Weight Loss, Thermodynamics, SEM, and Electrochemical Studies on N-2-Methylbenzylidene-4-antipyrineamine as an Inhibitor for Mild Steel Corrosion in Hydrochloric Acid

Abstract

The use of N-2-methylbenzylidene-4-antipyrineamine as an acid corrosion inhibitor for mild steel surfaces in hydrochloric acid is discussed in this article by means of weight loss, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) methods. The experimental findings exhibited that N-2-methylbenzylidene-4-antipyrineamine is a significant corrosion inhibitor for the mild steel in 1.0 M HCl solution and that its protection efficiency touches the peak at 5 × 10–4 M, exhibiting 91.8% for N-2-methylbenzylidene-4-antipyrineamine. The inhibitory efficiency increases as the inhibitor concentration rises and reduces as the temperature rises. Temperature has a significant impact on corrosion and blocking activities, which is extensively examined and explained. According to the gravimetric results, the examined inhibitor inhibits mild steel surface corrosion by providing a barrier at the metal–hydrochloric acid medium interface. Thermodynamic characteristics were combined with a quantum chemistry investigation using density functional theory to provide more insight into the inhibitory effect mechanism. The tested inhibitor adsorbs on the mild steel surface based on Langmuir’s adsorption isotherm method.

Temperature Effect on the Corrosion Inhibition of Carbon Steel by Polymeric Ionic Liquids in Acid Medium

“…It can be observed that the temperature produced an increase in V corr , even in the presence of PILs, which was attributed to desorption phenomena of the inhibiting macromolecules. In addition, it is shown that the lowest V corr values were obtained at C INH of 175 ppm, indicating that a higher amount of PIL macromolecules can form a more homogeneous protecting film that reduces the diffusion of sulfate ions toward the metallic surface [ 30 , 31 , 32 ].…”

Fabrication of nano calcium fluoride impregnated organic polyester alkyd coating for anticorrosive and antibacterial applications

“…The corrosion inhibition property of the prepared coating is examined using the acid immersion tests on the A36 steel by weight loss method 22,32 . The weight of bare steel and CaF 2 ‐impregnated alkyd resin‐coated steel is noted before and after immersing in acid and is summarized in Table 1.…”

A combined experimental and theoretical study of a novel corrosion inhibitor derived from thiophen

“…In the absence of inhibition, these plots reveal a single depressed capacitive semicircle. [ 58 ] Upon introducing the thiophen derivative, the impedance modulus of the system rises to its maximum, underlining the inhibitor's concentration‐dependent influence on the corrosion process. To interpret these results, we employed a comparable circuit model, as depicted in Figure 7b, [ 59 ] encompassing the solution resistance ($${R}_{{\rm{s}}}$$), charge transfer resistance governing the interfacial corrosion process ($${R}_{\mathrm{ct}}$$), and a constant phase angle element (CPE).…”