Inhibition effect of hexadecyl pyridinium bromide on the corrosion behavior of some austenitic stainless steels in H2SO4 solutions
| Autor: | M.M. Hamza, Magdy A. Ibrahim, S.S. Abd El Rehim |
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| Rok vydání: | 2013 |
| Předmět: |
Austenite
Chemistry(all) Hexadecyl pyridinium bromide Inhibitors Chemistry General Chemical Engineering Inorganic chemistry Cationic polymerization Impedance spectroscopy General Chemistry engineering.material Stainless steel Corrosion Dielectric spectroscopy Adsorption Pulmonary surfactant engineering Chemical Engineering(all) Austenitic stainless steel Polarization (electrochemistry) |
| Zdroj: | Arabian Journal of Chemistry. 6(4):413-422 |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2010.11.002 |
| Popis: | The inhibition effect of hexadecyl pyridinium bromide (HDPB) as a cationic surfactant on the corrosion behavior of some Egyptian austenitic stainless steel SS 304L, SS 316H and SS 304H in 0.5 M H 2 SO 4 solutions was investigated by using potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS). The results indicate that HDPB is a good inhibitor for the samples under investigation in 0.5 M H 2 SO 4 solutions. In addition, the inhibition efficiency η % increases with the inhibitor concentration while decreases with the increasing temperature referring to physical adsorption. The adsorption of the inhibitor obeys a Temkin adsorption isotherm. Polarization curves show that HDPB is a mixed inhibitor in H 2 SO 4 solutions. The results obtained from polarization and impedance measurements are in good agreement. Activation-free energies, enthalpies, and entropies for the inhibition process of HDPB were determined. |
| Databáze: | OpenAIRE |
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