Structure of a novel Benzyl Quinolinium Chloride derivative and its effective corrosion inhibition in 15 wt.% hydrochloric acid

By Zhen Yang and Fengtao Zhan and Yuan Pan and Zhifeng LYu and Chengyou Han and YiPeng Hu and Pengpeng Ding and Tonghai Gao and Xinyuan Zhou and Yingnan Jiang
Published in Corrosion Science NULL 2015

Abstract

A novel quaternary ammonium (BQD) with good inhibitive performance is separated from the synthesis of N-Benzylquinolinium Chloride (BQC). The formula of \BQD\ was \C32H23N2Cl\ and its structure is characterized by NMR, LC-HRMS, FT-IR. The formation mechanism of \BQD\ is proposed. The corrosive inhibition of \BQD\ is investigated in 15% HCl. The corrosion rate is 1.98 g m?2 h?1 when the concentration of \BQD\ is 0.744 mmol L?1. The adsorption of \BQD\ on the steel obeyed Langmuir adsorption isotherm. The standard free energy of adsorption of \BQD\ is ?54.48 kJ mol?1, indicating a strong chemisorption of \BQD\ onto the steel.

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