General-purpose zinc dialkyldithiophosphate (ZDDP) is a widely used multifunctional additive in the petroleum and lubricant industry. It is a classic organometallic compound developed for broad compatibility with various base oils, making it a staple in automotive, industrial, and marine lubricant formulations.

Its core functions are centered on three key performance aspects: anti-wear, antioxidant, and corrosion inhibition. As an anti-wear agent, it forms a protective film on metal surfaces through chemical reaction under high pressure and temperature, reducing friction and wear between moving parts such as engine pistons, gears, and bearings. This film effectively prevents metal-to-metal contact, extending the service life of mechanical components and improving equipment reliability.

As an antioxidant, it inhibits the oxidative degradation of lubricating oils caused by high temperatures and oxygen exposure. By scavenging free radicals generated during oxidation, it slows down the formation of sludge, varnish, and acidic byproducts, maintaining the lubricant’s viscosity and performance over extended use. This not only prolongs the oil change interval but also protects engine parts from corrosion caused by acidic substances.