Diethanolamine: An Inhibitor of Mild Steel Corrosion in Cassava Fluid Extract

International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue V, May 2020 | ISSN 2321–2705

Diethanolamine: An Inhibitor of Mild Steel Corrosion in Cassava Fluid Extract

Igwe, P. U.¹, Edori, E. S.^2*
1Evomec Global Services Limited 50A GRA Phase 2, Port Harcourt, Rivers State, Nigeria
²Department of Chemistry, Ignatius Ajuru University of Education, Rumuolumeni, P. M. B. 5047, Port Harcourt, Rivers State, Nigeria
*Corresponding Author

Abstract: – The effect of diethanolamine on the corrosion inhibition of mild steel in cassava fluid was investigated by weight loss measurements. The investigation was conducted at temperatures of 298K and 333K at concentration of 0.5M, 1.0M, 1.5M and 2.0M concentrations of diethanolamine in cassava fluid. The results showed that weight loss recorded decreased with concentration and temperature. Weight loss decrease from 0.0503mm, blank solution to 0.0101mm in 2.0M concentration at 298K and a decrease in corrosion rate of 0.0789mm/yr to 0.0411mm/yr under the same conditions on the 3rd day. Weight loss also decreased from 0.0243mm blank solution to 0.0002mm in 2.0M concentration and corrosion rate also decreased from 0.0380mm/yr to 0.0003mm/yr under the same concentration at 333K, on the 3rd day. Further decrease was also recorded as the day progresses to the 9th day. The highest efficiencies recorded were 98.01% at 0.5M concentration at 298K and 9918% at 2.0M concentration at 333K. The recorded values showed that diethanolamine is an efficient corrosion inhibitor of mild steel in cassava fluid.

Keywords: Cassava fluid, weight loss, diethanolamine, mild steel, corrosion rate, metal coupon.

I. INTRODUCTION

The deterioration of materials made of steel which is widely used in the chemical, petrochemical and agricultural industries have created a lot of problems. The chemical, physical and even the structural states of these material equipment made of steel are greatly affected because of the reaction these materials undergo with the ambient environment. Such decay and wearing away of the physical/chemical nature of material of construction due to its reaction with the environment is known as corrosion (Osarolube et al., 2004). The corrosion that sets in at a certain period of time make the material of construction to perform and function ineffectively, there by affecting the whole industrial processes and resulting in equipment failure (Amuda et al., 2008).
Corrosion problem is associated with enormous cost and thereby affect the economy of any given nation. An estimated 5% income of industrialized nations such as the U.S is spent on difficulties that arises from corrosion attack on equipment (NACE, 2007). Due to the increase and rise in population, there is also increase and rise in agro processing industries, since there is a high demand for food.

Read More