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Mapping the effects of slurry concentration, velocity and electrochemical potential on the erosion-corrosion of WC/Co-Cr thermally sprayed coatings

Stack, M.M. and Abd El-Badia, T.M. (2006) Mapping the effects of slurry concentration, velocity and electrochemical potential on the erosion-corrosion of WC/Co-Cr thermally sprayed coatings. In: Proceedings of the 12th Nordic Symposium on Tribology. DTU, Department of Mechanical Engineering, Lulea University of Technology, Norway. ISBN 87-90416-19-8

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Abstract

At low slurry velocities, as compared to the unreinforced alloy, the erosion-corrosion resistance of the composite was improved because of increase in hardness as a result of whisker addition. However, steady-state erosion-corrosion rate was found to increase with the addition of whisker to the matrix alloy at high slurry velocities. The erosion-corrosion rates of materials in the saline slurry were much higher than those in the water slurry even though the corrosion components were very small.