期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2012
卷号：1
期号：5
页码：14-21
语种：English
出版社：International Science Community Association
摘要：An aqueous extract of asafoetida has been used as a corrosion inhibitor in controlling corrosion of carbon steel. The main constituent of this extract is umbelliferone. It has excellent inhibition efficiency (IE) of 98% at Zn2+ (25 ppm) by the weight loss method. The protective film has been analyzed using Atomic Force Microscopic (AFM) and FTIR spectroscopic techniques. Protective film formed on the metal surface is confirmed by using Electro chemical studies such as potentiodynamic polarization technique. Polarization study reveals that this system functions as mixed type of inhibitor.
关键词：Carbon steel;inhibition efficiency;umbelliferone;AFM;green inhibitors;protective film
