Effect of 3-Nitroacetophenone on Corrosion Inhibition of Mild Steel in Acidic Medium

• Published in: International journal of photoenergy 2022-02, Vol.2022, p.1-9
• Main Authors: Ibrahim, Sani, Sanmugapriya, R., Selvi, J. Arockia, Malini, T. Pushpa, Kamaraj, P., Vivekanand, P. A., Periyasami, Govindasami, Aldalbahi, Ali, Perumal, Karthikeyan, Madhavan, J., Khanal, Santosh
• Format: Article
• Language: English
• Subjects: Acetophenone; Adsorption; Contact angle; Corrosion effects; Corrosion inhibitors; Corrosion potential; Density functional theory; Efficiency; Electrodes; Low carbon steels; Molecular structure; Quantum chemistry; Scanning electron microscopy; Spectrum analysis; Surface chemistry; Weight loss measurement
• ISSN: 1110-662X; 1687-529X
• DOI: 10.1155/2022/7276670

Acetophenone derivatives are eco-friendly corrosion inhibitors to prevent corrosion of mild steel (MS) in acidic medium. In this work, the inhibition effect of 3-nitroacetophenone (3-NA) on the corrosion of MS in acidic medium (1 N HCl) was investigated using weight loss measurements, electrochemical measurements, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and quantum chemistry analysis. The studies were performed using different concentrations of inhibitors and at different temperatures. The results indicated that the inhibition efficiency of 3-NA increases with an increase in inhibitor concentration and reaches to a maximum of 64% at inhibitor concentration of 250 ppm at 30°C. The potentiodynamic polarization measurement indicated that 3-NA acts as mixed category of interdict. The adsorption of 3-NA on MS surface followed the Langmuir adsorption isotherm. The mode of adsorption of 3-NA on MS surface was further studied by quantum chemical calculations based on density functional theory (DFT). The results plainly revealed that 3-NA performs fairly as corrosion interdict for MS in acidic medium.