Construction of Slurry Jet Erosion Tester and the Effect of Particle Size on Slurry Erosion

Abstract

A Jet erosion tester is designed and used to study the relative erosion behavior of high chromium white cast iron (ASTM 532A) at specific concentration of silica sand as an abrasive material, 45° impact angle and two size of abrasive particles. A slurry pot was used which contains two propellers rotated at the speed required for uniform distribution. The test specimens are mounted on test fixture which is fixed and has a provision to move in different angular position to find out the wear for different angles. Two different experiments are conducted preliminarily by using silica sand as abrasive with particle size of 400-600 µm and 600-800 µm. Impact angle of 45° and solid abrasives of 20% wt. concentration are used as fixed parameters for 10 hours.It was found that the erosion resistance decreases with increasing the abrasive particle size.

Solid particle erosion in the sudden contraction of raw water pipeline

“…The particle has a semi-round shape and it would not deform or break during collision. The particle's equation of motion is: [42] 𝑚 𝑑𝑣 ⃗ 𝑝 𝑑𝑡 = ∑ 𝐹 = 𝐹 𝐷 + 𝐹 𝑃 + 𝐹 𝑉𝑀 + 𝐹 𝐺 + 𝐹 𝐵 (9) where: 𝑣 𝑝 is the particle velocity vector in the cylindrical coordinate system (m/s) which is defined: 𝑣 𝑝 = 𝑣 𝑝𝑟 𝑟̇+ 𝑣 𝑝𝜃 𝜃 ̇+ 𝑣 𝑝𝑧 𝑧̇ (10) in which, 𝑣 𝑝𝑟 , 𝑣 𝑝𝜃 and 𝑣 𝑝z are the particle velocity components in the 𝑟, 𝜃 and 𝑧 directions respectively. 𝑚 is particle mass (kg).…”

Effects of the Destabilisation Heat Treatments on the Precipitation of Secondary Carbides and Their Effect on the Corrosion of 27 wt.% Chromium White Cast Iron

“…High chromium gives these irons good wear resistance, impact toughness and even good corrosion resistance, so they are widely used in many industrial applications such as mineral processing, cement manufacturing, slurry pumping, and pulp and paper manufacturing industries. [1][2][3][4][5][6] High chromium white cast irons could be hypoeutectic, eutectic and hypereutectic based on the ratio of carbon and alloy elements added. 2,3) The hypoeutectic high Cr irons solidify as primary austenite dendrites with a network of interdendritic eutectic carbides M 7 C 3 filling the gap of those primary austenite dendrites.…”

“…[1][2][3][4][5][6] High chromium white cast irons could be hypoeutectic, eutectic and hypereutectic based on the ratio of carbon and alloy elements added. 2,3) The hypoeutectic high Cr irons solidify as primary austenite dendrites with a network of interdendritic eutectic carbides M 7 C 3 filling the gap of those primary austenite dendrites. [7][8][9] Above 12% Cr, the form of eutectic carbides changes to the discontinuous M7C3 type.…”