HCl中吐温40在冷轧钢表面的缓蚀和吸附作用
Adsorption and Inhibition Effect of Tween40 on Cold Rolled Steel in HCl Solution
摘 要
用失重法研究了在1.0~8.0 mol/L盐酸溶液中非离子表面活性剂吐温40在冷轧钢表面的吸附及缓蚀作用.研究表明,虽然吐温40对冷轧钢的缓蚀随盐酸浓度和温度的增加有所下降,但吐温40是冷轧钢在1.0 mol/L盐酸溶液中的良好缓蚀剂,且用量较小,最大缓蚀率可达92.47%.通过吸附理论和试验数据得到了吸附热力学参数.结果表明,吐温40在钢表面的吸附符合Langmuir吸附模型,且吸附过程为放热伴随熵减少的自发过程.
盐酸
吐温40
吸附
缓蚀作用
steel
hydrochloric acid
tween-40
adsorption
corrosion inhibition
Abstract
The adsorption and inhibition effect of Tween40 on cold rolled steel (CRS) in 1.0~8.0 mol/L hydrochloric acid has been studied by weight loss method.The results showed that Tween40 was a good inhibitor in 1.0 mol/L HCl,and the maximum inhibition efficiency was 92.47% even when the inhibitor concentration was low.Inhibition efficiency decreased with the increase of hydrochloric acid concentration and temperature.The experimental data have been treated with adsorption theory,the thermodynamic parameters have been obtained.The thermodynamic results showed that the adsorption of Tween40 on the cold rolled steel surface obeyed the Langmuir adsorption isotherm equation.Furthermore,the adsorption process was a spontaneous and exothermic process accompanied by a decreasing entropy.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50761007);云南省自然科学基金项目(2006E008Q);云南省教育厅基金(06Y073A)
收稿日期 2009/3/10
修改稿日期 2009/4/7
网络出版日期
作者单位点击查看
联系人作者白玮(1b2w@sina.com)
备注白玮,副教授.
引用该论文: BAI Wei,LI Xiang-hong,DENG Shu-duan,KEN Sheng-ye,LI Lei. Adsorption and Inhibition Effect of Tween40 on Cold Rolled Steel in HCl Solution[J]. Corrosion & Protection, 2010, 31(2): 100～102
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参考文献
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