Anti-Corrosion Evaluation of Organic and Pharmaceutical Compounds for Mild Steel in 3.5 wt% NaCl Solution

Abstract

Corrosion on mild steel is a significant concern as it is widely used in various industries for construction, machinery parts, pipelines, and other metal-based engineering applications. Corrosion can occur spontaneously and is inevitable. However, one of the most effective ways to combat it is with corrosion inhibitors. An azomethine compound can be identified by the presence of an imine functional group specifically the carbon-nitrogen double bond (C=N). The azomethine compound's structure with its electron-rich C-N bond has shown promising potential for chemical interactions including complexation with metals. In addition, the molecular structure of paracetamol contains heteroatoms and aromatic rings, which can impact their inhibitory properties. For this investigation, the selection was made to focus on organic compounds Benzylidene aniline and pharmaceutical compounds Paracetamol. These compounds were selected due to their unique properties that allow them to form a protective barrier on the surface of mild steel through adsorption. This barrier helps prevent corrosion when the steel is exposed to a corrosive environment.