阳离子碳氟、碳氢表面活性剂对Q235钢在HCl溶液中的缓蚀性能

Corrosion Inhibition Performance of Cationic Fluorocarbon and Hydrocarbon Surfactants for Carbon Steel in Hydrochloric Acid

氟碳表面活性剂在酸性介质中具有缓蚀作用,目前,对其作金属缓蚀剂的研究未见报道。研究了阳离子碳氟表面活性剂FCI-3和碳氢表面活性剂CTAB在1.0 mol/L HCl溶液中对Q235钢的缓蚀作用。通过静态失重法、极化曲线、电化学阻抗谱及扫描电镜对表面活性剂不同浓度时的缓蚀性能进行了对比研究。结果显示:FCI-3和CTAB表面活性剂对碳钢的缓蚀机理均属"几何覆盖效应"和混合型缓蚀剂,后者以抑制阳极反应为主,二者的缓蚀效率均随缓蚀剂浓度的增加而增大;FCI-3的缓蚀性能比CTAB的好。

The inhibition performance of fluorocarbon surfactant FCI- 3 and hydrocarbon surfactant cetyl trimethyl ammonium bromide(CTAB) for Q235 carbon steel in HC1 solution was studied.The inhibition performance of the surfactants at different concentrations in HC1 solution was investigated by using weight- loss method,polarization curve measurement,electrochemical impedance spectra measurement and scanning electron microscopic observation.Results indicated that both FCI-3 and CTAB surfactants belonged to mixed-type inhibitors,and they both functioned to inhibit the corrosion of the carbon steel by way of 'geometric covering effect'.The inhibition efficiency increased with increasing concentration of the inhibitors,and CTAB mainly inhibited anodic reaction.Moreover,FCI-3 exhibited better inhibition performance than CTAB.