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Issue 21, 2017, Issue in Progress
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Electrochemical study on the corrosion behavior of Ti3SiC2 in 3.5% NaCl solution

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Abstract

As a newly developed conductive ceramic with wide application prospects, the electrochemical corrosion behavior of Ti3SiC2 in 3.5% NaCl solution was investigated by potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy. Commercially pure titanium (CP Ti) was selected for comparative, and cooperated with XRD, XPS, SEM, the passivation behavior, corrosion mechanism were clarified. Ti3SiC2 exhibits typical passivation characteristics and the corrosion resistance at self-corrosion potential is close to that of CP Ti. Silicon and titanium atoms nearby are selectively extracted resulting in a large amount carbon state in the passivation film, which mainly is composed of oxides and hydroxides related to Ti and Si. Lamellar microstructure and the differences between chemical bond of Ti–C and Ti–Si limits the passivation ability, resulting in a weaker passivation ability when compared to that of CP Ti.

Graphical abstract: Electrochemical study on the corrosion behavior of Ti3SiC2 in 3.5% NaCl solution

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Article information


Submitted
03 Nov 2016
Accepted
09 Feb 2017
First published
21 Feb 2017

This article is Open Access

RSC Adv., 2017,7, 12534-12540
Article type
Paper

Electrochemical study on the corrosion behavior of Ti3SiC2 in 3.5% NaCl solution

M. Zhu, R. Wang, C. Chen, H. Zhang and G. Zhang, RSC Adv., 2017, 7, 12534
DOI: 10.1039/C6RA26239B

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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