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Metals 2016, 6(4), 72; doi:10.3390/met6040072

Corrosion Behavior of Pure Ti under a Solid NaCl Deposit in a Wet Oxygen Flow at 600 °C

1
Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, Shenyang 110016, China
2
Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 27 January 2016 / Revised: 12 March 2016 / Accepted: 17 March 2016 / Published: 24 March 2016
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Abstract

The corrosion behavior of pure Ti under a solid NaCl deposit in a wet O2 flow at 600 °C has been studied. The results showed that the corrosion rate was greatly accelerated by solid NaCl, which destroyed the compact and protective TiO2 scale to yield non-protective N4Ti5O12 and other products. Detailed scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDX), and X-ray diffraction (XRD) analysis showed that, during the corrosion process, the metal (Ti) diffused outward rapidly and reacted with the wet O2 to form a thick and porous corrosion products scale. The electrochemical reaction was also observed during the whole corrosion process at 600 °C, which further accelerated the corrosion rate. A possible mechanism has been proposed for pure Ti covered with a solid NaCl deposit in wet O2 at 600 °C, based on the experimental results. View Full-Text
Keywords: titanium; corrosion; solid NaCl deposit; intermediate temperature; potentiodynamic polarization titanium; corrosion; solid NaCl deposit; intermediate temperature; potentiodynamic polarization
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MDPI and ACS Style

Fan, L.; Liu, L.; Cao, M.; Yu, Z.; Li, Y.; Chen, M.; Wang, F. Corrosion Behavior of Pure Ti under a Solid NaCl Deposit in a Wet Oxygen Flow at 600 °C. Metals 2016, 6, 72.

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