this paper, TiO 2 nanotube arrays with gap characteristics were designed and fabricated. Moreover, by adjusting the ratio of metal ions to ligands (1:20), a fully coated Co-MOF/TiO 2 composite photoanode was obtained; Secondly, tests such as XPS and EPR were adopted and combined with theoretical calculations to verify the construction of Type II heterojunctions, which promoted the separation of photogenerated electron-hole pairs and thereby enhanced the cathodic protection effect of the composite photoanode. Finally, to promote green and environmentally friendly anti-corrosion materials, an in-depth study was conducted on the anti-corrosion and anti-pitting effects of composite photoanodes on 304SS with different application areas (1cm 2 ,25cm 2 ,100cm 2 ).