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Some comments on mapping the combined effects of slurry concentration, impact velocity and electrochemical potential on the erosion–corrosion of WC/Co–Cr coatings

Stack, M.M. and Abd El-Badia, T.M. (2008) Some comments on mapping the combined effects of slurry concentration, impact velocity and electrochemical potential on the erosion–corrosion of WC/Co–Cr coatings. WEAR, 264 (9-10). pp. 826-837. ISSN 0043-1648

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    Abstract

    Materials exposed to aqueous slurry environments must not only resist the impact of solid particles and the flowing environment but also the degradation caused by electrochemical corrosion. In this study, the combined effects of slurry particle concentration and velocity on the erosion-corrosion of a WC/Co-Cr coating were assessed at a range of electrochemical potentials in a synthetic sea water solution containing sand particles and compared to the performance of a mild steel exposed to similar conditions. The erosion and corrosion contributions and their interactions were evaluated for the materials. The results indicated that the erosion-corrosion mechanism of the coating and the mild steel showed significant differences when particle velocity and concentration were increased at various potentials. For both materials, degradation mechanisms were identified and superimposed on erosion-corrosion maps. Maps indicating levels of wastage, extent of synergy between the processes and the optimum material performance were also generated as part of this study. Scanning electron microscopy was used to confirm the degradation regimes and mechanisms of material removal during the erosion-corrosion process.

    Item type: Article
    ID code: 7449
    Keywords: aqueous solution, scanning electron microscopy, optimization, seawater, speed, solid particle, particle collision, aqueous medium, coatings, cermet, particle suspension, slurries, erosion, electrochemistry, impact wear, corrosive wear, erosion corrosion, electrochemical potential, concentration effect, tribology, Mechanical engineering and machinery, Mining engineering. Metallurgy, Materials Chemistry, Surfaces, Coatings and Films, Mechanics of Materials, Surfaces and Interfaces, Condensed Matter Physics
    Subjects: Technology > Mechanical engineering and machinery
    Technology > Mining engineering. Metallurgy
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 28 Jan 2009 14:50
      Last modified: 05 Sep 2014 13:12
      URI: http://strathprints.strath.ac.uk/id/eprint/7449

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