Development and characterisation of multifunctional composite coatings using bio-based additives

Abstract

Purpose The purpose of this paper is to develop the bio-composite organic coatings by adding the bio-based additives that are extracted from banana peels and henna leaves as the organic corrosion inhibitors. Design/methodology/approach Bioactive constituents with inhibition properties are extracted from banana peels and henna leaves by using ethanol to form the ethanolic extract. The inhibiting efficiency of these bioactive constituents on mild steel corrosion in 3.5% sodium hydroxide (NaCl) solution is investigated. The investigation is performed using electrochemical impedance studies for 30 days. The optical and adhesive properties of the bio-composite coating systems have also been studied. Findings The best protection is obtained as the loading ratio of the banana peels ethanolic extract (BPEE) and henna leaves ethanolic extract (HLEE) are 10 Wt.% and 30 Wt.%, respectively. Overall, the results obtained show that the BPEE and HLEE not only enhance the optical properties but also can serve as an effective inhibitor for corrosion without affecting the adhesiveness of the neat acrylic properties. Originality/value Banana peels and henna leaves consist of bioactive constituents that have anti-corrosion properties which could inhibit corrosion.

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

“…In addition, there is no peak of 2,273 cm À1 which represents the N = C = O band disappeared in the AHPN spectrum . It can be confirmed that the coating had fully cured and the wellcrosslinking between acrylic resin and the polyisocyanate (NCO) curing agent (Ong et al, 2021).…”

“…Corrosion is the degradation of the material due to chemical reactions with environmental matters which acted as corrosive agents toward a metal surface (Ong et al , 2021). It is a natural process that cannot be avoided for most metal because by nature, the metal will intend to return to its natural state which is oxide form.…”

The anti-corrosion performance of reinforcement behaviour of silica from different sources in bio-based paints

“…The electrochemical impedance method was used to evaluate the corrosion performance. As a result, they revealed that banana peels and henna leaves can be used as anti-corrosion biocomposites (Ong et al , 2022).…”