Unleashing the power of polymer surfactants: novel corrosion inhibitors for mild steel in hydrochloric acid

• K.Z. Abdulsada¹, A.Y.I. Rubaye¹, F.I. Hamed¹, N.I. Khaled¹, R.K. Zaidan² and A.A. Alamiery^3,4

¹ Department of Chemical and Petrochemical Techniques Engineering, Basra Engineering Technical College, Southern Technical University, Basra, Iraq
² Chemistry Department, College of Science, Basrah University, Basrah, Iraq
³ Energy and Renewable Energies Technology Center, University of Technology, Baghdad, P.O. Box 10001, Iraq
⁴ Department of Chemical and Process Engineering, Faculty of Engineering and Build Environment, Universiti Kebangsaan Malaysia, P.O. Box 43600, Bangi, Selangor, Malaysia

Abstract: The synthesis and characterization of two surfactant polymers containing carboxylic groups at the head are presented in this study. Our investigation was focused on mild steel, the target metal surface. The strategy required reacting phthalic anhydride with 1,12- and 1,18-diamine to produce useful surfactant polymers which can resist corrosion. In order to determine the characteristics and chemical structure of these polymers, Fourier Transform Infrared Spectroscopy (FTIR) were employed in the analysis. The analysis revealed these substances have the ability to inhibit corrosion in mild steel. Using the Tafel plot method, electrochemical experiments were carried out to evaluate their effectiveness as corrosion inhibitors. In order to simulate the aggressive environments, experiments were conducted in a 1 M hydrochloric acid (HCl) solution. At a concentration of 1000 ppm and 25°C, the polymers (A1 and A2) had an inhibitory effectiveness of 74.94% and 77.53%, respectively. These results suggest a progress advance in the reduction. It points the way to possible uses of these polymers in shielding mild steel structures against corrosion under challenging circumstances. This investigation proves that environmental friendliness and ease of synthesis increase their potential for industrial application in resolving corrosion-related issues.

Keywords: tailored polymer surfactants, high-performance corrosion inhibitors, novel surface-active compounds, electrochemical Tafel analysis, protection in harsh environments

Int. J. Corros. Scale Inhib., 2023, 12, no. 4, 2198-2020
doi: 10.17675/2305-6894-2023-12-4-40

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