Imidazoline Gemini Surfactants as Corrosion Inhibitors for Carbon Steel X70 in NaCl Solution

Wenchang Zhuang; Xiqiu Wang; Wenyou Zhu; Yukun Zhang; Dan Sun; Rui Zhang; Chunyan Wu

doi:10.1021/acsomega.0c06103

Imidazoline Gemini Surfactants as Corrosion Inhibitors for Carbon Steel X70 in NaCl Solution

ACS Omega. 2021 Feb 19;6(8):5653-5660. doi: 10.1021/acsomega.0c06103. eCollection 2021 Mar 2.

Authors

Wenchang Zhuang¹, Xiqiu Wang^{1

2}, Wenyou Zhu¹, Yukun Zhang², Dan Sun¹, Rui Zhang¹, Chunyan Wu¹

Affiliations

¹ School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, P. R. China.
² College of Science, China University of Petroleum (East China), Qingdao 266580, P. R. China.

Abstract

The Gemini imidazoline surfactants were synthesized from a series of saturated fatty acids. Electrochemical impedance spectroscopy (EIS), polarization curve, and quantum chemistry methods were used to study the corrosion inhibition behavior of Gemini imidazoline surfactants for X70 carbon steel in NaCl solution. Results reveal that such kind of surfactants has an outstanding inhibition effect on carbon steel X70 in NaCl solution and that the restrained efficiency of Gemini imidazoline in an alkaline solution is better than that in a neutral solution. The shorter the carbon chain length, the higher the suppressive efficiency. The higher the concentration of Gemini imidazoline surfactant, the better the inhibition effect.