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Citation: LIU Xia, ZHENG Yu-Gui. Inhibition Behavior of Two Imidazoline-Based Inhibitors with Different Hydrophilic Groups in Single Liquid Phase and Liquid/Particle Two-Phase Flow[J]. Acta Physico-Chimica Sinica, ;2009, 25(04): 713-718. doi: 10.3866/PKU.WHXB20090417 shu

Inhibition Behavior of Two Imidazoline-Based Inhibitors with Different Hydrophilic Groups in Single Liquid Phase and Liquid/Particle Two-Phase Flow

LIU Xia ,
ZHENG Yu-Gui ^,

1.
State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China; Department of Applied Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, P. R. China

Corresponding author: ZHENG Yu-Gui, ygzheng@imr.ac.cn
Received Date: 9 October 2008
Available Online: 23 February 2009

Two kinds of imidazoline inhibitors with different hydrophilic groups, i.e. hydroxyethyl imidazoline (HEI-11) and aminoethyl imidazoline (AEI-11), were used for resisting CO2 corrosion of N80 steel in single liquid phase and liquid/particle two-phase flow. Inhibition performance of these imidazoline inhibitors for CO2 corrosion of N80 in 3% (w) NaCl solution was investigated using polarization curve and electrochemical impedance spectroscopy under static and flow conditions. The results showed that the inhibition efficiency under both static and flow conditions increased according to the following: HEI-11>AEI-11. The inhibition performance of both inhibitors was severely degraded by single liquid phase and liquid/particle two-phase flowat5m·s-1. Additionally, quantumchemical calculation was carried out to correlate the inhibition performance of both inhibitors with their chemical structures and to explain the inhibition mechanism. The theoretical calculation was in od agreement with experimental results.
- Carbon dioxide corrosion,
- Corrosion inhibitor,
- Imidazoline,
- Liquid/particle two-phase flow,
- Quantum chemical calculation,
- Hydrophilic group
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