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Citation: LI Xiao-Wei, GAO Yan-Min, LI Yan-Xi, HAN Xiao-Yu. Adsorption Behaviour of Glycine on Pre-corrosion A3 Steel[J]. Chinese Journal of Applied Chemistry, ;2009, 26(10): 1232-1235. shu

Adsorption Behaviour of Glycine on Pre-corrosion A3 Steel

1.
School of Material Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003

Corresponding author: GAO Yan-Min,
Received Date: 6 October 2008
Available Online: 25 November 2008
Fund Project: 江苏省研究生科研创新基金资助项目(CX07S_024z) (CX07S_024z)

The adsorption behavior of glycine(GLY) on the surface of FeCO₃ film and its inhibition mechanism in sodium bicarbonate solution were studied by polarization curves and electrochemical impedance spectrum(EIS). Results indicate that GLY forms multi-layer on the surface of pre-corrosion A3 steel and there is a desorption process. The inhibition mechanism is geometric blocking effect and inhibition effect is better at a concentration of 100 mg/L. The adsorption is spontaneous,and the Gibbs free energy is -27.408 kJ/mol at a low concentration of GLY,and is -13.152 kJ/mol at a high concentration of GLY.
- sodium bicarbonate,
- glycine,
- adsorption,
- corrosion film
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