Noori, M., M. Momeni, et al. Alcohol 7.284.86 (2012): 83-2.
This study examined the performance of stearamide as a corrosion inhibitor for mild steel in hydrochloric acid (HCl) environments. The adsorption characteristics and efficiency of the inhibitor were analyzed using electrochemical methods to identify its potential in practical industrial conditions.
Methodology: Since the selected inhibitor was insoluble in water, it was dissolved at a concentration of 10,000 ppm in an organic solvent such as isopropyl alcohol and dimethyl sulfoxide (DMSO). The mild steel was then dipped in each solution for 7, 15, 30, and 60 minutes for adsorption of stearamide on the surface of metal, followed by the transfer of sample to a 0.1M HCl solution. Thereafter, the corrosion resistance of mild steel was tested in the acidic solution using potentiodynamic polarization, EIS, and LPR.
Key Findings:
· Stearamide exhibited inhibition properties in hydrochloric acid due to its adsorption on the metal surface.
· The optimal exposure time was 15 minutes in both solvents, resulting in efficiency values of 90% for the isopropyl alcohol solution and 83% for the DMSO solution.
· As an adsorptive inhibitor, Stearamide reduces anodic dissolution and slows the hydrogen evolution reaction by blocking active sites on the metal surface.
· Since both Stearamide and isopropyl alcohol demonstrate inhibition properties, the electrochemical results suggest a synergistic effect when combined, with a synergism parameter value of 1.141.
Dhoni, R., M. Ginting, et al. IOP Conference Series: Materials Science and Engineering. 1003, 1, 2020.