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.

Citation

Ong, G., Shafaamri, A., Wonnie Ma, I.A., Kasi, R. and Subramaniam, R. (2022), "Development and characterisation of multifunctional composite coatings using bio-based additives", Pigment & Resin Technology, Vol. 51 No. 2, pp. 129-139. https://doi.org/10.1108/PRT-05-2020-0049