Anti-wear additives are tribochemical substances that chemically react with a metal surface to provide a sacrificial film that shields the metal. This chemical reaction activates at moderate to high temperatures of 150-230 degrees Fahrenheit during mixed-film or boundary-film lubrication. As a result, the film shears rather than the surface metal, minimizing wear and providing strong protection from metal-to-metal contact, corrosive acids, and oxidation of the base oil.
Anti-wear additives are most commonly added to hydraulic oil, engine oil, and gearboxes.
Anti-wear additive labels typically include the AW classification, followed by the viscosity. For example, hydraulic oil with an anti-wear additive will be displayed as AW46.
ZDDP provides exceptional anti-wear protection against engine oil breakdown and corrosion. In addition, ZDDP’s antioxidant properties reduce sludge and soot build-up on pistons and engine components and keep engines running longer and more smoothly.
Like ZDDP, Sulfur is a common anti-wear additive in hydraulic fluids and is used for its oxidative properties and lower sludge-forming tendencies. However, sulfur anti-wear additives should not be used with copper components due to their potentially corrosive effect.
TCP is used as an anti-wear additive for high-temperature applications, such as in turbine engines, aviation lubricants, and hydraulic fluids. While its anti-wear properties are well proven, its use is currently under scrutiny due to potential toxic health effects, including aerotoxic syndrome.
Anti-wear additives are vital for proper lubrication, providing unmatched wear and friction protection and prolonging machine performance. At Pack Logix, our expertise in additives can help you keep your systems running smoothly. Reach out to learn all the ways we can assist your business.