J. Mater. Sci. Technol. ›› 2020, Vol. 43: 144-153.DOI: 10.1016/j.jmst.2020.01.025

• Research Article • Previous Articles     Next Articles

Evaluation of the inhibition behavior of carbon dots on carbon steel in HCl and NaCl solutions

Yuwei Ye*(), Zilong Jiang, Yangjun Zou, Hao Chen*(), Shengda Guo, Qiumin Yang, Liyong Chen   

  1. Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
  • Received:2019-06-21 Revised:2019-09-06 Accepted:2019-10-04 Published:2020-04-15 Online:2020-04-26
  • Contact: Ye Yuwei,Chen Hao

Abstract:

An eco-friendly and effective corrosion inhibitor (N-CDs) was acquired by hydrothermal method in methacrylic acid and ethyl(methyl)amine precursors. Afterwards, the weight loss and electrochemistry measurement were chosen to appraise the corrosion inhibition behavior of as-prepared N-CDs for Q235 steel in Cl- contained solutions. The change rules of EIS and Tafel data displayed that the as-prepared N-CDs revealed a high-efficiency protection for steel in all test environments. Meanwhile, the inhibition efficiency of steel reached up to 93.93 % (1 M HCl) and 88.96 % (3.5 wt% NaCl) at 200 mg/L of N-CDs. Furthermore, the N-CDs could form the adsorption film on steel surface to avoid the strong attack of Cl-. By analysis, the adsorption mechanism of as-prepared N-CDs on steel surface was physicochemical interaction, which strictly complied with the Langmuir adsorption model in both solutions.

Key words: Carbon dots, Adsorption film, Corrosion protection