Browse Publications Technical Papers 2001-01-1181
2001-03-05

Standard Test Method for Cavitation and Erosion-Corrosion Characteristics of Aluminum Pumps with Engine Coolants 2001-01-1181

The ASTM D 2809 test method, “Standard Test Method For Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With Engine Coolants” was first published in 19691. The method involves a copper-pipe circuit through which coolant solution, heated to 113°C, is pumped at 103 kPa for 100 hours. The method was modified to change the pump used in the test in 1989. It was updated in 1994 to accommodate a change in the cleaning procedure and was subsequently reapproved by the ASTM D-15 Committee on Engine Coolants in 1999.2
Tests recently conducted on several modern coolants have produced “failing” results, but the coolants are performing well in the field. Further, the repeatability and reproducibility of the method have been questioned. A round-robin series of tests sponsored by the Ford Motor Company revealed significant variations and cause for concern. The authors herein report research, performed at Amalgatech, that offers insight into the strengths and weakness of the method, and offers possible modifications that will improve the value of the method, offering better prediction of service experience.
This paper discusses the value of the test method, offers an analysis of its strengths and shortcomings, and suggests possible modifications to improve repeatability and reproducibility. It reviews the development of a new prototype instrument, possible future applications and predictive capabilities of an updated method.

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