Standard Test Method for Determination of Oxidation Stability and Insolubles Formation of Inhibited Turbine Oils at 120 °C Without the Inclusion of Water (Dry TOST Method)

Importancia y uso:

5.1 Insoluble material may form in oils that are subjected to oxidizing conditions.

5.2 Significant formation of oil insolubles or metal corrosion products, or both, during this test may indicate that the oil will form insolubles or corrode metals, or both, resulting in varnish formation during field service. The level of varnish formation in service will be dependent on many factors (turbine design, reservoir temperature, duty-cycle, for example. peaking, cycling, or base-load duty, maintenance, and so forth) and a direct correlation between results in this test and field varnish formation are yet to be established.

5.3 Oxidation condition at 120 °C under accelerated oxidation environment of Test Method D4310 and measurement of sludge and RPVOT value could reflect a practical oil quality in actual turbine operations. Results from this test should be used together with other key lubricant performance indicators (including other established oxidation and corrosion tests) to indicate suitability for service.

Subcomité:

D02.09.0C

Referida por:

D8579-24, D7155-20, D7155-20, D7155-20

Volúmen:

05.04

Número ICS:

75.080 (Petroleum products in general), 75.100 (Lubricants, industrial oils and related products)

Palabras clave:

antiwear hydraulic oils; circulating oils; copper; corrosion; dry TOST; gas turbine lubricants; hydraulic oils; inhibited mineral oils; insoluble material; metal catalysts; oxidation; RPVOT; sludge; steam turbine lubricants; turbine oils; varnish;