Abstract
Polydopamine (PDA) coating was prepared on TiO2 nanotubes array by dip-coating method to improve the photocathodic protection performance of TiO2. The morphology, crystal structure, valence state and elemental composition of the [email protected]2 were characterized. The electrochemical tests of open-circuit potential (OCP) and photocurrent density curves were used to characterize their photocathodic protection effects for 304 stainless steels (304SS). The result shows that the TiO2 combined with PDA can effectively prevent the corrosion of 304SS under visible light irradiation. Moreover, through stability test and immersion test, the sample has good stability and it also has protective effect for 304SS in the dark state.
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