Q235钢表面的超疏水吸附层形成与缓蚀研究

doi:10.11902/1005.4537.2021.296

中国腐蚀与防护学报

2022, Vol. 42

Issue (6): 903-912 DOI: 10.11902/1005.4537.2021.296

研究报告

本期目录 | 过刊浏览

Q235钢表面的超疏水吸附层形成与缓蚀研究

罗为平¹, 罗雪¹, 石悦婷¹, 王新潮¹^,², 张胜涛¹, 高放¹(

), 李红茹¹

1.重庆大学化学化工学院重庆 401331
2.菏泽学院药学院菏泽 274015

Preparation and Corrosion Inhibition of Super Hydrophobic Adsorption Film of Lotus Leaf Extract on Mild Steel

LUO Weiping¹, LUO Xue¹, SHI Yueting¹, WANG Xinchao¹^,², ZHANG Shengtao¹, GAO Fang¹(

), LI Hongru¹

1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
2. College of Pharmacy, Heze University, Heze 274015, China

引用本文:

罗为平, 罗雪, 石悦婷, 王新潮, 张胜涛, 高放, 李红茹. Q235钢表面的超疏水吸附层形成与缓蚀研究[J]. 中国腐蚀与防护学报, 2022, 42(6): 903-912.
Weiping LUO, Xue LUO, Yueting SHI, Xinchao WANG, Shengtao ZHANG, Fang GAO, Hongru LI. Preparation and Corrosion Inhibition of Super Hydrophobic Adsorption Film of Lotus Leaf Extract on Mild Steel[J]. Journal of Chinese Society for Corrosion and protection, 2022, 42(6): 903-912.

全文: PDF(5854 KB) HTML

摘要:

用新鲜荷叶作为研究对象,经过简便的乙醇回流萃取取得提取物。室温条件下,荷叶提取物能够在THF/HCl水溶液的混合溶液 (体积比为1/1,1.0 mol/L HCl溶液) 中产生聚集。傅立叶变换红外光谱以及X射线光电子能谱的结果证明了荷叶提取物在Q235钢样品表面发生化学作用,能够形成超疏水的吸附层。电化学结果表明荷叶提取物对碳钢在HCl溶液中具备良好的缓蚀性能,在0.4 g/L浓度下,最大缓蚀效率达到93.14%。

关键词 ：荷叶提取物, 碳钢, 缓蚀剂, 超疏水吸附层

Abstract：

In order to search for new green and low-cost organic corrosion inhibitors, the fresh lotus leave was selected as raw material, and then lotus leaf extract (LLE) was obtained by simple ethanol reflux extraction. The LLE could produce orderly aggregation material in a mixture of THF/HCl (tetrahydrofuran/HCl) solution (1.0 mol/L HCl solution) at room temperature. The results of Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) showed that the LLE underwent chemisorption on the surface of Q235 steel, and further the LLE could be adsorbed on the surface of mild steel, which formed super hydrophobic organic adsorption film. Electrochemical test results showed that lotus leaf extract had good corrosion inhibition performance for carbon steel in HCl solution. The maximal corrosion inhibition efficiency of LLE reached 93.14% for Q235 steel in HCl solution of 0.4 g/L.

Key words： lotus leaf extract carbon steel corrosion inhibitor super hydrophobic adsorption layer

收稿日期: 2021-10-21

ZTFLH:

TG174

基金资助:国家自然科学基金(21878029);国家自然科学基金(21676035);重庆市自然科学基金(cstc2018jcyjAX0668);山东省自然科学基金(ZR2020QB180)

作者简介: 罗为平,女,1998年生,硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2021.296 或 https://www.jcscp.org/CN/Y2022/V42/I6/903

图1 LLE在混合溶液中聚集一定时间后的SEM像

图2 LLE在混合溶液中聚集10 h的SEM像

图3 LLE的FT-IR谱及LLE聚集材料吸附在Q235钢表面的ATR-IR谱

图4 在1.0 mol/L HCl水溶液浸泡后Q235钢表面的Fe 2p3/2 XPS图谱

表1 空白以及吸附了LLE聚集材料的Q235钢在1.0 mol/L盐酸溶液浸泡后表面Fe 2p XPS分析结果

图5 Q235钢表面的C 1s XPS图谱

表2 空白以及吸附了LLE聚集材料的Q235钢表面C 1s的XPS分析结果

图6 吸附LLE聚集材料的Q235钢表面的N 1s XPS精细谱

表3 吸附了LLE聚集材料的Q235钢片表面N 1s的XPS分析结果

图7 不同表面处理状态的Q235钢在1 mol/L HCl溶液中浸泡6 h后的表面SEM形貌

图8 空白和吸附了不同浓度LLE的Q235钢在1 mol/L盐酸溶液中浸泡后的三维AFM图像

图9 Q235钢表面的接触角

图10 吸附了不同浓度LLE聚集材料的Q235钢电极在1 mol/L HCl溶液中的动电位极化曲线

表4 吸附了不同浓度LLE聚集材料的Q235钢电极在1 mol/L HCl溶液中的动电位极化曲线参数

图11 吸附了不同浓度LLE聚集材料的Q235钢电极在1 mol/L HCl溶液中的Nyquist和Bode图

图12 不同表面状态的钢电极的电化学阻抗谱拟合等效电路图

表5 吸附了不同浓度LLE聚集材料的Q235钢电极在1 mol/L HCl溶液中的电化学阻抗参数

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