Corrosion Inhibition Using Hibiscus Rosa-Sinensis Extract for Mild Steel in an Acidic Medium

Abstract One significant problem constantly associated with the oil and gas production system is corrosion. As water is an integral part of this system, corrosion among the piping is inevitable. Corrosion tends to disintegrate the piping substance, making it fragile and easy to rupture. The disintegrated parts of the piping could block the system, causing a decline in pressure and contaminating the fluid. Essentially, industries use inhibitors to retard corrosion, and generally, these inhibitors are toxic and exhibit carcinogenic properties. However, these vital inhibitors are still being used in small quantities due to probably non-availability or Sufficient, natural-based corrosion inhibitors. Accordingly, the current study describes the potential of using Hibiscus Rosa-Sinensis Extract as a potential natural corrosion inhibitor for mild steel in Hydrochloric Acid (HCl), an acidic medium with a molarity of 12.178M diluted with distilled water. The method of assessment used in this study is the Weight Loss Method. The effectiveness of Hibiscus Rosa-Sinensis Extract was characterized in terms of metal weight loss and inhibitory efficiency compared to the Conventional inhibitor Disodium Hydrogen Phosphate. Results showed the optimum inhibition efficiency (IE) for mild steel using the same volumes and concentrations for the natural and conventional corrosion inhibitors: 0.3, 0.6, 0.9, 1.2, and 1.5g/L. The inhibition efficiency of Hibiscus Rosa-Sinensis was higher than the Disodium hydrogen Phosphate at concentrations of 0.3g/L, 0.6g/L, 0.9g/L, and 1.2g/L, 1.5g/L. At the same time, after the analysis during the 14-day interval. The commercial inhibitor performed the least in all the concentrations. Hibiscus Rosa-Sinensis and Disodium hydrogen Phosphate attained a maximum inhibition efficiency of 93.72% and 39.24%, respectively, during the 14 days. The inhibition efficiency increased with increasing inhibitor concentration and decreased with immersion time. In addition, the inhibition efficiency shows that the Hibiscus Rosa-Sinensis Extract is more effective after 14 days in the different contractions and volumes. The natural inhibitor performed far better than the conventional inhibitor (Disodium hydrogen Phosphate) used to test.