苦丁茶提取物对N80钢的缓蚀作用

摘要

采用傅里叶变换红外光谱、气相色谱-质谱、电化学阻抗谱、极化曲线和扫描电子显微镜研究了苦丁茶(KDC)提取物在含3.5％ NaCl(质量分数)和饱和CO2溶液中对N80钢的缓蚀作用.结果表明:苦丁茶提取物属于混合型缓蚀剂;该缓蚀剂对N80钢在含3.5％ NaCl和饱和CO2溶液中具有一定的缓蚀作用,能够有效抑制N80钢的腐蚀;缓蚀率随着缓蚀剂含量的增大而提高,当加入4％(体积分数)苦丁茶缓蚀剂时,根据极化曲线和电化学阻抗谱计算得到的缓蚀率分别达到了92.47％和96.90％.%The corrosion inhibition of kudingcha (KDC) extract for N80 steel in solution with 3.5％ (mass) NaCl and saturated CO2 was investigated by Fourier transform infrared spectroscopy (FTIR),gas chromatography-mass spectrometry (G-C-MS),electrochemical imPedance spectroscopy (E IS),polarization curve and scanning electron microscopy (SEM).The results show that the KDC extract was a mixed-type inhibitor.The KDC inhibitor had a certain corrosion inhibition for N80 steel in solution with 3.5 ％ NaCl and saturated CO2.The inhibition efficiency increased with the concentration of inhibitor.When the volume fraction of the inhibitor was 4％,the inhibition efficiency reached 92.47％ and 96.90％ calculated according to polarization curve and electrochemical impedance spectroscopy,respectively.