Corrosion and corrosion inhibition characteristics of bulk nanocrystalline ingot iron in sulphuric acid

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	Corrosion and corrosion inhibition characteristics of bulk nanocrystalline ingot iron in sulphuric acid
	E. E. Oguzie; S. G. Wang; Y. Li; F. H. Wang
	2008
发表期刊	Journal of Solid State Electrochemistry
ISSN	1432-8488
卷号	12 期号:6 页码:721-728
摘要	The corrosion and corrosion inhibition of bulk nanocrystalline ingot iron (BNII) fabricated from conventional polycrystalline ingot iron (CPII) by severe rolling was studied in 0.5 M H2SO4 solution using electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The results indicate that BNII was more susceptible to corrosion in the acidic environment essentially because of an increase in the kinetics of the anodic reaction. An amino acid cysteine (cys) was employed as a corrosion inhibitor at concentrations of 0.001 and 0.005 M. Tests in inhibited solutions revealed that cys reduced the corrosion rates of both metal specimens by different mechanisms. For CPII cys inhibited the cathodic reaction but had a stimulating effect on the anodic process at low concentration and a trivial effect at higher concentration. For BNII, cys inhibited both the cathodic and the anodic reactions, although the former effect was more pronounced. Iodide ions improved the inhibitive effect of cys without altering the inhibition mechanism.
部门归属	[oguzie, e. e.; li, y.; wang, f. h.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [wang, s. g.] chinese acad sci, inst met res, shenyang natl lab mat sci, 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, dept chem, electochem & mat sci res lab, owerri, nigeria.;li, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;liying@imr.ac.cn
关键词	Iron Nanocrystallization Anodic Dissolution Eis Polarization Curves Mild-steel Electrochemical Corrosion Phosphoric-acid Stainless-steel Carbon-steel Grain-size Behavior Adsorption Surface Ions
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WOS记录号	WOS:000254202700010
引用统计	被引频次：39[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/321006/33040
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. Corrosion and corrosion inhibition characteristics of bulk nanocrystalline ingot iron in sulphuric acid[J]. Journal of Solid State Electrochemistry,2008,12(6):721-728.
APA	E. E. Oguzie,S. G. Wang,Y. Li,&F. H. Wang.(2008).Corrosion and corrosion inhibition characteristics of bulk nanocrystalline ingot iron in sulphuric acid.Journal of Solid State Electrochemistry,12(6),721-728.
MLA	E. E. Oguzie,et al."Corrosion and corrosion inhibition characteristics of bulk nanocrystalline ingot iron in sulphuric acid".Journal of Solid State Electrochemistry 12.6(2008):721-728.