Frontiers in Organic Corrosion Inhibitors for Chloride and Acidic Media: A Review

Metallic materials have propelled human advancements for centuries. Nevertheless, the rapid degradation of metallic structures in corrosive environments is inevitable. To date, the demand for metal alloys in multiple sectors, including construction and transportation, continues to escalate, with the trend it is predicted to reach beyond 250% by 2050. Thus, the need for corrosion inhibitors (CI) with qualities of high efficiency, excellent solubility, low toxicity, and inexpensiveness drive researchers to examine various possibilities. Here, we review the novelty, methods, and outputs from the latest studies on organic CI with the primary purpose of protecting mild steel and stainless steel in salt and acidic solutions. We reviewed the effectiveness, synergism impacts, and technological availability of each inhibitor and also comprehensively discussed related mechanisms of metallic corrosion and inhibition of CI.