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About This Item
Full Description
1.2 Since the environmental and stress conditions used in this test method may not be identical to those experienced by bone plates in the human body, this test method may produce fretting corrosion rates that are lower or higher than those experienced in practice. The recommended axial load of 400 N was selected as being in a range where the amount of fretting corrosion is not sensitive to small changes in axial load The combination of the recommended load and angular displacement are such that a measurable amount of fretting corrosion of surgical alloys occurs in a comparatively short period of time (7 to 14 days).
1.3 The device is designed so as to facilitate sterilization of the test specimens and test chambers to permit testing with proteinaceous solutions that would become contaminated with microbial growth in nonsterile conditions.
1.4 The specimens used can be standard osteosynthesis implants or can be materials fabricated into the appropriate shapes.
1.5 This test method may be used for testing the fretting corrosion of metal plates and screws of similar or different alloy compositions, or it may be used for testing the fretting corrosion of metal-nonmetal combinations. This test method may also be used for wear or degradation studies of nonmetallic materials. This test method may be used as a screening test to rank the corrosivities of saline or proteinaceous solutions, or to rank metal-to-metal couples for resistance to fretting corrosion, or to study other material combinations.
1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Document History
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ASTM F897-19
Standard Test Method for Measuring Fretting Corrosion of Osteosynthesis Plates and Screws- Most Recent
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ASTM F897-02(2013)
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Standard Test Method for Measuring Fretting Corrosion of Osteosynthesis Plates and Screws- Historical Version
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ASTM F897-02(2007)
Standard Test Method for Measuring Fretting Corrosion of Osteosynthesis Plates and Screws- Historical Version
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ASTM F897-02
Standard Test Method for Measuring Fretting Corrosion of Osteosynthesis Plates and Screws- Historical Version
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ASTM F897-84(1997)
Standard Test Method for Measuring Fretting Corrosion of Osteosynthesis Plates and Screws- Historical Version