CO<sub>2</sub>体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应

引用本文: 张晨, 赵景茂. CO₂体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应[J]. 物理化学学报, 2014, 30(4): 677-685. doi: 10.3866/PKU.WHXB201402111 shu

Citation: ZHANG Chen, ZHAO Jing-Mao. Synergistic Inhibition Effect of Imidazoline Ammonium Salt and Sodium Dodecyl Sulfate in CO₂ System[J]. Acta Physico-Chimica Sinica, 2014, 30(4): 677-685. doi: 10.3866/PKU.WHXB201402111 shu

CO₂体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应

张晨 ^1, ,
赵景茂 ^1,2,

基金项目:
国家自然科学基金（51171013）资助项目

摘要:

采用失重法、电化学阻抗谱（EIS）、极化曲线、X射线光电子能谱仪（XPS）及扫描电子显微镜（SEM）研究了CO₂饱和的3.5%NaCl 腐蚀介质中，咪唑啉季铵盐（IAS）与十二烷基磺酸钠（SDSH）对Q235 钢的缓蚀协同效应. 结果表明，IAS与低浓度SDSH在腐蚀介质中具有较好的缓蚀协同效应，且当二者以1：1（50 mg·L^-1：50 mg·L^-1）的浓度比例复配时，协同效应最明显，缓蚀率为88.5%；而IAS 与高浓度SDSH间会产生拮抗效应. 本文通过建立合理的吸附模型，阐述了协同效应及拮抗效应的机理. SDSH与IAS 在Q235 钢表面的吸附过程均为放热的自发过程，前者符合Frumkin 吸附模型，后者符合Temkin 吸附模型. 单独使用较高浓度的SDSH对Q235钢也有较好的缓蚀作用，缓蚀率接近90%.

关键词:

English

Synergistic Inhibition Effect of Imidazoline Ammonium Salt and Sodium Dodecyl Sulfate in CO₂ System

ZHANG Chen ^1, ,
ZHAO Jing-Mao ^1,2,

1.
1 College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
2 Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing 100029, P. R. China
Received Date: 11 September 2013
Available Online: 31 March 2014
Fund Project:
国家自然科学基金（51171013）资助项目

Abstract:

The synergistic inhibition effect of the imidazoline ammonium salt (IAS) and sodium dodecyl sulfate (SDSH) on the corrosion of Q235 carbon steel in a CO₂ saturated brine solution was studied by weight loss, electrochemical impedance spectroscopy (EIS), Tafel polarization measurements, X-ray photoelectron spectrometry (XPS), and scanning electron microscopy (SEM). We found that in the CO₂ saturated brine solution, a od synergistic inhibition effect exists between IAS and low concentrations of SDSH, and the most significant synergistic inhibition occurred at a concentration ratio of 1:1 (50 mg·L^-1:50 mg·L^-1) with an inhibition efficiency of 88.5%. However, anta nism occurs upon mixing IAS with a high concentration of SDSH. In this paper, the mechanisms of the synergistic and anta nistic effects are analyzed using a reasonable adsorption model. od corrosion inhibition on Q235 carbon steel was also found when only using a high concentration of SDSH with an inhibition efficiency of about 90%. Both the adsorption processes of SDSH and IAS on the surface of Q235 carbon steel are spontaneous processes and the former process complies with the Frumkin adsorption model while the later complies with the Temkin adsorption model.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

CO₂体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应

English

Synergistic Inhibition Effect of Imidazoline Ammonium Salt and Sodium Dodecyl Sulfate in CO₂ System

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CO2体系中咪唑啉季铵盐与十二烷基磺酸钠之间的缓蚀协同效应

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Synergistic Inhibition Effect of Imidazoline Ammonium Salt and Sodium Dodecyl Sulfate in CO2 System

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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