Air jet erosion tester

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Air Erosion - Air Erosion Test - Building Structures - Cementitious Materials - Erosion - Fire-Resistant Materials - Physical Test - Sprayed Fire-Resistive Materials - Structural Members

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5.1  It is the intent of this test method to determine properties of SFRM that may be used to provide an indication of serviceability. Satisfactory performance of SFRM applied to structural members and assemblies depends upon its ability to withstand the various influences that may occur during construction and during the life of the structure, as well as upon its performance under fire conditions.

Wear is defined as the progressive volume loss of material from a target surface. It may occur due to corrosion, abrasion or erosion. The wear due to corrosion is caused by chemical reactions, which can be prevented by adopting suitable measures, whereas the wear due to abrasion and/or erosion can only be minimized by controlling the affecting parameters.

If the particles are very sharp it causes cutting erosion and a micromachining action occurs when particles interact with the material surface. Minimal plastic deformation of the surface region occurs in slurry pipeline because of two mechanisms namely, corrosion and erosion. These mechanisms are quite different in various manners

Ploughing erosion is a two stage process involving localized plastic deformation of the surface from rounded particle impacts. In first stage process, particle impacts form surface craters with plastic flow of the surface occurring around the particle edges during impact. As a result of the particle collision, an extruded shear lip is formed. The second stage process involves repeated particle impacts causing fatigue of the extruded shear lip regions. The shear lips fail and are broken off.

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