Corrosion resistance of BIS 2062-grade steel coated with nano-metal-oxide mixtures of iron, cerium, and titanium in the marine environment

Abstract

BIS 2062-grade carbon steel is extensively used for fishing boat construction. The steel is highly susceptible to corrosion on the hull and welding joints under marine environment. Here, we demonstrate the application of a novel multifunctional nano-metal-oxide mixture comprised of iron, titanium, and cerium as a marine coating to prevent corrosion. The electrochemical performance of nano-metal-oxide mixture coatings, applied over boat-building steel, was evaluated at 3.5% NaCl medium. The nano-mixture surface coatings showed an efficient corrosion resistance with increased polarization resistance of 6043 Ω cm 2 and low corrosion current density of 3.53 × 10 −6 A cm −2 . The electrochemical impedance spectral data exhibited improvement in the polarization resistance of outermost surface and internal layers. The coating responded faster recovery to normal state when subjected to an induced stress over the coating. The nano-material in the coating behaves as a semiconductor; this enhanced electronic activity over the surface of the steel.

Nanocomposite coatings on steel for enhancing the corrosion resistance: A review

“…Nano metal oxide mixtures of Fe, Ce and Ti were used by Ashraf et al 95 to understand the coating performance on BIS 2062-grade steel which is mainly used for boat construction. They have observed that optimum concentration of nano-mixtures (0.005 % Fe 2 O 3 þ 0.01% CeO 2 þ 0.005% TiO 2 ) are very effective in corrosion protection with a polarisation resistance of $6043 cm 2 and low corrosion current density of 3.53 Â 10 À6 Acm À2 .…”

Biofouling inhibition for aquaculture cage nets through a coating nano zinc and silicon oxides incorporated with polyaniline

“…Nano mixtures having different properties coated over steel exhibited improved corrosion resistance [16] and few studies have been conducted using the nano materials of different properties in a mixture to prevent biofouling. Nano SiO 2 and ZnO are considered safe, due to their toxicity characteristics and environmental friendliness.…”

Influence of electrospun TiO2 nanowires on corrosion resistance and cell response of Ti50Zr alloy

“…Titanium dioxide has commonly been used as additives in anticorrosion coating in the recent years . Nano‐TiO 2 is an excellent cathodic inhibitor, photo‐catalyst, antimicrobial additive and antifouling agent .…”

“…Titanium dioxide has commonly been used as additives in anticorrosion coating in the recent years . Nano‐TiO 2 is an excellent cathodic inhibitor, photo‐catalyst, antimicrobial additive and antifouling agent . The TiO 2 NW are semiconductor materials with different properties from a flat titanium alloy surface where a very thin oxide layer is formed only on the surface and the bulk properties remain metallic .…”

“…[16] Nano-TiO 2 is an excellent cathodic inhibitor, photo-catalyst, antimicrobial additive and antifouling agent. [16] The TiO 2 NW are semiconductor materials with different properties from a flat titanium alloy surface where a very thin oxide layer is formed only on the surface and the bulk properties remain metallic. [17] Thus, the semiconductor properties of the n-type TiO 2 NW coating is expected to have an influence on surface properties and corrosion resistance of Ti50Zr alloy in the presence of light.…”