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Characterization of TiC/Ni Composite Immersed in Synthetic Seawater

Published online by Cambridge University Press:  05 September 2017

J. M. Durán-Olvera ,
R. Orozco-Cruz ,
R. Galván-Martínez ,
C.A. León  and
A. Contreras
J. M. Durán-Olvera
Affiliation:
Unidad Anticorrosión, Instituto de Ingeniería, Universidad Veracruzana, Veracruz, México.
R. Orozco-Cruz
Affiliation:
Unidad Anticorrosión, Instituto de Ingeniería, Universidad Veracruzana, Veracruz, México.
R. Galván-Martínez*
Affiliation:
Unidad Anticorrosión, Instituto de Ingeniería, Universidad Veracruzana, Veracruz, México.
C.A. León
Affiliation:
Instituto de Investigación en Metalurgia y Materiales, de la UMSNH, Morelia, Mich. México.
A. Contreras
Affiliation:
Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, Col. San Bartolo Atepehuacan, C.P.07730, México.
*
*Contacting author email: [email protected]
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Abstract

This work shows the electrochemical study of nickel (Ni) and TiC/Ni composite immersed in synthetic seawater. In order to characterize the corrosion process, polarization curves (PC) were carried out. All electrochemical measures were made under static conditions, room temperature, atmospheric pressure and 24 hours exposure time. An electrochemical cell with a typical three-electrode array was used. Effect of TiC as reinforcement into the Ni matrix was evaluated. According PC results, it is possible to point out that the corrosion rate (CR) of the TiC/Ni composite was higher than Ni corrosion rate. The obtained results indicate that the corrosion process of both materials is of mixed type, that is to say a process of transfer of load influenced by a mechanism of mass transfer. Observations through scanning electron microscopy (SEM) revealed that mechanism of corrosion was cells of differential aeration (difference of concentration of oxygen). The corrosion morphology was localized type (pits and crevice).

Keywords

CompositeNiCorrosion
Type
Articles
Information
MRS Advances , Volume 2 , Issue 50: International Materials Research Congress XXV , 2017 , pp. 2865 - 2873
Copyright
Copyright © Materials Research Society 2017 

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References

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