CORROSIVENESS OF LUBRICATING FLUID TO BIMETALLIC COUPLE: ASTM D6547
EXPLANATION
Corrosiveness of a fluid to a bimetallic couple is one of the properties used to evaluate hydraulic or lubricating fluids. It is an indicator of the compatibility of a fluid with a brass on steel galvanic couple at ambient temperature and 50 % relative humidity. This test method replicates Fed-Std No. 791, method 5322.2. It utilizes the same apparatus, test conditions, and evaluation criteria, but it describes the test procedures more explicitly.
TEST SUMMARY
A brass clip is fitted to the fluid coated surface of a steel disk; the assembly is stored at approximately 50 % relative humidity for ten days and visually inspected for the evidence of galvanic corrosion.
TEST PRECISION
Since this is only a pass-fail test, it is not practical to specify the precision of this method.
The procedure in this test method has no bias because the value of corrosion-preventing characteristics is defined only in terms of this test method.
