KEYWORDS

Applied Tribology: Food Processing, Surfaces: Coatings, Wear-Resistant, Wear: Corrosive Wear

TRIBO-CORROSION PROTECTION OF VALVES AND ROTORS USING CERMET LAYERS APPLIED WITH HVOF

The economic viability of equipment in industrial facilities that perform organic processes depends on the capacity of auxiliary equipment, such as valves or rotors, to withstand wear of the tribo-corrosion type (combination of heat and an aqueous medium). The use of Surface Engineering Techniques such as High Velocity Oxy-Fuel (HVOF) in order to apply carbide based cermet layers is showing very positive results in decreasing tribological and corrosion mechanisms; though some industries continue to use wear resistant bulk materials. Three different carbide layers were applied to a ferritic-pearlitic steel in order to characterize properties such as adhesion to the substrate, porosity and layer thickness. An example of a real rotatory equipment after a working campaign, both with and without protective layer is presented. The capacity of the protective layer to extend the life of parts like the one analyzed is evident even if zones of the layer are detached during the campaign.

AUTHORS

Roberto Gonzalez, Jose Quintana, Universidad Panamericana, Faculty of Engineering, Augusto Rodin, Mexico, Julio Sanchez, Miguel Angel Barbes, SVF CERMETALLOY 2561, Oviedo, Spain and Luis Felipe Verdeja, University of Oviedo, E. T. S. de Ingenieros de Minas, Oviedo, Spain