Comparison of different concentrations efficiency of Artemisia and Sesamum plants extractors as corrosion inhibitors for medium steel specimens in 0.5M HCl at temperature of 25°C

Abstract

Corrosion of steel is the major problem in building, petroleum pipelines, or plants, so use of protection techniques is most important to reduce metal degradation or plant stopped due to failure of machines that lead to increase of maintenance or replace part damaged cost. The purpose of this study is to investigate the effect of an inhibitor on the corrosion inhibition potential of mild steel using organic inhibitors from Artemisia and Sesamum plant extracts. The study was carried out using the weight loss technique. Using different concentrations of plant extracts from each type at 25℃ and measuring the weight of medium steel (MS) samples before and after immersion in the media of HCl acid and inhibitor. The results obtained showed that the inhibition efficiency of the extract increases with an increase in the concentration of the extract. The adsorption isotherm of natural product on the steel has been determined.