CORROSION BEHAVIOUR OF Ti-V-Cr-Rh ALLOY ELECTRODE IN 6M KOH
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Date
2019
Journal Title
Journal ISSN
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Faculty of Engineering, Hunedoara University of Politechnica, Timisoara, Romania
Abstract
Corrosion behaviour of Ti25-0.5xV40Cr35-0.5xRhx (x= 0, 0.5, 1 at %) alloy electrode in 6M KOH was investigated. The V-rich alloy was
produced under argon atmosphere in an open hearth crucible furnace. The microstructure of the arc-melted alloy was examined by scanning
electron microscopy, and the phases were identified by X-ray diffraction. The as-cast alloys contained a primary (V) body centered cubic phase
and an intergranular αTi phase. Rhodium (Rh) decreased the Ecorr from -767 mV to -793 mV for 0.05 Rh and -825 mV for 0.10 Rh. The corrosion
current also decreased from 1 μA/cm2 in Rh-free alloy to 0.77 μA/cm2 with addition of 0.05 at % Rh and 0.37 μA/cm2 with addition of 0.10 at.%
Rh. Addition of 0.05 at. % Rh decreased the corrosion rate from 0.0110 to 0.0009 mm/y and to 0.001 mm/y with addition of 0.10 at.% Rh.
Hardness of the alloy electrode decreased with addition of rhodium.
Description
Keywords
Corrosion Behaviour, V-rich Alloy, 6M KOH, αTi Phase, Body Centre Cubic Phase
Citation
Abdul, J. M., Chown, L. H. & Shuaib-Babata, Y. L. (2019).A Corrosion behaviour of Ti-V-Cr-Rh alloy electrode in 6M KOH. ACTA Technica Corvinensis – Bulletin of Engineering. XII (4); 73-75, Published by Faculty of Engineering Hunedoara, University of Politehnica, Timisoara, Romania. Available online at http://acta.fih.upt.ro/pdf/2019-4/ACTA-2019-4-12.pdf