| H2SO4中聚乙二醇20000在钢表面的吸附及缓蚀作用 |
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| 引用本文： | 邓书端,李向红,孙金.H2SO4中聚乙二醇20000在钢表面的吸附及缓蚀作用[J].化学清洗,2011(4):10-14. |
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| 作者姓名： | 邓书端 李向红 孙金 |
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| 作者单位： | [1]西南林业大学木质科学与装饰工程学院,云南昆明650224 [2]西南林业大学基础部,云南昆明650224 |
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| 基金项目： | 云南省教育厅自然科学研究基金项目（09C0181）,西南林业大学林产化工加工工程校级重点学科建设项目（XKX200907）. |
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| 摘 要： | 用失重法研究了在1.0mol/L H2SO4中20-50℃聚乙二醇20000（PEG-20000）在冷轧钢表面上的吸附及缓蚀作用。结果表明：PEG-20000对钢具有良好的缓蚀作用,缓蚀率随缓蚀剂浓度的增加而增大;但随温度的增加而增大。PEG-20000在钢表面的吸附符合Langmuir吸附模型。通过吸附热力学和动力学公式分别求出了相应的吸附热力学参数（吸附自由能ΔG,°吸附焓ΔH°,吸附熵ΔS°）和动力学参数表观活化能Ea,并根据这些吸附参数详细讨论了缓蚀作用机理。
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| 关 键 词： | 硫酸 钢 聚乙二醇20000 吸附 缓蚀 |
Adsorption and inhibition effect of polyethylene glycol 20000 on steel in H2SO4 solution |
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| Authors: | DENG Shuduan LI Xianghong SUN Jin |
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| Affiliation: | 1. Faculty of Wood Science and Decoration Technology, Southwest Forestry University, Kunming, Yunnan 650224, China ;2. Department of Fundamental Courses, Southwest Forestry University, Kunming, Yunnan 650224, China) |
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| Abstract: | The adsorption and inhibition effect of polyethylene glycol 20000 （PEG -20000 ） on cold rolled steel（CRS） in 1.0 mol/L H2 SO4 solution at 20 -50℃ was studied by weight loss method. The results show that PEG -20000 acts a good inhibitor in 1.0 moL/L H2SO4, and the inhibition efficiency increases with the inhibitor concentration, while decreases with the temperature. The adsorption of PEG- 20000 on CRS surface obeys the Langmuir adsorption isotherm equation. The experimental data have been treated with adsorption and kinetic equations. Three adsorption thermodynamic parameters （ adsorption free energy △G° , adsorption enthalpy △H° , adsorption entropy △S°） and kinetic parameter of apparent activation energy Eo are also calculated. The inhibitive mechanism is discussed in detail according to the parameters. |
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| Keywords: | Sulfuric acid Steel Polyethylene glycol 20000 Adsorption Inhibition |
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