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Electrochemical investigation of corrosion and corrosion inhibition of iron in hydrochloric acid solutions |
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| Authors: | KF Khaled SS Abdel-Rehim |
| Institution: | 1. Electrochemistry Research Laboratory, Ain Shams University, Faculty of Education, Chemistry Department, Roxy, Cairo, Egypt;2. Materials and Corrosion Laboratory, Taif University, Faculty of Science, Chemistry Department, Taif, Hawiya 888, Saudi Arabia;3. Ain Shams University, Faculty of Science, Chemistry Department, Abbassia, Cairo, Egypt |
| Abstract: | The inhibition effect of 1-methyl pyrazole (MPA) on the acidic corrosion of iron in 1.0 M HCl was studied at different concentrations (10?3–10?2 M) by potentiodynamic polarization and electrochemical impedance spectroscopy, and EIS measurements. It is found from the polarization studies that methyl pyrazole (MPA) behaves mainly as anodic inhibitor in HCl. Values of polarization resistance (Rp) and double layer capacitance (Cdl) in the absence and presence of MPA in 1.0 M HCl are determined. The adsorption of MPA on iron surface from HCl is found to obey Temkin adsorption isotherm. |
| Keywords: | Corrosion Inhibition Iron Hydrochloric acid 1-Methylpyrazole |
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