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2,4-二氨基嘧啶对冷轧钢在HCl溶液中的缓蚀作用
          
Corrosion Inhibition of 2,4-Diaminopyrimidine to Cold Rolled Steel in HCl Solution

摘    要
通过浸泡试验、电化学试验和扫描电子显微镜(SEM)观察研究了2,4-二氨基嘧啶(DAP)在1.0 mol/L HCl溶液中对冷轧钢的缓蚀作用。结果表明: DAP在HCl溶液中对冷轧钢具有良好的缓蚀作用; 缓蚀率随缓蚀剂含量的增大而增大,DAP浓度为10.0 mmol/L时缓蚀率最大,可达94.8%; DAP为混合型抑制型缓蚀剂,DAP在冷轧钢表面的吸附符合Langmuir吸附等温式,缓蚀率随温度的升高而下降。
标    签 冷轧钢   HCl溶液   2,4-二氨基嘧啶   缓蚀   吸附   cold rolled steel   HCl solution   2,4-diaminopyrimidine (DAP)   corrosion inhibition   adsorption  
 
Abstract
The corrosion inhibition of 2,4-diaminopyrimidine (DAP) to cold rolled steel (CRS) in 1.0 mol/L HCl solution was studied through immersion test, electrochemical test and scanning electron microscopy (SEM). The results show that DAP was a good inhibitor for CRS in HCl solution. The inhibition efficiency increased with the increase of the concentration of DAP, and the maximum inhibition efficiency could reach as high as 94.8% when the concentration of DAP was 10.0 mmol/L. DAP acted as a mixed-type inhibitor and the adsorption of DAP on the surface of cold rolled steel obeyed Langmuir adsorption isotherm. As the temperature rose, the inhibition efficiency decreased.

中图分类号 TG174.42   DOI 10.11973/fsyfh-201612001

 
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所属栏目 试验研究

基金项目 国家自然科学基金项目(51361027); 西南林业大学科研启动基金项目(111435); 云南省中青年学术和技术带头人后备人才项目(2015HB049)

收稿日期 2015/8/2

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备注李向红(1981-),副教授,博士,从事缓蚀剂研究

引用该论文: LI Xiang-hong,XIE Xiao-guang. Corrosion Inhibition of 2,4-Diaminopyrimidine to Cold Rolled Steel in HCl Solution[J]. Corrosion & Protection, 2016, 37(12): 949


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