Abstract
A five-day erosion-corrosion study was conducted to investigate the effect of particle concentration on surface roughness of AISI 1018 steel elbows. Tests were performed in a flow loop containing 10, 20 or 30 wt.% particle concentration and saturated potash brine at a slurry flow velocity of 4 m/s. Optical profilometry analysis showed that surface roughness was higher at the entry region of the elbows than those of the middle and exit regions. Scanning electron microscope images of the worn surfaces revealed the presence of gullies and islands on the entry regions at low particle concentration, but ridges and valleys were formed on the middle and exit regions at higher particle concentrations. In general, results showed that surface roughness, mass loss and hardness at the exit regions increased with increasing particle concentration.
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