摘要
采用交流阻抗法和极化曲线法研究了溴代十六烷基吡啶(CPB)和硫脲(TU)在复配前后对X70钢在H2SO3溶液中的缓蚀作用.研究发现:H2SO3的浓度为10 mmol/L、pH=3.7的HAc-NaAc缓冲体系中,溴代十六烷基吡啶(CPB)与硫脲(TU)的缓蚀率随着浓度的增加而增加,溴代十六烷基吡啶(CPB)的浓度达到5×10-6kg/L时的缓蚀性能最佳,而硫脲(TU)的浓度达到50×10-6kg/L时的缓蚀性能最佳.复配实验结果表明:当缓蚀剂的总浓度为25×10-6kg/L,溴代十六烷基吡啶(CPB)和硫脲(TU)复配质量浓度比为1∶1时缓蚀效果最好.
The inhibitive action of cetylpyridinium bromide(CPB) and thiourea(TU) and the synergistic action of CPB and TU on the corrosion behavior of X70 steel were investigated in 10 mmol/L H_2SO_3 solution by means of potentiodynamic polarization techinique and EIS.It was found that the inhibitive effect of CPB and TU increased with the increase of concentration of CPB and TU respectively.The optimal concentration for CPB is 5×10^(-6) kg/L,but the optimal concentration for TU is 50×10^(-6) kg/L in HAc-NaAc (pH=3.7) solution with 10 mmol/L H_2SO_3.A combination of CPB and TU gives a synergistic effect and the optimal ratio with the total amount of 25×10^(-6) kg/L is 1∶1.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2005年第4期240-243,共4页
Corrosion Science and Protection Technology
基金
四川省科技厅应用基础研究重点项目(O4JY029-100)
关键词
溴代十六烷基吡啶
硫脲
协同缓蚀
X70钢
电化学阻抗谱
cetylpyridinium bromide
thiourea
synergistic effect of corrosion inhibition
X70steel
inhibition EIS
