Sherif El-Sayed M, Abdo Hany S, Abedin Sherif Zein El
Deanship of Scientific Research (DSR), Center of Excellence for Research in Engineering Materials (CEREM), Advanced Manufacturing Institute (AMI), King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia.
Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, El Bohouth St. 33, Dokki, Giza 12622, Egypt.
Materials (Basel). 2015 Jun 26;8(7):3883-3895. doi: 10.3390/ma8073883.
In this paper we report on the corrosion inhibition of cast iron in Arabian Gulf seawater by two different ionic liquids namely, 1-ethyl-3-methylimidazolium chloride ([EMIm]Cl) and 1-butyl-1-methylpyrrolidinium chloride ([Py]Cl). The inhibiting influence of the employed ionic liquids was investigated by weight loss, open circuit potential electrochemical impedance spectroscopy, and cyclic potentiodynamic polarization. The results show the corrosion inhibition impact of the employed ionic liquids (ILs). Compared with [Py]Cl, [EMIm]Cl shows a higher inhibition efficiency at a short immersion time, for the examined ILs concentrations. However, [Py]Cl exhibits a higher efficiency upon increasing the immersion time indicating the persistence of the inhibiting influence. The corrosion inhibition of the employed ionic liquids is attributed to the adsorption of the cations of the ionic liquids onto the surface of cast iron forming a corrosion barrier.
在本文中，我们报道了两种不同的离子液体，即1-乙基-3-甲基咪唑氯盐（[EMIm]Cl）和1-丁基-1-甲基吡咯烷氯盐（[Py]Cl）对阿拉伯湾海水中铸铁的缓蚀作用。通过失重法、开路电位、电化学阻抗谱和循环动电位极化法研究了所用离子液体的抑制作用。结果表明了所用离子液体（ILs）的缓蚀效果。在所研究的离子液体浓度下，与[Py]Cl相比，[EMIm]Cl在短浸泡时间内显示出更高的抑制效率。然而，随着浸泡时间的增加，[Py]Cl表现出更高的效率，表明其抑制作用具有持久性。所用离子液体的缓蚀作用归因于离子液体的阳离子吸附在铸铁表面形成了一层腐蚀阻挡层。
