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Polyvinyl butyral (PVB) is employed as a binder in the photocatalytic TiO2-PVB film for photocathodic protection (PCP) of metals, offering a promising solution to reduce corrosion in carbon steel (CS) and stainless steel (STS). In this study, PVB was incorporated into TiO2 nanoparticle coatings via electrophoretic deposition (EPD), aiming to enhance the cathodic protection efficiency of these metals.
The addition of PVB influenced the deposition yield of TiO2 nanoparticles, with a higher PVB content resulting in a lower deposition mass. This effect was observed when experiments were conducted at various applied potentials and deposition times. While PVB hindered the deposition efficiency of TiO2, it played a crucial role in improving the stability and adhesion of the photocatalytic films.
The TiO2-PVB EPD film demonstrated enhanced protection of stainless steel, extending the cathodic protection time compared to coatings without polyvinyl butyral. This research underscores PVB's valuable role in improving the performance of photocatalytic materials for corrosion prevention. PVB's incorporation into TiO2 films holds significant potential for developing cost-effective, eco-friendly coatings for metal protection in industrial applications, reducing reliance on more expensive and environmentally hazardous materials.

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