INVESTIGATION OF CORROSION INHIBITOR ADSORPTION ON STAINLESS STEEL USING BENZALDEHYDE SEMI........

Weight loss measurements and scanning electron spectroscopy were used to investigate the effect of benzaldehyde semicarbazone on corrosion through stainless steel in 11 percent HCl. The effectiveness of benzaldehyde semicarbazone in inhibiting benzaldehyde was shown to vary with concentration, temperature, and immersion time. The efficiency of inhibition improves as the inhibitor concentration rises. In acid solutions, good inhibition efficiency (IE) was observed; in 11 percent HCl of the 0.04 inhibitor concentration at 45°C for 5 days, the inhibition efficiency was reported to be 81.56 percent. The Langmuir adsorption isotherm governs inhibitor adsorption on steel surfaces. Thermodynamic and kinetic parameters such as H°, S°, G°, and Ea are calculated to explain the mechanism of physical adsorption hypothesised from the inhibitory action of benzaldehyde semicarbazone. All of the experiments indicate a high level of agreement. At ideal conditions, scanning electron spectroscopy is utilised to examine the surface morphology of mild steel samples in the presence and absence of benzaldehyde semicarbazone. The creation of a smooth and dense protective layer on the surface of mild steel is revealed by scanning electron microscopy in the presence of benzaldehyde semicarbazone. The activation energy and free energy of adsorption values on the 304 stainless steel surface revealed chemisorption adsorption.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/6354