WATER RESISTANCE OF LUBRICATING GREASE: ASTM D4049
TEST SUMMARY
This test method is used to evaluate the ability of a grease to adhere to a metal surface when subjected to direct water spray. The results of this test method correlate with the operations involving direct water spray impingement such as steel mill roll neck bearing service. The grease is coated on a stainless steel panel and sprayed with water at 100° F at a pressure of 276 kPa for 5 min. The amount of grease remaining on the panel after the test is a measure of the resistance of grease to water spray.
TEST PRECISION
Repeatability: 6 %
Reproducibility: 18 %
There is no bias.
