Corrosion Combating Efficacy of Leaves and Stem Extract of Naturally Occurring Plants Solanum xanthocarpum and Salvodera persica on Aluminium in Acid Media

Abstract

The inhibitory impact of extracts from the leaves and stem of Salvodera persica and Solanum xanthocarpum on the corrosion of aluminium in a 2N HCl solution was assessed using gasometric and weight loss methods. The findings showed that the corrosion inhibition efficiency increased on increasing plant extract concentration. Green inhibitors adsorb on the surface to form protective film which displace water and protect it against deteriorating. Effective organic corrosion inhibitors contain nitrogen, oxygen, sulfur and phosphorus with lone electron pairs as well can contain structural moieties with \(\pi\)-electrons that interact with metal favoring the adsorption process. The percentage inhibition efficiencies obtained through weight loss were reasonably consistent with those obtained through the gasometric method. Data analysis reveals that the combating efficacy of Salvodera persica outperforms that of Solanum xanthocarpum. However, Salvodera persica leaves extract outperforms Salvodera persica stem extract in terms of combating power. Plant extract can be considered as promising industrial resource for protection of metals due to their environmental acceptability, readily availability and nontoxic nature.