Coordination bonding and corrosion inhibition characteristics of chalcone compounds for metals: An inclusive review based on experimental as well as theoretical perspectives

Abstract

Chalcones exhibit fundamental characteristics that are required for good corrosion inhibitors. Their substantial potential for corrosion inhibition comes from their ability to coordinate with and bind to metallic surfaces. Chalcone compounds have been found to be extensively efficient in protection against corrosion under diverse corrosive environmental conditions. Their corrosion-inhibiting action is attributed to their capacity to be absorbed onto surfaces and form protective films, facilitated by their electron-rich centres. These chemical entities manifest remarkable ligand properties. This comprehensive study endeavours to elucidate the anti-corrosion characteristics of chalcone compounds by describing their distinctive coordination and bonding characteristics. Additionally, the article explores the fundamental role played by its substituent in boosting the inhibition effectiveness of chalcone compounds. Further enhancement of chalcone's inhibition performance is achievable through structural modifications. Incorporation of functional groups with established inhibitory prowess leads to decelerated corrosion rates and sharp efficiency. This augmentation in corrosion inhibition is achieved by leveraging the inherent attributes of these modifying groups. Also, this study encompasses an in-depth analysis of the theoretical investigation of key parameters, including DFT, HOMO, LUMO and other variables. These parameters are scrutinized with respect to their electronic and molecular structures that influence the chalcones ability to suppress corrosion. Further, this study includes the benefits of using chalcones over other structurally similar organic compounds.