Corrosion inhibition of eco-friendly nitrogen-doped carbon dots for carbon steel in acidic media: Performance and mechanism investigation

被引：71
作者：
Zhu, Mengyue [1 ]
He, Zhongyi [1 ]
Guo, Lei [2 ,3 ]
Zhang, Renhui [1 ]
Anadebe, Valentine Chikaodili [4 ]
Obot, Ime Bassey [5 ]
Zheng, Xingwen [6 ]
机构：
[1] East China Jiaotong Univ, Sch Mat Sci & Engn, Nanchang 330013, Jiangxi, Peoples R China
[2] Tongren Univ, Sch Mat & Chem Engn, Tongren 554300, Peoples R China
[3] Southwest Petr Univ, Sch Oil & Nat Gas Engn, Chengdu 610500, Peoples R China
[4] Alex Ekwueme Fed Univ Ndufu Alike, Dept Chem Engn, PMB1010, Abakaliki, Ebonyi State, Nigeria
[5] King Fahd Univ Petr & Minerals, Interdisciplinary Res Ctr Adv Mat, Dhahran 31261, Saudi Arabia
[6] Sichuan Univ Sci & Engn, Sch Chem & Environm Engn, Zigong 643000, Peoples R China
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2021年 / 342卷
基金：
中国国家自然科学基金;
关键词：
N-doped carbon dots; Carbon steel; Corrosion inhibition; Electrochemistry; Adsorption mechanism; MILD-STEEL;
D O I：
10.1016/j.molliq.2021.117583
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, nitrogen-doped carbon dots (NCDs) were obtained by hydrothermal method with citric acid and ethylenediamine as precursors. The corrosion inhibition performance and mechanism of prepared the NCDs on the Q235 carbon steel in 1 M HCl solution were evaluated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization curve, and surface analysis. The results that the NCDs exhibited 93% of inhibition efficiency at 100 mg/L. Electrochemical measurements demonstrated that the NCDs adsorbed on the metal surface and effectively inhibited the electron transfer process. The potentiodynamic polarization suggested that NCDs were excellent mix-type corrosion inhibition. Furthermore, NCDs successfully prevented the dissolution of anode metal and the evolution of cathode hydrogen ions. The adsorption of the NCDs followed Langmuir adsorption isotherm indicated physical and chemical adsorption. At the same time, the adsorption mechanism was analyzed, guiding the use of carbon dots as environment-friendly corrosion inhibitors in the future. (C) 2021 Elsevier B.V. All rights reserved.
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页数：10
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