Plant extract as green corrosion inhibitors for carbon steel substrate in different environments: A systematic review

Abstract

Green corrosion inhibitors are an innovative approach to corrosion prevention that has a low environmental impact and reduces corrosion rates to an adequate level, making them one of the most important modern corrosion prevention strategies. A variety of organic chemicals were examined to determine whether they could potentially reduce corrosion. Research indicates that these organic compounds' good inhibitory efficiency has been found when N, S, and O are present. However, they are costly and have a severe harmful effect on aquatic and animal life as well as the environment. Consequently, in order to accomplish the goal of using inexpensive, ecologically friendly, plentiful, and efficient molecules with very high inhibiting efficacy and minimal impact on the environment, natural products and plant extracts have been proposed. We conducted a systematic literature review on the effect of corrosion inhibition performance of plant-based green corrosion inhibitors. Following a filtration procedure that adhered to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria, we reviewed the publications on Scopus and Web of Science and found 35 that were relevant to the aim of the study. The protective film formation and adsorption mechanisms, as well as the effectiveness of natural compounds employed as green corrosion inhibitors for carbon steel in various acid conditions, are discussed in this article.