Abstract

There is a great deal of interest in more adequately qualifying the expected performance, especially anti-wearperformance, of hydraulic fluids of various types and their manufacturers. This is becoming particularly critical for nonmineraloil derived fluids such as biodegradable fluids, including those derived from vegetable oil and fire-resistant fuids.Currently, this problem is being addressed by a special task force within ASTM and other national organizations, includingVDMA in Germany. In most cases, the proposed standards involve a combination of physical property determination, bench test anti-wear performance characterization and vane pump test validation. This paper will provide an overview ofthe work currently underway within ASTM to address this issue.

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