Y. E. Louadi, F. Abrigach, A. Bouyanzer
2017
Citations
1
Influential Citations
32
Citations
Journal
Portugaliae Electrochimica Acta
Abstract
The inhibition performance and mechanism of N ,N,N,N-tetrakis((3,5-dimethyl-1Hpyrazol-1-yl)methyl)propane-1,3-diamine (BF2) and N ,N,N,N-tetrakis((3,5-dimethyl-1H-pyrazol-1-yl)methyl) benzene-1,2-diamine (B F4) for the corrosion of mild steel in 1.0 M HCl were investigated using weight loss me thod and electrochemical measurements. The results show that both tetrakis p yrazole derivatives act as good inhibitors, and inhibition efficiency follows the o rder: BF4 > BF2. Two tetrakis pyrazole derivatives are mixed type inhibitors exhi biting predominantly cathodic behavior. The Nyquist plots showed that, after incr easing inhibitors’ concentrations, charge-transfer resistance increased and double-lay er capacitance decreased, involving increased inhibition efficiency. The adsorption of both inhibitors on a steel surface obeyed Langmuir model, thus, the thermodynamic and kinetic parameters were calculated and discussed. Quantum chemical paramete rs ar calculated using the Density Functional Theory method (DFT). Correlation between theoretical and experimental results is discussed.