Grafted Biopolymers as Corrosion Inhibitors

14 Grafted Starch Used as Sustainable Corrosion Inhibitors

Taiwo W. Quadri^1,*, Lukman O. Olasunkanmi^2,3, Omolola E. Fayemi⁴, and Eno E. Ebenso¹

¹ Centre for Material Science, College of Science, Engineering and Technology, University of South Africa, Johannesburg, 1710, South Africa² Department of Chemistry, Faculty of Science, Obafemi Awolowo University, Ile Ife, 220005, Nigeria³ Department of Chemical Science, University of Johannesburg, P.O. Box 17011, Doornfontein Campus, Johannesburg, 2028, South Africa⁴ Department of Chemistry, School of Chemical and Physical Sciences and Material Science Innovation & Modelling (MaSIM) Research Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho, 2735, South Africa^* Corresponding author

14.1 Introduction

14.1.1 Inhibition of Metallic Corrosion via Chemical Compounds

The use of chemical compounds commonly called corrosion inhibitors has been widely adopted as the first line of defense against metal and alloy dissolution. It has been reported to be reliable, efficient, and cost-effective for industrial applications [1, 2]. Over the years, numerous chemical compounds have been assessed as potential inhibitors of metallic deterioration [3–8]. Among these are inorganic compounds such as nitrites, silicates, and chromates which have been found to successfully inhibit metallic corrosion by adsorption. They are sources of environmental toxicity, however, and thus their usage has been discouraged. ...