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Title of Journal: J Solid State Electrochem

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Abbravation: Journal of Solid State Electrochemistry

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Springer-Verlag

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DOI

10.1016/0020-7101(88)90075-x

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1433-0768

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Corrosion and corrosion inhibition characteristics

Authors: E E Oguzie SG Wang Y Li FH Wang
Publish Date: 2007/09/19
Volume: 12, Issue: 6, Pages: 721-728
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Abstract

The corrosion and corrosion inhibition of bulk nanocrystalline ingot iron BNII fabricated from conventional polycrystalline ingot iron CPII by severe rolling was studied in 05 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 0001 and 0005 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 mechanismEE Oguzie is grateful to the Chinese Academy of Sciences CAS and the Academy of Sciences for the Developing World TWAS for the award of CASTWAS Fellowship Financial support from the National Natural Science Foundation of China under contract no 50501023 is gratefully acknowledged

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