Grafted Biopolymers as Corrosion Inhibitors

15 Grafted Cellulose as Sustainable Corrosion Inhibitors

Ali Asghar Javidparvar¹, Abdolreza Farhadian^2,3,*, and Ali Reza Shahmoradi⁴

¹ School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 11155–4563, Tehran, Iran ² Department of Polymer & Materials Chemistry, Faculty of Chemistry and Petroleum Science, Shahid Beheshti University, GC, 1983969411, Tehran, Iran ³ Department of Petroleum Engineering, Kazan Federal University, Kremlevskaya str. 18, 420008 Kazan, Russian Federation ⁴ Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran^* Corresponding author

15.1 Introduction

Biopolymers have recently attracted attention for application as organic corrosion inhibitors (OCIs) due to their large molecular size and multiple adsorption sites [1, 2]. The presence of different functional groups in the chemical structure of these OCIs facilitates their adsorption on the immersed metal surface in corrosive electrolytes and blocks a large surface area of metals [3]. The inhibition efficiency of bio-polymers as OCIs in corrosive electrolytes depends on their molecular size, the number of aromatic rings, and abundance of heteroatoms (such as O, N, S, and P), and activity centres for adsorption on the immersed electrode surface [4].

Cellulose is a well-known biopolymer introduced by Payne in 1838 with the experimental formula (C₆H₁₀O₅) [5]. It is widely found in plants that are used as raw materials to produce ...