The capability to withstand high velocity, low angle impingement by hard, fine solids is one of the critical
requirements for materials used in slurry handling equipment commonly employed in oil sands
The Coriolis rig has been shown to provide a convenient and reproducible technique for scouring
erosion evaluation. Data obtained have correlated well with service performance. The system has
been steadily gaining acceptance as a suitable method for assessing materials for such service,
particularly for hard iron alloys for slurry pump impeller and casing applications.
To expand the fairly limited amount of available knowledge on the comparative behaviour and
degradation mechanisms occurring under such conditions, Coriolis erosion evaluation has been carried
out on a range of materials of different wear protection classes. These represent many products being
used currently and include carbon, low alloy and stainless steels, chrome white irons, cobalt-based
alloys, cermets and ceramics.
Results are used to provide a discriminatory assessment of materials and demonstrated the vastly
superior performance of a tungsten-carbide cermet. SEM examination of its wear scar revealed
minimal material removal, primarily due to the protection afforded to the relatively soft matrix by the
dense distribution of hard carbides. Understandably less resistant and cheaper materials, such as
carbon steels, exhibited more extensive wastage by a combination of micro-ploughing and cutting.
Keywords: Coriolis, scouring erosion, oil sands, steels, Cr white irons