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.
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 rnmol/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.
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