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.
Highlights
Mild steel is corroded in everyday situations
1, a significant improvement in the substrate impedance was recognized with the addition of the N-2-methylbenzylidene-4antipyrineamine concentration hydrochloric acid environment
44 of spectra in the presencewas of N-2-methylbenzylidene-4-antipyrineamine with the Nyquist plots substrate impedance recognized with the addition of the N-2-methylbenzylidene-4had two loops: the first one in the HF field and the second one at an MF
Summary
Mild steel is corroded in everyday situations. Acid solutions, hydrochloric acid, are typically very aggressive media for mild steel corrosion. Inhibitors are among the most practical ways to prevent mild metal from corrosion, in acid conditions. The use of inhibitors has resulted in a decreased rate of iron dissolution and a significant increase in thethe lifelife of mild steel [5]. Inorganic compounds or their interface are all factors that influence adsorption [6] Inorganic compounds or their mixtures, mixtures, including such phosphates, chromate, nitrite, and the salts of zinc, silicates, cadincluding such phosphates, chromate, nitrite, and the salts of zinc, silicates, cadmium, mium, and arsenic have already been proved to be efficient as corrosion inhibitors for the and arsenic have already been proved to be efficient as corrosion inhibitors for the mild mild in steel the metal industries a long.
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