1. Electrochemical and XPS studies of alkyl imidazoline on the corrosion inhibition of carbon steel in citric acid solution
- Author
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Hong Hua Ge, Yu Pei Shao, Shao Di Xu, Qiang Qiang Liao, Lu Lu Zhao, Song Hui Liu, and Dong Yang
- Subjects
chemistry.chemical_classification ,Materials science ,Carbon steel ,020209 energy ,General Chemical Engineering ,Inorganic chemistry ,Imidazoline receptor ,02 engineering and technology ,General Chemistry ,engineering.material ,021001 nanoscience & nanotechnology ,Electrochemistry ,Corrosion ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,chemistry ,0202 electrical engineering, electronic engineering, information engineering ,engineering ,General Materials Science ,0210 nano-technology ,Polarization (electrochemistry) ,Citric acid ,Alkyl - Abstract
The corrosion inhibition behavior of an imidazoline derivative, namely, 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline (UHCI) for carbon steel in 4 wt.% citric acid solutions was characterized by weight loss method and electrochemical techniques in conjunction with X-ray photoelectron spectrometer (XPS) technique. The inhibitor has a good anti-corrosion effect on the carbon steel in 4 wt.% citric acid solutions. The inhibition efficiency increases with UHCI concentrations from 0 up to 0.4 wt.%, yet declines a bit at 0.6 wt.% per contra with further augmentation of concentration. The inhibition efficiency declines with the rise of temperature from 20°C to 95°C, while it rises with the extension of soaking time from 2 h to 24 h. Two N1s peaks that appeared in XPS spectra give proof of UHCI inhibitor adsorbed on the carbon steel surface.
- Published
- 2016