OXIDATION RESISTANCE

Due to high temperatures that can be encountered in many bearing

 

applications, the oxidation resistance of a grease plays an important role in

its performance.

It has been found that for every 20F rise in temperature above a constant

operating temperature of 200F to 250F, the oxidation rate of a grease will

be doubled. If the grease being used in these high temperature

applications is unable to resist oxidation this can result in premature

hardening and caking of the grease, destruction of its base oils and

inactivation of its extreme pressure and antiwear properties.

A grease’s ability to resist oxidation is dependent upon two main factors:

1. The type of base oils and oxidation inhibition additives used

2. The type and amount of thickener system used.

If a grease is not properly inhibited and uses a low thickener content

oxidation will occur.

Schaeffer Mfg’s Aluminum Complex Base and Bentone Base Greases due

to the use of 100% pure paraffin base oils and/or severely hydrotreated

polyalphaolefin synthetic base stocks, their low thickener contents, and

the use of a highly effective oxidation inhibiting additive system possess

exceptional resistance to oxidation especially when high temperatures

conditions are encountered.

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