Experimental and Runge–Kutta Method Simulation to Investigate Corrosion Kinetics of Mild Steel in Sulfuric Acid Solutions

Ismaeel M Alwaan

doi:10.1155/2018/9087101

Abstract

The mild steel is extensively used in different industrial applications and the biggest problem in the application of mild steel is corrosion. In this work, the reaction kinetics of mild steel with sulfuric acid at different concentrations and at different temperatures were studied in combination with the experimental data and theoretical approach using the Runge–Kutta method. The results revealed that the rate of reaction constant for temperatures in the range of 30–50°C was changed from 2618 to 2793 L3/mol3.h, respectively. The order of reaction of mild steel was 4th order in all temperature ranges. The enthalpy, entropy, and Gibbs free energy of mild steel reaction at a temperature of 298 K were estimated. The activation energy (E/R) of the reaction was 4.829 K. It was concluded that the sulfuric acid reaction with mild steel occurred easily and the inhibitors should be used in these systems.

Highlights

Mild steel alloy has been extensively utilized in manufacture as a substance for reaction containers, pipes, etc. [1]
The present paper explores corrosion kinetics of mild steel in sulfuric acid solutions using weight loss techniques
The corrosion of mild steel was studied in combination between the theoretical and experimental data to analyse the kinetics of reaction with sulfuric acid (H2 SO4) at various concentrations (0.1–0.5 M)

Summary

Introduction

Mild steel alloy has been extensively utilized in manufacture as a substance for reaction containers, pipes, etc. [1]. The rind, seed, and peel extract of watermelon were studied as corrosion inhibitor for mild steel in hydrochloride acid media [7]. The simulations investigation was adopted to investigate corrosion-resisting aluminum and stainless steel pipes using 3D finite element model [8]. Corrosion inhibition mechanism of two-mercaptoquinoline Schiff based on mild steel surface is investigated by quantum chemical calculation and molecular dynamics simulation [15]. Runge–Kutta method was extensively used for solving the different model of corrosion. The Runge–Kutta method was used to solve the two-phase homogeneous model numerically and the major attitude of activated corrosion outputs [18]. The Runge–Kutta method was applied in an endeavor to obtain insights into the mechanism of corrosion of mild steel face at the molecular level

Experimental

Theoretical

Results and Discussion

Conclusion