Novel water-soluble organoselenocyanates and symmetrical diselenides tethered N-succinanilate and N-maleanilate as corrosion inhibitors for reinforced steel in the simulated concrete pore solution

Abstract

The anti-corrosive accomplishment of novel water-soluble organoselenocyanates and symmetrical diselenides tethered N-succinanilate and N-maleanilate was evaluated for boosting steel (RF-steel) in 3.5 % sodium chloride saturated with slaked lime solution. The inhibition behavior of the organoselenium (OSe) derivatives was studied via surface examination, electrochemical measurements, and Monte Carlo (MC) simulations in addition to quantum chemical calculations. Additionally, the results of SEM and XPS confirmed the inhibitory action of the organoselenium (OSe) compounds on the RF-steel surface. The electrochemical findings (EIS and PDP) show that OSe molecules are robust RF-steel inhibitors in 3.5 % sodium chloride saturated with the slaked lime solution, and their effectiveness matched the following pattern: N-SuSeCN (86.86 %) < N-MSeCN (88.22 %) < N-SuSe2 (95.65 %) < N-MSe2 (97.54 %). Quantum computations were used to evaluate the examined OSe molecules' propensity to suppress corrosion. At the same time, MC simulations were used to estimate the interaction energy between the OSe derivatives and the metal surface. The outcomes of several techniques are then used to fully understand the adsorption mode of inhibitors and the corrosion mechanism. The theoretical research results support the practical studies with good OSe derivatives inhibitory efficacy. The OSe compounds could potentially improve the corrosion protection of reinforced steel in the simulated concrete pore.