Grafted Biopolymers as Corrosion Inhibitors

19 Industrially Useful Corrosion InhibitorsGrafted Biopolymers as Ideal Substitutes

Farhat A. Ansari^1,* and Hariom K. Sharma²

¹ Faculty of Pharmaceutical Chemistry, Hygia Institute of Pharmaceutical Education and Research, Faizullahganj, Lucknow, 226020, Uttar Pradesh, India ² Engineering Department, University of Technology and Applied Sciences (UTAS), Salalah, Dhofar, Sultanate of Oman ^* Corresponding author

19.1 Introduction

From the very beginning of the Industrial Era in the 1800s, corrosion has been a serious issue because most metals in use since then are exposed to moisture in the environment, resulting in unavoidable atmospheric corrosion. In 1938, Wanger et al. [1] concluded that the cause of corrosion took place largely at the metal-electrode interface. Corrosion generally occurs when metal is subjected to an atmosphere where the outermost portion of the metal thins away due to chemical or electrochemical action or exposure and the metals or alloys become rusted as a result [2]. Multiple methods are used to safeguard metals and their alloys [3], such as utilizing substances to generate a protective coating of films, and transferring impressed current to shield the cathodes—just to name a few. Corrosion can be reduced in some cases due to the auto electro-chemical process.

Corrosion inhibitors are substances known to prevent corrosion from occurring and have been in use for decades [4]. In general, there are four kinds of environments in which corrosion inhibitors ...