Experimental, quantum chemical and Monte Carlo simulation studies on the corrosion inhibition of some alkyl imidazolium ionic liquids containing tetrafluoroborate anion on mild steel in acidic medium

Corrosion inhibition of mild steel in 1M HCl by D-glucose derivatives of dihydropyrido [2,3-d:6,5-d′] dipyrimidine-2, 4, 6, 8(1H,3H, 5H,7H)-tetraone

“…The value of E HOMO energy which indicates electron donating ability of the inhibitor molecules, in our present case obeyed the order: GPH-3 > GPH-2 > GPH-1. It clearly indicates that GPH-3 molecule has strongest electron donating tendency while for the GPH-1 mentioned parameter is the smallest6869. The trend of values of E HOMO observed for studied inhibitor molecules well supports their experimentally measured inhibition efficiency.…”

“…In contrast to E HOMO , value of E LUMO is a measure of electron affinity of the inhibitor molecule6869. In our present case, values of E LUMO did not show any regular trends.…”

Corrosion inhibition potentiality of some benzimidazole derivatives for mild steel in hydrochloric acid: Electrochemical and weight loss studies

“…Nyquist plots for mild steel corrosion in 1 M HCl solution in the absence and presence of different concentrations (5·10 M) of the inhibitors PBD, BrBD and ClBD are given in Figure 3, respectively. The Nyquist plots show single semicircles for all systems over the frequency range studied, corresponding to one time constant [24][25][26]. The impedance spectra were analyzed by fitting to the equivalent circuit model shown in Figure 4, which has been used previously to adequately model the mild steel/acid interface [27,28], where R s is the solution resistance, R ct denotes the charge-transfer resistance and CPE is constant phase element.…”

Chitosan Schiff base as eco-friendly inhibitor for mild steel corrosion in 1 M HCl

“…This implies that the metal dissolution process is controlled by single transfer process that is unaffected by the addition of inhibitor molecules. [26,27] The increase in the diameter of the loop suggests that the MS corrosion is inhibited by forming a protective layer on the metal surface. The similar shape of Nyquist plot reveals that the corrosion mechanism is unaffected by the addition of chitosan Schiff base.…”