氮掺杂对碳纳米颗粒缓蚀性能的影响

doi:10.11902/1005.4537.2021.001

中国腐蚀与防护学报

2022, Vol. 42

Issue (1): 85-92 DOI: 10.11902/1005.4537.2021.001

研究报告

本期目录 | 过刊浏览

氮掺杂对碳纳米颗粒缓蚀性能的影响

王晶, 王斯琰, 张崇, 王文涛, 曹星, 樊宁, 徐宏妍(

)

中北大学材料科学与工程学院太原 030051

Effect of Nitrogen Doping on Corrosion Inhibition Performance of Carbon Nanoparticles

WANG Jing, WANG Siyan, ZHANG Chong, WANG Wentao, CAO Xing, FAN Ning, XU Hongyan(

)

School of Materials Science and Engineering, North University of China, Taiyuan 030051, China

全文: PDF(5840 KB) HTML

摘要:

通过热分解方法，以柠檬酸为碳源制备出无氮碳纳米颗粒 (CNPs)；以柠檬酸为碳源、尿素为氮源制备出氮掺杂碳纳米颗粒 (N-CNPs)。采用原子力显微镜、红外光谱和Raman光谱表征碳纳米颗粒的结构，利用失重实验、电化学测试、激光共聚焦扫描显微镜观察等研究碳纳米颗粒在1 mol/L HCl溶液中对Q235钢缓蚀性能。结果表明：两种碳纳米颗粒均属于混合型缓蚀剂，50 mg/L CNPs的缓蚀效率为37.6%；而N-CNPs的缓蚀效率明显提高，达到90.96%。

关键词 ：碳纳米颗粒, 缓蚀剂, 电化学, Q235钢

Abstract：

Nitrogen-free carbon nanoparticles (CNPs) were prepared by thermal decomposition method with citric acid as carbon source. While nitrogen-doped carbon nanoparticles (N-CNPs) were prepared by thermal decomposition method with citric acid as carbon source and urea as nitrogen source. The above nano-particles were characterized by means of atomic force microscope, infrared spectroscope and Raman spectroscope, and their corrosion inhibition performance for Q235 steel in 1 mol/L HCl solution was comparatively studied by mass loss method, electrochemical means and laser confocal scanning microscope. The results showed that the two carbon nanoparticles belonged to mixed-type corrosion inhibitors, the corrosion inhibition efficiency of N-free carbon nanoparticles was 37.5%, and the corrosion inhibition efficiency of the carbon nanoparticles was significantly improved after being doped with N. The corrosion inhibition efficiency of N-CNPs reached 90.96%.

Key words： carbon nanoparticle corrosion inhibitor electrochemical Q235 steel

收稿日期: 2021-01-04

ZTFLH:

TG174.42

基金资助:山西省自然科学基金(201901D111175)

通讯作者: 徐宏妍 E-mail: xuhongyan@nuc.edu.cn

Corresponding author: XU Hongyan E-mail: xuhongyan@nuc.edu.cn

作者简介: 王晶，女，1996年生，硕士生

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引用本文:

王晶, 王斯琰, 张崇, 王文涛, 曹星, 樊宁, 徐宏妍. 氮掺杂对碳纳米颗粒缓蚀性能的影响[J]. 中国腐蚀与防护学报, 2022, 42(1): 85-92.
Jing WANG, Siyan WANG, Chong ZHANG, Wentao WANG, Xing CAO, Ning FAN, Hongyan XU. Effect of Nitrogen Doping on Corrosion Inhibition Performance of Carbon Nanoparticles. Journal of Chinese Society for Corrosion and protection, 2022, 42(1): 85-92.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.001 或 https://www.jcscp.org/CN/Y2022/V42/I1/85

图1 CNPs和N-CNPs的AFM二维图和高度图

图2 CNPs和N-CNPs的FT-IR谱

图3 N-CNPs的Raman谱

图4 Q235钢在含CNPs和N-CNPs的1 mol/L 盐酸溶液中的腐蚀速率和缓蚀效率

表1 N-CNPs与已报道的缓蚀剂对Q235钢在1 mol/L盐酸溶液中缓蚀效率的比较

图5 Q235钢在3种溶液中的动电位极化曲线及其对应的Evans极化图

表2 Q235钢在3种溶液中的极化曲线拟合参数

图6 Q235钢在3种溶液中的电化学阻抗谱及等效电路图

图7 Q235钢浸入未添加和添加缓蚀剂的1 mol/L盐酸溶液中24 h后的LSCM图像

Concentration / mg·L^-1	L₁ / H	R_s / Ω·cm²	Q_dl / F·cm^-2	n₁	R_ct / Ω·cm²	L₂ / H	R_L / Ω·cm²	χ²	Inhibition efficiency
1 mol/L HCl	7.934 $×$ 10^-7	1.861	8.095 $×$ 10^-4	0.914	85.2	---	---	2.87 $×$ 10^-4	---
50 mg/L CNPs	6.652 $×$ 10^-7	1.731	2.341 $×$ 10^-4	0.902	202.8	139.3	15.95	4.09 $×$ 10^-4	56.5%
50 mg/L N-CNPs	6.409 $×$ 10^-7	1.700	8.974 $×$ 10^-5	0.888	660.3	300.2	30.3	6.43 $×$ 10^-4	87.10%

表3 Q235钢在3种溶液中的电化学阻抗谱拟合参数

图8 Q235钢在含CNPs和N-CNPs的1 mol/L盐酸溶液中的Langmuir吸附等温线

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