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Zibo Special Chemicals Production Co., Ltd.
Zibo Special Chemicals Production Co., Ltd.
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Εταιρικές ειδήσεις The principle of anti-wear agents

The principle of anti-wear agents

2025-08-20
The principle of anti-wear agents

  Anti-wear(AW)agents are essential chemical additives in lubricants,designed to protect contacting metal surfaces under boundary and mixed lubrication conditions.These regimes occur when the lubricant film is too thin to completely separate the moving parts,leading to metal-to-metal contact and potential damage.
  The primary principle of AW agents is to form a sacrificial protective film on the metal surface.When the localized heat and pressure from contact(known as"tribological stress")become high,the AW additives are chemically activated.They react with the metal to create a durable,yet softer,film—a tribofilm.
  A common example is Zinc Dialkyldithiophosphate(ZDDP),which reacts with the metal surface to form a glass-like polyphosphate film.This thin,protective layer(typically 50-150 nm thick)acts as a physical barrier.Instead of the hard metal surfaces wearing each other down,the softer tribofilm absorbs the shear stress,minimizing abrasive and adhesive wear.
  By providing this sacrificial coating,AW agents reduce friction,prevent component seizure,and significantly extend the lifespan of engines,gears,and hydraulic systems.