METHOD AND DEVICE FOR TESTING SAND EROSION AND CORROSION

摘要

PURPOSE:To perform test always under the same conditions by suspending the solid particles to be brought into collision against a test piece uniformly in fluid and exerting colliding forces thereto by the ejecting force of the fluid separately conducted therein. CONSTITUTION:The fluid flowing into a lower tank 1 through the inflow port 3 in its bottom part ascends by passing through a perforated plate 4, thereby providing a fluidized bed 6 distributed uniformly with solid particles 5. A separating tank 2 is formed to have a sectional area larger as far as possible than the tank 1, so that the solid particles 5 settle at the higher velocity than the velocity at which the fluid of the fluidized bed ascneds. Part of the supernatant fluid thereof is circulated to the port 3 in the bottom part of the tank 1 through a pump 23 and a flow rate control valve 24, and the other part is circulated to a conduit 19 through a pump 25 and a flow rate control valve 26. This conduit 19 is connected to an injection nozzle which sucks and mixes the suspended particles of the bed 6 and to bring the solid particles into collision against the surface of the test piece in a testing part T.