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中国腐蚀与防护学报  2014, Vol. 34 Issue (4): 366-374    DOI: 10.11902/1005.4537.2013.139
  论文 本期目录 | 过刊浏览 |
O,O '-二(2-苯乙基) 二硫代磷酸二乙铵在HCl溶液中对Q235钢的缓蚀性研究
谢斌1, 2, 朱莎莎1, 李玉龙1, 赖川2, 林肖1, 邹立科1, 何林芯1, 陈能1
1. 四川理工学院功能材料研究所 材料腐蚀与防护四川省重点实验室; 绿色催化四川省高校重点实验室 自贡 643000; 2. 重庆大学化学化工学院 重庆 400044
Corrosion Inhibition Performance of Diethylammonium O,O '-Di(2-phenylethyl)dithiophosphate for Q235 Steel in HCl Solution
XIE Bin1, 2, ZHU Shasha1, LI Yulong1, LAI Chuan2, LIN Xiao1, ZOU Like1, HE Linxin1, CHEN Neng1
1. Institute of Functional Materials, Material Corrosion and Protection Key Laboratory of Sichuan Province, University Key Laboratory of Green Catalysis of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 643000, China; 2. College of Chemistry & Chemical Engineering, Chongqing University, Chongqing 400044, China
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摘要: 合成了一种新型缓蚀剂O,O '-二(2-苯乙基)二硫代磷酸二乙铵(EPP),并用元素分析和红外光谱对其进行了表征。采用静态失重法、极化曲线法和电化学阻抗法研究了EPP在HCl溶液中对Q235钢的缓蚀性能,探讨了其在Q235钢表面的吸附行为,考察了HCl浓度、腐蚀体系温度等因素对其缓蚀率的影响。结果表明:EPP是一种高效的混合型缓蚀剂,其缓蚀率随缓蚀剂浓度增加而增大,随腐蚀系统温度升高而缓慢减小。在30 ℃,1.0 molL-1的HCl溶液中,EPP浓度为60 mgL-1时,其缓蚀率高达98.48%。EPP在Q235钢表面的吸附符合Langmuir吸附等温式,属于自发进行的化学吸附。量子化学计算结果表明,EPP通过配位键和反馈键与金属Fe形成了多中心、稳定的化学吸附。
关键词 '-二(2-苯乙基) 二硫代磷酸二乙铵缓蚀剂Langmuir吸附等温式量子化学    
Abstract:A new corrosion inhibitor, diethylammonium O,O '-di(2-phenylethyl)dithiophosphate (EPP), was synthesized and characterized by elemental analysis and IR spectrum. Its inhibitive effect, adsorption behavior, and influence factors for Q235 steel in HCl solution were evaluated by weight loss measurement, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results showed that EPP was a mixed type inhibitor, the inhibitive efficiency increased gradually with the increase of inhibitor concentration, but decreased slowly with temperature of corrosion system. The inhibitive efficiency was up to 98.48% at the inhibitor concentration of 60 mgL-1 in 1.0 molL-1 HCl at 30 ℃. The adsorption of EPP on Q235 steel surface was consistent with the Langmuir adsorption isotherm and belonged to chemisorptions. The quantum chemical calculations showed that the coordination bond and back-donating bond could be easily formed between inhibitor molecules and metal Fe atoms, and thereby the multicenter, stable chemical adsorption could be formed.
Key wordsdiethylammonium    '-di(2-phenylethyl)dithiophosphate    corrosion inhibitor    langmuir adsorption isotherm    quantum chemistry
收稿日期: 2013-09-05     
ZTFLH:  O646.7  
基金资助:材料腐蚀与防护四川省重点实验室开放基金项目(2011CL03和2012CL12),四川省教育厅成果转化项目(13cz0019),绿色催化四川省高校重点实验室开放基金项目(LZJ1103和LZJ1203)及四川理工学院培育项目和研究生创新基金项目(2012PY14和y2012017)资助
通讯作者: 通讯作者:谢斌,E-mail:xiebinqhg@sina.com.cn     E-mail: xiebinqhg@sina.com.cn
作者简介: 谢斌,男,1965年生,教授,研究方向为有机合成和缓蚀剂

引用本文:

谢斌, 朱莎莎, 李玉龙, 赖川, 林肖, 邹立科, 何林芯, 陈能. O,O '-二(2-苯乙基) 二硫代磷酸二乙铵在HCl溶液中对Q235钢的缓蚀性研究[J]. 中国腐蚀与防护学报, 2014, 34(4): 366-374.
XIE Bin, ZHU Shasha, LI Yulong, LAI Chuan, LIN Xiao, ZOU Like, HE Linxin, CHEN Neng. Corrosion Inhibition Performance of Diethylammonium O,O '-Di(2-phenylethyl)dithiophosphate for Q235 Steel in HCl Solution. Journal of Chinese Society for Corrosion and protection, 2014, 34(4): 366-374.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2013.139      或      https://www.jcscp.org/CN/Y2014/V34/I4/366

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