Search

benzo[d]thiazol-2-ol (BAT), benzo[d]thiazol-2-amine (4-BAT) and benzo[d]thiazol-2-thiol (2-BAT) were prepared and investigated as corrosion inhibitors for AISI 1035 steel in 1 M HCl. It is found that 4-BAT functions as more effective inhibitor than other inhibitors. Computational chemistry studies show that derivatives can adsorb on the steel surface by sharing the lone pair electrons of N atoms with iron atoms or by accepting electrons from iron surfaces. Due to its strong interaction with the steel surface in aqueous system, the pyridine segment should be responsible for the higher inhibition efficiency of 4-BAT., Moroccan Journal of Chemistry, Vol. 7, No 1 (2019)

WOS: 000472524800010, Inhibition performances of imidazoline derivatives with different alkyl chain length for carbon steel in H2S acid solutions has been studied by polarization curves, AC impedance measurements, current transient, Atomic Force Microscopy (AFM) and Density functional theory (DFT) techniques. Results showed that the inhibition occurs through adsorption of the inhibitors molecules on the metal surface. The inhibition efficiency was found to increase with increasing inhibitor's concentration. Polarization data indicated that this compounds act as mixed-type inhibitors. Computational studies of investigated inhibitors were performed by using Harfree-Fock (HF) and M062X methods which are ab-initio and DFT methods with 6-31G basis set in gas phase and water. Calculated results indicate that the inferred inhibition efficiency increases with the increasing alkyl chain length, which is well in accordance with reported experimental results., Iranian Offshore Oil Company (IOOC) of National Iranian Oil Company (NIOC), The authors would like to acknowledge to their corresponding universities. We are grateful to the Iranian Offshore Oil Company (IOOC) of National Iranian Oil Company (NIOC) for financial supports.

WOS: 000471282200005, Benzo[d]thiazol-2-ol (BAT), benzo[d]thiazol-2-amine (4-BAT) and benzo[d]thiazol-2-thiol (2-BAT) were prepared and evaluated as corrosion inhibitors for AISI 1035 steel in 1 M HCl. It is found that 4-BAT functions as more effective inhibitor than other inhibitors. Computational chemistry studies show that derivatives can adsorb on the steel surface by sharing the lone pair electrons of N atoms with iron atoms or by accepting electrons from iron surfaces. Due to its strong interaction with the steel surface in aqueous system, the pyridine segment should be responsible for the higher inhibition efficiency of 4-BAT.

WOS: 000374322200016, The role of Sulfur containing compounds namely: Thiobarbituric acid (TBA) and Thiourea (TH) as corrosion inhibitors for mild steel in 1 M HCl has been studied using potentiodynamic anodic polarization, electrochemical impedance spectroscopy, atomic force microscopy and scanning electron microscopy techniques. Polarization results showed that all the compounds studied are mixed type inhibitors. Electrochemical impedance studies showed that the presence of these compounds decreases the double-layer capacitance and increases the charge transfer resistance. Quantum chemical calculation was further applied to reveal the adsorption structure and explain the experimental results. The results of calculations showed superior inhibition efficiency of TH in comparison to TBA., Office of Vice Chancellor of Research of their corresponding universities; office of scientific research projects of Cumhuriyet University [F-372], The authors wish to acknowledge the financial support of the Office of Vice Chancellor of Research of their corresponding universities. We are grateful to the office of scientific research projects of Cumhuriyet University (Project No.: F-372) for financial supports. The numerical calculations reported in this paper are performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA Resources).

WOS: 000388046800051, 2-Amino-1,3,4-triazole (AT), 3-(2-pyridyl)-2-Amino-1,3,4-triazole (2 -AT) and 3-(4-pyridyl)-2-Amino1,3,4-triazole (4 -AT) have been investigated as inhibitors for corrosion of carbon steel in 1 M hydrochloric acid. For this purpose; weight loss, potentiodynamic polarization, AC impedance measurements, current transient techniques were utilized. Polarization curves reveal that three compounds are mixed type inhibitors and inhibition efficiency increases with increasing concentration of compounds. Further, the 4-AT, displayed the best inhibiting characteristics for this system, with a maximum IE of approximately 93% having added only 2 x 10(-3) M. Specimen surfaces were characterized using optical microscope. Calculations of related inhibitors are performed by using HF, MP2 and B3LYP methods with 6-311+G(2d,p) basis sets. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

WOS: 000378452700036, The inhibition ability of N,N'-bis(4-formylphenol)-1,2-Diaminocyclohexane (4-HCD) on the carbon steel in 1 M hydrochloric acid solution was studied by electrochemical techniques and weight loss measurements. 4-HCD inhibited steel corrosion in I M HCI solution significantly and the inhibition efficiency increased with 4-HCD concentration. The results indicated that after 5 h, this inhibitor has a maximum percentage inhibition efficiency of approximately 71% in the presence of 2 mM inhibitor. The adsorption of the inhibitor was followed Langmuir adsorption isotherm with the standard adsorption free energy of -25.66 kJ mol(-1). Computational investigations of the studied inhibitor are performed by using HF method with 6-31++G(d,p) and 6-311++G(d,p) basis sets. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved., Office of Vice Chancellor of Research; office of scientific research projects of Cumhuriyet University [F-429], The authors wish to acknowledge the financial support of the Office of Vice Chancellor of Research of their corresponding universities. We are grateful the office of scientific research projects of Cumhuriyet University (Project No.: F-429) for financial supports. The numerical calculations reported in this paper are performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA Resources).

WOS: 000365056900023, The inhibition ability of 4-[bis[4-(dimethylamino)phenyllmethyl]-N,N-dimethylaniline (Mv10B) on carbon steel in 1 M HCl solution was studied by electrochemical techniques. Mv10B inhibited carbon steel corrosion in 1 M HCl solution significantly and the inhibition efficiency increased with Mv10B concentration. Potentiodynamic polarization results showed that Mv10B was a mixed-type inhibitor. The adsorption of Mv10B on steel surface followed Langmuir adsorption isotherm. The inhibition performance of Mv10B was also evidenced by AFM images. Computational investigations of studied inhibitor are performed by using HF method with 6-31++G(d,p) and 6-311++G(d,p) basis sets. (C) 2015 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers.