A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates

Abstract

Growth in nanocoatings technology is moving towards implementing nanocoatings in many sectors of the industry due to their excellent abilities. Nanocoatings offer numerous advantages, including surface hardness, adhesive strength, long-term and/or high-temperature corrosion resistance, the enhancement of tribological properties, etc. In addition, nanocoatings can be applied in thinner and smoother thickness, which allows flexibility in equipment design, improved efficiency, lower fuel economy, lower carbon footprints, and lower maintenance and operating costs. Nanocoatings are utilised efficiently to reduce the effect of a corrosive environment. A nanocoating is a coating that either has constituents in the nanoscale, or is composed of layers that are less than 100 nm. The fine sizes of nanomaterials and the high density of their ground boundaries enable good adhesion and an excellent physical coverage of the coated surface. Yet, such fine properties might form active sites for corrosion attack. This paper reviews the corrosion behaviour of metallic, ceramic, and nanocomposite coatings on the surface of metallic substrates. It summarises the factors affecting the corrosion of these substrates, as well as the conditions where such coatings provided required protection.

Super protective anti-bacterial coating development with silica–titania nano core–shells

“…Although there are certain chemical approaches available for the removal of degraded products, these methods have some disadvantages. 1 Microorganisms are also renowned for their potential to degrade synthetic compounds, and various microbial species are reported for paint degradation. Major groups of microbes, involved in paint degradation are bacteria and fungi.…”

Recently Emerging Nanotechnological Advancements in Polymer Nanocomposite Coatings for Anti-corrosion, Anti-fouling and Self-healing

“…Depending on the appropriate use of a coated material, this additional functionality may be versatile. Furthermore, functional coatings are separated into ease of cleaning, self-cleaning, anti-fouling, soft feeling, antibacterial [30] , and anti-viral [31] . Aside their unique behavior, PNC functional coatings must satisfy some expectations relative to their behavior, scratch and abrasion resistance.…”

Anticorrosion of WO<sub>3</sub>-Modified TiO<sub>2</sub> Thin Film Prepared by Peroxo Sol-Gel Method

“…Adding WO 3 into TiO 2 can promote the anticorrosion capability under visible light irradiation [4]- [15]. However, most of previous studies used powder form or sol in acidic solution [4] [14] [15] [16] [17]. The powder WO 3 -TiO 2 cannot be used to coat on substrate.…”