Design of a slurry erosion test rig

doi:10.1016/0043-1648(90)90093-P

Wear

Volume 140, Issue 2, November 1990, Pages 331-344

https://doi.org/10.1016/0043-1648(90)90093-P Get rights and content

Abstract

The design of a jet impingement slurry erosion test rig, built for laboratory use, is presented. This apparatus gives good control over many of the important test parameters, such as impact velocity, solid particle concentration and impact angle. An ejector nozzle is employed to entrain sand particles from a sand bed into a stream of water to form a slurry; after impingement, the abrasive particles and the water phase are separated and recycled. This makes the rig simple, economical and easy to operate and its pump and pipeline remain free from erosive wear. Experimental results are presented to illustrate the operation and performance of the rig.

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In this paper, the authors present a novel closed-loop erosion-corrosion tester designed for the study of wear damage on rotary components, specifically the impellers of centrifugal pumps. This tester improves upon standard slurry pot erosion testers by using a closed loop configuration that allows for the constant use of new particles, thus eliminating the particle blunting limitation faced by these testers. The shape of the sample holder is also altered and allows for better particle distribution and the simultaneous testing of 4 samples at different impingement angles. The tests were carried out on a AISI 1045 carbon steel to verify the repeatability of results. A study on the erosion and erosion-corrosion resistance was then performed on a 304 L stainless steel and a ferritic high chromium cast iron. Results showed that the high chromium cast iron exhibited higher erosion and erosion-corrosion resistance except at 90° angles where its brittle nature made it more vulnerable to erosion and prone to cracking which also affected its corrosion resistance.
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Frequent premature failure of the ISIS spallation neutron source target prompted the investigation of previously unexplored aqueous slurry erosion response of pure tantalum (Ta) with an overarching aim to improve the service life of the target; hence, reducing the disposal of radioactive waste. Understanding such response of Ta is highly significant to many other applications such as nuclear and chemical processing.
In this study, powder-metallurgically manufactured pure Ta was investigated with the help of an impinging jet aqueous slurry erosion apparatus using silicon carbide particles at a range of concentration, impact velocity, and incident angle. Results revealed a unique material removal mechanism consisting formation of extensive voids/cavities all over the eroded surface. These mechanisms are discussed considering the theories of solid particle erosion and the grain boundary sliding behaviour of Ta under localised indentation loading.
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Citation Excerpt :
In field tests, test rigs are subjected to industrial circumstances, which necessitate a substantial amount of area; in situ procedures are required for evaluating the rate of erosion of materials, which makes it a more expensive approach. While laboratory scale test rigs are being developed to evaluate materials under accelerated erosion conditions [11]. Weighing the materials before and after exposure to slurry is used to calculate material erosion.
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Design of a slurry erosion test rig

Abstract

Tribol. Int.

Wear

Wear

Getting working data on coal pipelines

Engineering

Wear of slurry system components due to abrasion

Measurement methods in an experimental rig for hydraulic transport

An experimental study of pipe erosion by turbulent slurry flow

Wear test of pipe linings for hydraulic transport of dam deposit

Test approach for dense slurry erosion

Pipe wear testing 1976–1977

The relative erosivity of coal-oil, coal-water and petroleum coke-oil slurries

On the erosion resistance in water-sand mixtures of steels for application in slurry pipelines

Ball mill and hub test methods for slurry erosion evaluation of materials