Eco friendly corrosion inhibitors: Inhibitive action of quinine for corrosion of low carbon steel in 1 m HCl |
| |
Authors: | Mohamed Ismail Awad |
| |
Affiliation: | (1) Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt |
| |
Abstract: | Quinine, a natural product, was investigated as a corrosion inhibitor for low carbon steel in 1.0 m HCl solution. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization were used to study the inhibition action in the temperature range 20–50 °C. The corrosion of steel was controlled by a charge transfer process at the prevailing conditions. The electrochemical results showed that quinine is an efficient inhibitor for low carbon steel and an efficiency up to 96% was obtained at 20 °C. The inhibition efficiency increases with inhibitor concentration and reaches a near constant value in the concentration range 0.48 mM and above. Application of the Langmuir adsorption isotherm enabled a study of the extent and the mode of adsorption. |
| |
Keywords: | adsorption corrosion inhibitors electrochemical impedance spectroscopy quinine steel |
本文献已被 SpringerLink 等数据库收录! |
|