Heterocyclic Compounds as Corrosion-Inhibiting Agents for Different Metals in Acidic Media: A Review
摘要
Numerous sectors and the global steel infrastructure are impacted by corrosion, which deteriorates materials or metals through chemical and electrochemical reactions. Heterocyclic compounds are very effective corrosion inhibitors in acidic environments because they can form a protective layer on metal surfaces by adsorption. Adsorption of molecules containing heteroatoms (such as nitrogen, sulfur, or oxygen) with pi-electrons and lone pair electrons onto the metal surface provides this protection. The structure of these compounds determines their effectiveness as nitrogen-containing rings in these compounds slow down both anodic and cathodic corrosion reactions. By shifting their electron cloud in the direction of the heteroatoms and forming a tight protective layer over metal, the most popular heterocyclic corrosion inhibitors can perform a coordination function. The current review article illustrates how different substituents found in heterocyclic compound structures affect corrosion inhibition in different acidic conditions. The corrosion inhibition mechanism for heterocyclic compounds is briefly discussed in this article. It also discusses the benefits and drawbacks of using heterocyclic compounds as anticorrosive agents. This paper compares heterocyclic compounds with other conventional corrosion inhibitors and highlights current advancements in the synthesis of heterocyclic compounds to lessen corrosion. In addition, this review article shows that heterocyclic moity is a crucial component needed to create a new, hybrid, and environmentally friendly anticorrosive agent.