Two novel triazine-based quaternary ammonium salt Gemini surfactants as potential corrosion inhibitors for carbon steel in a sulfate-reducing bacteria solution: Experimental and theoretical studies
Guofang Gao,
Junxia Wang,
Penghui Liang,
Yilei Ruan,
Dehua Wang,
Li Feng,
Xuemei Ma,
Zhiyong Hu,
Hailin Zhu
Affiliations
Guofang Gao
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Junxia Wang
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Penghui Liang
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Yilei Ruan
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Dehua Wang
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Li Feng
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Xuemei Ma
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Zhiyong Hu
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China
Hailin Zhu
School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China; Shanxi Key Laboratory of Functional Surfactants, Taiyuan, 030001, Shanxi, China; Corresponding author. School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, Shanxi, China.
In this paper, two triazine ring–containing quaternary ammonium salt Gemini surfactants (C12-2-C12 and C14-2-C14) were synthesized. The minimum inhibitory concentrations against sulfate-reducing bacteria (SRB) of C12-2-C12, C14-2-C14 and dodecyl dimethyl benzyl ammonium chloride (1227) were determined using the double-dilution method. The performance of C12-2-C12 and C14-2-C14 in inhibiting carbon steel corrosion in the presence of SRB was examined, with 1227 serving as a control sample. The corrosion inhibition properties were assessed through static weight loss, electrochemical testing, and surface analysis. The interface adsorption behaviour of the corrosion inhibitor was explored via molecular dynamics simulations. Results indicate that the minimum inhibitory concentrations (MIC) of C12-2-C12 (0.021 mM) and C14-2-C14 (0.005 mM) are lower than that of 1227 (0.300 mM). The results of static weightlessness measurement reveal that the corrosion inhibition effects of the three surfactants on carbon steel soaked in SRB solution follow the order of C14-2-C14 > C12-2-C12 > 1227, with inhibition rates of 93.23 %, 88.45 %, and 76.49 % at a concentration of 0.2 mM, respectively. The adsorption behavior of these surfactants (1227, C12-2-C12, and C14-2-C14) on carbon steel surface in the presence of SRB conforms the Langmuir isotherm adsorption model. The outcomes of electrochemical experiments align with the static weight loss data. Furthermore, surface analysis results suggest that the surfactants can adsorb onto the carbon steel surface to form a protective film, thereby inhibiting SRB-induced corrosion.
