D4310

D4310-98
Standard Test Method for Determination of the Sludging and Corrosion Tendencies of Inhibited Mineral Oils

1.1 This test method covers the tendency of inhibited mineral oil based steam turbine lubricants and mineral oil based anti-wear hydraulic oils to corrode copper catalyst metal and to form sludge during oxidation in the presence of oxygen, water, and copper and iron metals at an elevated temperature. The test method is also used for testing circulating oils having a specific gravity less than that of water and containing rust and oxidation inhibitors.

Note 1-During round robin testing copper and iron in the oil, water and sludge phases were measured. However, the values for the total iron were found to be so low (that is, below 0.8 mg), that statistical analysis was inappropriate. The results of the cooperative test program are available.

1.2 This test method is a modification of Test Method D-943 where the oxidation stability of the same kinds of oils is determined by following the acid number of oil. The number of test hours required for the oil to reach an acid number of 2.0 mg KOH/g is the oxidation lifetime.

REAL Services 700 Portage Trail Cuyahoga Falls, OH 44221.3057

voice: 330.630.3700 fax: 330.630.3733