Evaluation of natural oil polyol hydrophobic acrylic-based coating incorporated with SiO2 nanoparticles for enhanced corrosion protection

PurposeThis study aims to fabricate the acrylic-based polymeric composite coating with a hydrophobic surface associated with natural oil polyol (NOP) and polydimethylsiloxane with the incorporation of 3 Wt.% SiO2 nanoparticle (SiO(2)np) against the corrosive NaCl media. Design/methodology/approachThe structural properties of the formulated polymeric composite coatings were investigated by using Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, water contact angle (WCA) and cross-hatch (X-Hatch) tests. The WCA measurement was used to study the surface wettability of the formulated polymeric composite coatings. The corrosion protection performance of the nanocomposite coated on the mild steel substrate was studied by immersing the samples in 3.5 Wt.% NaCl solution for 30 days using electrochemical impedance spectroscopy. FindingsThe enhanced polymeric composite coating system performed with an excellent increase in the WCA up to 111.1 degrees which is good hydrophobic nature and very high coating resistance in the range of 10(10) omega attributed to the superiority of SiO(2)np. Originality/valueThe incorporation of SiO(2)np into the polymeric coating could enhance the surface roughness and hydrophobic properties that could increase corrosion protection. This approach is a novel attempt of using NOP along with the addition of SiO(2)np.

Automated summary

This study aims to fabricate an acrylic-based polymeric composite coating with a hydrophobic surface by incorporating 3 Wt.% SiO2 nanoparticles, natural oil polyol (NOP), and polydimethylsiloxane. The structural properties of the coating were analyzed using various tests. The incorporation of SiO2 nanoparticles enhanced the surface roughness and hydrophobic properties, resulting in improved corrosion protection.