H_2SO_4中聚乙二醇20000在钢表面的吸附及缓蚀作用  

Adsorption and inhibition effect of polyethylene glycol 20000 on steel in H_2SO_4 solution

作　　者：邓书端[1] 李向红[2] 孙金[1] 

机构地区：[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

出　　处：《清洗世界》2011年第4期10-14,共5页Cleaning World

基　　金：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)

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。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.

关 键 词：硫酸 钢 聚乙二醇20000 吸附 缓蚀 

分 类 号：TG174.42[金属学及工艺—金属表面处理]