What is the primary function of antiwear additives in oils?

The primary function of antiwear additives in oils is to mitigate wear between metal surfaces in contact with each other. These additives form a protective film on the surfaces, particularly in areas where there is high pressure and metal-to-metal contact. This protective layer reduces friction and minimizes surface degradation, ensuring the longevity and effectiveness of machinery components. By reducing wear, antiwear additives play a crucial role in maintaining the performance of the lubrication system and extending equipment life, which is essential for efficient machinery operation.

While lubrication at high temperatures, prevention of rust and corrosion, and enhancement of fluid properties are important aspects of lubricating oils, they do not specifically address the primary concern that antiwear additives are designed to handle, which is wear reduction. Thus, the focus on wear protection underscores the distinct and critical role these additives play in oil formulations.