Unlocking the Power of 4-Acetamidoantipyrine: A Promising Corrosion Inhibitor for Preserving Mild Steel in Harsh Hydrochloric Acid Environments

Document Type : Original Article

Authors

1 Department of Mechanical Engineering, Tikrit University, College of Engineering, P. O. Box 42. Iraq

2 Applied Science Department, University of Technology-Iraq, P.O. Box: 10001, Baghdad, Iraq

3 Ministry of Youth and Sports, P.O. Box: 10001, Baghdad, Iraq

4 Production Engineering and Metallurgy, University of Technology, P.O. Box: 10001, Baghdad, Iraq

5 Department of Physics, College of Science, University of Baghdad, P.O. Box: 10001, Baghdad, Iraq

6 Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia (UKM), Bangi, P.O. Box 43000, Selangor, Malaysia

7 Al-Farahidi University, Baghdad 10001, Iraq

Abstract

Corrosion, the relentless foe plaguing industries exposed to hydrochloric acid solutions, threatens material integrity and equipment longevity. To triumph over this formidable adversary, the development of effective corrosion inhibitors is paramount. In this groundbreaking research, we delve into the untapped potential of 4-Acetamidoantipyrine as a corrosion inhibitor for safeguarding mild steel in hydrochloric acid solutions. Through rigorous experimentation, employing weight loss measurements, adsorption studies, and state-of-the-art computational analysis, we unlock the secrets of this remarkable inhibitor's inhibitory mechanisms. The results astoundingly reveal a pronounced decline in the corrosion rate of mild steel as the concentration of 4-acetamidoantipyrine intensifies. At an impressive concentration of 500 ppm, the inhibitor unleashes its full might, exhibiting an awe-inspiring maximum inhibition efficiency of 91.1 %. Further investigation uncovers the formation of a robust monolayer on the surface of mild steel, meticulously adhering to the revered Langmuir adsorption isotherm. Illuminating the binding mechanism, computational analysis highlights the intricate interaction between the inhibitor's nitrogen and oxygen atoms from the pyrazole and amide groups with the metal surface. These revelatory findings underscore the immense potential of 4-Acetamidoantipyrine as an unparalleled corrosion inhibitor, championing the protection of mild steel in the most aggressive hydrochloric acid environments. Moreover, they provide invaluable insights into the enigmatic inhibitory mechanisms employed by this remarkable compound. By shedding light on the captivating interactions and absorption behavior of 4-acetamidoantipyrine, this seminal study pioneers the advancement of corrosion inhibitors, paving the way for continued exploration and transformative breakthroughs in this captivating field.

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Main Subjects

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