A review on corrosion inhibitors: Types, mechanisms, electrochemical analysis, corrosion rate and efficiency of corrosion inhibitors on mild steel in an acidic environment

Abstract

Corrosion is serious problem in many industries, and, unfortunately, metal structures in particular are susceptible to the damage it can cause. For this reason, it's important to take the necessary steps to protect against corrosion. Organic chemical compounds, which are significant and naturally occurring molecules, have been shown to be very effective corrosion inhibitors. According to research, chemical compounds that contain oxygen, sulphur, and nitrogen have the strongest inhibitory action. Organic and natural corrosion inhibitors protect metal surfaces by creating protective films. This review focused on the effectiveness of natural corrosion inhibitors and organic compounds in resisting corrosion. The review also examined how some of these compounds halted the corrosion of mild steel in acidic solutions using electrochemical impedance and polarization. Adsorption behaviour and thermodynamic variables were also examined. The study further used SEM micrographs to analyze the surface morphology of mild steel. In this review paper, it gives the types of corrosion, inhibitors, control measures and techniques for corrosion control of mild steel. This will give the inhibition mechanism, inhibition efficiency and effective method of corrosion control. Theoretical studies, Activation parameters adsorption studies, surface morphology was also discussed. Overall, this paper will give the glimpses of corrosion control and research gap in the present scenario. This study aims to encourage a wider use of organic corrosion inhibitors by providing a comprehensive overview of current research on this topic.

Keywords

• Corrosion inhibitor
• Metallic surface
• Economic aspects
• Eco-friendly
• Theoretical studies