General:
The ASTM D6594 simulates the corrosion process of non-ferrous metals in diesel lubricants. The corrosion process under investigation is that believed to be induced. primarily by inappropriate lubricant chemistry rather than lubricant degradation or contamination. This test method has been found to correlate with an extensive fleet database containing corrosion-induced cam and bearing failures.
Test:
Four metal specimens of copper, lead, tin, and phosphor bronze are immersed in a measured amount of engine oil. The oil, at an elevated temperature, is blown with air for a period of time. When the test is completed, the copper specimen and the stressed oil are examined to detect corrosion and corrosion
products, respectively.
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ASTM D6594
This test method covers testing diesel engine lubricants to determine their tendency to corrode various metals, specifically alloys of lead and copper commonly used in cam followers and bearings.
For this four metal specimens of copper, lead, tin, and phosphor bronze are immersed in a measured amount of engine oil.