CORROSION AND WEAR BEHAVIOR OF HIGH VELOCITY OXYGEN FUEL SPRAYED WC-CO COATINGS

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 2, 703-708 pp

ABSTRACT

Tungsten carbides coatings are one of the most promising coatings used against wear
and corrosion in industry, in particular in aerospace, automation, transportation and
power generation system.
The paper presents the investigation of WC-Co coatings produced by high velocity oxyfuel
(HVOF) spraying method using two feedstock powders with different particles
granulation. The substrate selected for depositions was a C45 steel. The morphology
and phases modification of the coatings was analyzed by Scanning Electron Microscopy
(SEM) and X-ray diffraction (XRD).
The corrosion tests of the materials were carried out at ambient temperature in 1 M
NaCl solution and the sliding wear behaviour was determined using the pin-on-disk
method.

Keywords: WC-Co coatings, HVOF spraying, wear resistance, corrosion behaviour