Analytical and Bioanalytical Electrochemistry is an international scientific journal published online by the Center of Excellence in Electrochemistry at the University of Tehran, Tehran, Iran. The journal was published quarterly from 2009 to 2011, bimonthly from 2011 to 2018, and has been published in at least eight issues per year since 2018. Analytical and Bioanalytical Electrochemistry - 16 9 2024 09 30 Corrosion Protection Performance of a Derivative of Quinoline [5-((3-Propyl-1H-Pyrrol-1-Yl) Methyl) Quinolin-8-Ol] PPMQ On Carbon Steel in Hydrochloric Acidic Solution 1 M 862 880 716172 10.22034/abec.2024.716172 EN Chadine Belmejdoub EMDD_CERNE2D, Mohamed V University of Rabat, EST Salé, Morocco Laboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, Morocco Benbouya Khalid EMDD_CERNE2D, Mohamed V University of Rabat, EST Salé, Morocco Issam Forsal Laboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, Morocco 0000-0003-2769-8499 Sara Lahmady Laboratory of Engineering and Applied Technologies, School of Technology, Beni Mellal, Morocco 0000-0003-2769-8499 Mohamed Rbaa Laboratory of Organic Chemistry, Catalysis and Environment, Faculty of Sciences, Ibn Tofail University, PO Box 133, 14000, Kenitra, Morocco Rachid Touir Regional Center for Education and Training Professions (CRMEF), Kenitra, Morocco 0000-0003-2796-2157 Journal Article 2024 02 25 Organic inhibitors play a crucial role in the corrosion inhibition process. In this work, the performance of the derivative of quinoline PPMQ against corrosion of carbon steel in the acidic medium HCl 1 M was assessed using electrochemical methods. The findings of the experiments showed that the inhibitor had a strong inhibitory impact on the metal tested in the hydrochloric acid solution. The outcomes of the study displayed that the inhibition efficiency of the tested inhibitor enhanced with its concentrations and remained almost stable during immersion time while decreasing slightly with rising temperature. Electrochemical measurements of this study showed that the corrosion was greatly decreased by the organic inhibitor through a charge transfer mechanism with a high inhibition efficiency of 95.58% at an optimal concentration of 10^-2 M at 293 K. While potentiodynamic polarization data reported that the inhibitor was a mixed-type inhibitor. PPMQ was inclined towards the Langmuir adsorption isotherm by spontaneous chemical-physical adsorption on the surface of carbon steel. Additionally, thermodynamic and activation data revealed that this action occurs through an endothermic process. Scanning electron microscopy findings showed that the inhibitor’s molecules form a protective layer, which confirms the electrochemical results. https://www.abechem.com/article_716172_f13ca59e574a14d28a6d715662875065.pdf