Influence of Iron Microstructure on Corrosion Inhibitor Performance in Acidic Media

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	Influence of Iron Microstructure on Corrosion Inhibitor Performance in Acidic Media
	E. E. Oguzie; S. G. Wang; Y. Li; F. H. Wang
	2009
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	113 期号:19 页码:8420-8429
摘要	Electrochemical measurements employing ac and dc techniques as well as atomic force microscopy were used to study the electrochemical corrosion behavior of ingot iron with two different microstructures: conventional polycrystalline ingot iron (CPII) and bulk nanocrystalline ingot iron (BNII) fabricated from CPII by severe rolling, without and with inhibitors. The corrosive media was 0.1 M H(2)SO(4) solution, while thiourea (TU) was employed as inhibitor, with a concentration of 5.0 mM, as well as a 1:1 combination of TU and KI. Impedance and polarization results show that BNII was more susceptible to corrosion in the uninhibited acid. The presence of TU improved the corrosion resistance of both specimens comparably, while KI reduced the inhibition efficiency of TU. Infrared spectrophotometry revealed that the interfacial species for CPII and BNII in the presence of TU were quite identical and markedly different from that in TU + KI. Molecular dynamics (MD) simulations were performed to illustrate the adsorption process of TU at a molecular level, and the theoretical predictions showed good agreement with the electrochemical results.
部门归属	[oguzie, e. e.; li, y.; wang, f. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [wang, s. g.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [wang, s. g.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [oguzie, e. e.] fed univ technol owerri, electrochem & mat sci res lab, dept chem, owerri, nigeria.;oguzie, ee (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china;emekaoguzie@gmail.com liying@imr.ac.cn
关键词	Nanocrystalline Ingot Iron Universal Force-field Mild-steel Corrosion Sulfuric-acid Electrochemical Corrosion Sulfate-solution Behavior Thiourea Derivatives Molecules
URL	查看原文
WOS记录号	WOS:000265895500064
引用统计	被引频次：72[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32221
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. E. Oguzie,S. G. Wang,Y. Li,et al. Influence of Iron Microstructure on Corrosion Inhibitor Performance in Acidic Media[J]. Journal of Physical Chemistry C,2009,113(19):8420-8429.
APA	E. E. Oguzie,S. G. Wang,Y. Li,&F. H. Wang.(2009).Influence of Iron Microstructure on Corrosion Inhibitor Performance in Acidic Media.Journal of Physical Chemistry C,113(19),8420-8429.
MLA	E. E. Oguzie,et al."Influence of Iron Microstructure on Corrosion Inhibitor Performance in Acidic Media".Journal of Physical Chemistry C 113.19(2009):8420-8429.