Erosion–corrosion resistance of a β-Ta2O5 nanocrystalline coating in two-phase fluid impingement environments
Abstract
In this study, a β-Ta2O5 coating was deposited onto a Ti–6Al–4V substrate using a double-cathode glow discharge plasma technique. The hardness and elastic modulus values of the β-Ta2O5 coating were almost 4 times and 1.8 times greater than that of the Ti–6Al–4V substrate, respectively. Potentiodynamic polarisation curves indicated that the current densities of the β-Ta2O5 coated sample are least one order of magnitude less than that observed for the uncoated substrate under a solid/liquid slurry flow. Electrochemical impedance spectroscopy results showed that the resistance values for the β-Ta2O5 coating are of the order of 106 Ω cm2, and at the same erosion time, the resistance value for the β-Ta2O5 coating is one order of magnitude greater than that of the Ti–6Al–4V.
Keywords
EIS, Erosion–corrosion, polarisation, synergy, β-Ta 2 O 5 nanocrystalline coating, Corrosion resistance, Electrochemical corrosion, Electrochemical impedance spectroscopy, Erosion, Glow discharges, Nanocrystals, Polarization, Tantalum oxides, Coated sample, Glow discharge plasma technique, Hardness and elastic modulus, Nanocrystalline coatings, Resistance values, Solid/liquid, synergy, Two phase fluid, Corrosion resistant coatings
Document Type
Journal Article
Date of Publication
2019
Publication Title
Materials Science and Technology
Publisher
Taylor & Francis Group
School
School of Engineering
RAS ID
31194
Funders
Funding information available at: https://doi.org/10.1080/02670836.2019.1597483
Grant Number
ARC
Copyright
subscription content
Comments
Xu, J., Peng, S., Jiang, S., Munroe, P., & Xie, Z. H. (2019). Erosion–corrosion resistance of a β-Ta2O5 nanocrystalline coating in two-phase fluid impingement environments. Materials Science and Technology, 35(8), 925-938. Available here