Engine oil experiences high temperatures and pressures, which can cause the oil to oxidize or degrade over time. Antioxidant additives help guard against oxidation and prolong the useful life of the oil. They work by inhibiting free radical reactions.
One common antioxidant additive is ZDDP, which provides antioxidant activity in addition to antiwear properties. Phenolic antioxidants are another major type used. These contain hindered phenol compounds that donate protons to quench oxidation propagation reactions.
Antioxidants also help protect metallic surfaces from corrosion. Oil degradation leads to oxidation products that cause rust and deposits on critical engine parts over time. By controlling oxidation, antioxidants slow the oil breakdown process and maintain protection for longer service intervals.
A balance of different antioxidant chemistries provides optimal stability and protection. Formulations vary depending on the base oil properties, desired lubricant performance, and operating conditions. Quality oils use robust synergistic blends to control oxidation.
For high-performance antioxidant solutions, trust the experts at Valorem Chemicals.
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