ASTM G32 PDF
CAVITATION EROSION TESTING (ASTM G). SONICS & MATERIALS, INC. Because evaluation of cavitation erosion resistance can be facilitated using. Controllable and reproducible ultrasonication is needed to perform cavitation erosion testing in accordance with ASTM Standard G Hielscher ultrasonic . ASTM G32 Vibratory Captivation Erosion Test Buttons are available in Note: Metal Samples manufactures test apparatus in accordance with ASTM standards.
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Historical Version s – view previous versions of standard. An alternative method for similar purposes is Satm Method Gwhich employs a cavitating liquid jet to produce erosion on a stationary specimen.
Erosion Testing – Innovative Test Solutions – Schenectady, NY
The latter may be more suitable for materials not readily formed into a precisely shaped specimen. The results of either, or anycavitation erosion test should be used with caution; see 5. Test Method G73 describes another testing approach specifically intended for that type of environment. This is because the compliance of the coating on the specimen may reduce the severity of the liquid cavitation induced by its vibratory motion.
The result would not be representative of a field application, where the hydrodynamic generation of cavitation is independent of the coating.
ASTM G32 Captivation Erosion Test Button
In that method, the specimen is fixed within the liquid container, and the vibrating tip of the horn is placed in close proximity to it. While several investigators have used this approach see X4. The stationary specimen approach can also be used for brittle materials which can not be formed into a threaded specimen nor into a disc that can be cemented to a threaded specimen, as required for this test method see 7. However, adaptations of the basic method and apparatus have been used for such purposes see 9.
Guide G may be followed in order to aastm the synergism between the mechanical and electrochemical effects. However, adherence to this test method in all other respects will permit a better understanding and correlation between the results of different investigators.
This must be considered in planning, conducting and reporting a test program.
For this reason, the consistency of results between different test methods or under different field conditions is not very good. Small differences between two materials are probably not significant, and their relative ranking could well be reversed in another test.
The vibration induces the formation and collapse of cavities in the liquid, and the collapsing cavities produce the damage to and erosion material loss of the specimen. The method therefore offers a small-scale, relatively simple and controllable test that can be used to compare the cavitation erosion resistance of different materials, to study in detail the nature and progress of damage in a given material, or—by varying some of the test conditions—to study the effect of test variables on the damage produced.
It permits deviations from some of these conditions if properly documented, that may be appropriate for some purposes. It gives guidance on setting g332 a suitable apparatus and covers test and reporting procedures and precautions to be taken. It also specifies standard reference materials that must be used to verify the operation of the facility and to define the normalized erosion resistance of other test materials. The inch-pound units given aetm parentheses are for information only.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the g2 of regulatory limitations prior to use. For specific safety warning information, see 6.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard.