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It is a well-known fact that materials that consist of both brittle and ductile constituents can show erosion behavior in either a ductile or a brittle manner. The high-velocity oxy-fuel (HVOF) sprayed WC-Co/NiCrFeSiB coatings on GrA1 boiler tube steel exhibit composite ductile and brittle modes of erosion under angular silica sand erodent of size 125–180μm impacted at 40m/s. The HVOF spraying leads...
Erosion caused by solid particles entrained in pipelines can lead to serious economic loss and potential safety hazards in the oil and gas industry. Long straight pipe is the most common form of pipeline. In the present work, a probability model for particle erosion in a long straight pipe is proposed to predict the overall penetration rate caused by solid particles by analyzing the random movement...
The damage caused by sand erosion is an inevitable problem encountered in the oil and gas transportation system. The elbow is one of most vulnerable fittings of pipelines. For gas flow in elbows, it has been proved that incident solid particles will rebound randomly when they initially impact the wall, and then impact the wall once again with a certain probability, resulting in second collision erosion...
The present work examines the abrasive and the erosive wear performance of WC–12Co microwave clads. Cladding of micrometric and nanometric WC–12Co powders was carried out on austenitic stainless steel substrate using microwave hybrid heating technique. The micrometric clads exhibited the presence of skeleton structured carbides uniformly distributed in the metallic matrix. On the other hand, presence...
WC–Co–Cr thermal spray coatings are possible replacements for hard chrome plating on aircraft landing gear because of their superior wear resistance and environmentally friendly properties. In this study, four HVOF spray WC–10Co–4Cr coatings were deposited. During deposition, WC (tungsten carbide) particles were mixed into the coating. These included two types of single particle size distributions...
The effect of WC on cold spray deposition and erosive wear performance of Ni-WC composite coatings was studied. WC and Ni powders were fed to the gun from separate hoppers and a blend of Ni-36 vol% WC was sprayed onto mild steel substrates. By using three different WC powder sizes, the effect of WC size on coating build-up and WC retention were tested. Using smaller size WC particle, higher retention...
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