Thermodynamic and Electrochemical Aspects of Green Corrosion Inhibitors in Acidic Media at Mild Steel Surfaces

Mild steel a low carbon steel is an affordable engineering material used for many purposes in various environments including mild acidic environment with some precautions. The corrosion behaviour of mild steel MS in 0.5 M H2SO4 and 0.5 M HCl, in the temperature range 303–323 K without and with the inhibitor N 3,4 dimethoxyphenyl methyleneamino 4 hydroxy benzamide DMHB , was investigated using Potentiodynamic polarization and Electrochemical impedance spectroscopy EIS techniques supplementing with surface characterization study using scanning electron microscope SEM and atomic force spectroscopy AFM . Experimental observations were found to be in agreement with Density functional theory DFT calculations. The inhibition efficiency increases with increase in DMHB concentration and showed maximum inhibition efficiency of 86 in 0.5 M H2SO4 and 81 in 0.5 M HCl, respectively, at concentration of 3 × 10 3 M at 303 K. The inhibition efficiency of DMHB obtained relatively at its lower concentration 3 × 10 3 M compared to other reported related compounds confirms its potential towards corrosion inhibition. Dr. Rakesh Kumar Dubey "Thermodynamic and Electrochemical Aspects of Green Corrosion Inhibitors in Acidic Media at Mild Steel Surfaces" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-4 , June 2022, URL: https://www.ijtsrd.com/papers/ijtsrd50128.pdf Paper URL: https://www.ijtsrd.com/chemistry/other/50128/thermodynamic-and-electrochemical-aspects-of-green-corrosion-inhibitors-in-acidic-media-at-mild-steel-surfaces/dr-rakesh-kumar-dubey