Study of Kinetics and Inhibition Efficiency by Isoquinoline-5-Carboxaldehyde for Carbon Steel Corrosion in HCl

Abstract

In this paper, a study of kinetics and inhibition efficiency by isoquinoline-5-carboxaldehyde of carbon steel corrosion in hydrochloric acid is conducted. The method of weight loss and hydrogen gas evolution was used with various inhibitor concentrations ranging from 150-450 parts per million with several temperatures from 40-60°C. Our results showed that increasing inhibitor concentrations and temperature led to an increase in the inhibition efficiency; this indicates both the adsorption of a film layer on a metal surface and the efficacy of the inhibitor by the attendance of oxygen and nitrogen atoms that have an active part in the adsorption process. In this study entropy, activation, and enthalpy energy were calculated.