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中国腐蚀与防护学报  2018, Vol. 38 Issue (3): 303-308    DOI: 10.11902/1005.4537.2017.098
  研究报告 本期目录 | 过刊浏览 |
生物基缓蚀剂糠醇缩水甘油醚的缓蚀性能及机理
彭晚军1,2, 丁纪恒1, 陈浩1,3, 余海斌1()
1 中国科学院宁波材料技术与工程研究所 中国科学院海洋新材料与应用技术重点实验室 浙江省海洋材料与防护技术重点实验室 宁波 315201
2 湖南大学材料科学与工程学院 长沙 410006
3 宁波大学材料科学与化学工程学院 宁波 315201
Corrosion Inhibition of Bio-based Inhibitor Furfuryl Glycidyl Ether
Wanjun PENG1,2, Jiheng DING1, Hao CHEN1,3, Haibin YU1()
1 Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Key Laboratory of Marine New Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
2 College of Materials Science and Engineering, Hunan University, Changsha 410006, China
3 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315201, China
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摘要: 

在生物基呋喃类缓蚀剂的研究基础上,利用Tafel极化曲线和电化学阻抗技术 (EIS) 研究了Q235碳钢在不同浓度的糠醇缩水甘油醚 (FGE) 盐酸溶液中的腐蚀行为,并通过静态失重实验分析了Q235碳钢在不同体系中的腐蚀速率。结果表明,4.92×10-4 molL-1的FGE对Q235碳钢具有最好的缓蚀效果,其缓蚀效率达到94.0%,腐蚀速率为0.076 mgcm-2h-1。此外,经证明FGE在Q235碳钢表面的吸附过程符合Langmuir吸附模型,同时发生物理吸附和化学吸附。
关键词 ： 生物基,  呋喃类缓蚀剂,  FGE,  Q235碳钢,  Langmuir吸附模型    
Abstract：

On the basis of previous studies on bio-based furan inhibitors, the corrosion behavior of Q235 carbon steel in different concentration of hydrochloric acid solutions with FGE was studied by means of corrosion weight-loss measurement, Tafel polarization curve measurement and electrochemical impedance spectroscopy (EIS). Results show that when the concentration of FGE is 4.92×10-4 molL-1, the inhibition effect for Q235 carbon steel achieves the optimum with the inhibition efficiency of more than 94.0% and the corrosion rate of 0.076 mgcm-2h-1. In addition, it is proved that the adsorption process of FGE on Q235 carbon steel is in accord with the Langmuir adsorption model, which is the result of the interaction of physical adsorption and chemical adsorption.
Key words： Bio-based    Furan inhibitor    FGE    Q235 carbon steel    Langmuir adsorption model
收稿日期: 2017-06-28     
ZTFLH:  TG174.4  
基金资助:中国博士后科学基金 (2015A610048)
作者简介:

作者简介 彭晚军,男,1993年生,硕士生
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引用本文:

彭晚军, 丁纪恒, 陈浩, 余海斌. 生物基缓蚀剂糠醇缩水甘油醚的缓蚀性能及机理[J]. 中国腐蚀与防护学报, 2018, 38(3): 303-308.
Wanjun PENG, Jiheng DING, Hao CHEN, Haibin YU. Corrosion Inhibition of Bio-based Inhibitor Furfuryl Glycidyl Ether. Journal of Chinese Society for Corrosion and protection, 2018, 38(3): 303-308.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.098      或      https://www.jcscp.org/CN/Y2018/V38/I3/303

图1  电化学工作站三电极实验系统
图2  Q235碳钢在含不同浓度FGE缓蚀剂的0.5 mol/L盐酸溶液中浸泡3 h的极化曲线
FGE mol·L-1 -EcorrmV βaV·dec-1 -βcV·dec-1 IcorrμA·cm-2 RpΩ·cm-2
0 543 12.46 10.13 112.40 171
1.64×10-4 536 10.56 7.18 26.43 927
3.28×10-4 553 6.78 4.30 16.98 2312
4.92×10-4 564 7.80 5.04 11.74 2883
6.56×10-4 545 8.12 4.99 19.83 1672
表1  极化曲线拟合后的电化学参数
图3  Q235碳钢在含不同浓度FGE的0.5 mol/L盐酸溶液中浸泡3 h的电化学阻抗谱和等效电路图
FGEmol·L-1 RsΩ·cm2 QdlμF·cm2·Hz1-n n RctΩ·cm2 PE%
0 3.27 1.45×10-4 0.81 1.33×102 ---
1.64×10-4 4.71 4.20×10-5 0.76 9.26×102 81.6
3.28×10-4 5.13 3.20×10-5 0.60 1.84×103 92.7
4.92×10-4 3.35 1.50×10-5 0.63 2.22×103 94.0
6.56×10-4 3.34 3.40×10-5 0.72 1.57×103 91.5
表2  EIS拟合后的电化学参数
FGE / mol·L-1 V / mg·cm-2·h-1 θ CR / %
0 1.164 --- ---
1.64×10-4 0.201 0.827 82.7
3.28×10-4 0.076 0.935 93.5
4.92×10-4 0.043 0.963 96.3
6.56×10-4 0.093 0.920 92.0
表3  Q235碳钢在含不同浓度FGE的0.5 mol/L盐酸溶液中的失重实验结果
图4  Q235碳钢在含4.92×10-4 mol/L的FGE和空白盐酸溶液中浸泡3 h后的SEM像
C / molL-1 Kads / L·mol-1 ΔG 0ads / kJ·mol-1
0 --- ---
1.64×10-4 2.91×104 -3.54×104
3.28×10-4 4.39×104 -3.64×104
4.92×10-4 5.29×104 -3.69×104
6.56×10-4 1.75×104 -2.82×104
表4  FGE在碳钢表面的吸附参数
图5  FGE的Langmuir吸附等温线和FGE在碳钢表面的吸附机理示意图
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