Recent findings on lignin-based wear and corrosion resistance coatings

Abstract The requirement for sustainable and environmentally friendly materials has led to the exploration of lignin as a potential candidate for protective coatings in various industrial applications. Recent researches demonstrate the feasibility of lignin-based coatings for enhancing wear and corrosion resistance. The lignin improved the coating’s barrier properties and prevented corrosive electrolytes from contacting the metal. The lignin additives also functionalised wear resistance coating. This review points out the improvements in using lignin extraction to produce high-quality materials suitable for corrosion and wear resistance coating purposes. However, the application of lignin in coatings faces significant challenges, primarily due to its heterogeneous and complex nature, which complicates the attainment of uniform and reliable coating qualities. Moreover, it emphasises the need for further studies on lignin to harness lignin’s potential. Future research needs include the development of standardised methods for lignin characterisation and modification, the exploration of novel lignin-based composites and the evaluation of lignin coatings in real-world applications. This review probes into the burgeoning field of lignin-based coatings, evaluating their potential for wear and corrosion resistance, and discusses the current state of research, challenges and future directions in this promising area.