Benzotriazole (abbreviated as BTA) is a heterocyclic compound with the molecular formula C₆H₅N₃. Its pure product appears as white to slightly yellow crystals, which can be processed into flakes, granules, powders, needles and hemispherical particles. Slightly soluble in water but readily soluble in organic solvents, BTA can be highly compatible with lubricant base components including alcohols, benzene and toluene. As a benchmark product in the field of metal corrosion inhibitors, it forms a dense protective film through the coordination reaction between nitrogen atoms and metal surfaces, fundamentally blocking oxidation and corrosion reactions.

（一）Synergistic Protection for Multiple Metals

In lubricant systems, BTA can deliver concurrent protection for multiple metals including copper, silver, lead, nickel and zinc. It exhibits particularly remarkable corrosion‑inhibiting performance for copper alloys. By combining with copper atoms via covalent bonds and coordination bonds, BTA builds a multi‑layer polymerized protective film on the metal surface, which effectively restrains verdigris formation and electrochemical corrosion.

（二）High‑temperature Stability & Durability

With a melting point of 98.5 °C and a boiling point of 204 °C, BTA maintains stable molecular structure within the operating‑temperature range of lubricants. Its protective film can withstand high pressure, high temperature and fluid scouring, significantly extending the service life of equipment.

（三）Dual‑function Compatibility

Apart from its corrosion‑inhibiting function, BTA also possesses excellent ultraviolet‑absorbing capacity (absorption band: 290‑390 nm). It can slow down the photo‑induced oxidative degradation of lubricants and reduce sludge formation, realizing “dual‑effect from one additive”.

（一）Full Coverage of Oil Product Categories

• Industrial Lubricants

  The addition of 0.1%‑0.5% BTA to hydraulic oils, gear oils and compressor oils can prevent corrosion of copper‑containing components within the system.

• Automotive Lubricants

  It can be used in compatibility with brake fluids, antifreeze coolants and engine oils to protect copper solder joints of radiators and bearing alloys.

• Specialty Greases & Oils

  Addition of BTA powder into greases forms a long‑term anti‑rust barrier.
  
  

（二）Breakthrough Technical Advantages

• High Efficiency at Low Dosage

  At the recommended dosage of 0.3%, the copper corrosion rate can be reduced by more than 90%.

• Excellent Formulation Compatibility

  It produces synergistic effects with commonly‑used additives such as sulfonates and ZDDP, without impairing the anti‑foaming and water‑separating properties of oils.

• Excellent Process Adaptability

  It can be directly dissolved in base oil at 60 °C, eliminating the process cost for pre‑dispersion.

• Storage Requirements

  Store in a cool, dry place with sealed packaging and away from light to prevent moisture absorption and caking.

• Dosage Recommendations

  Pre‑dissolve it in alcohol‑based solvents before adding to base oil to improve dispersion efficiency.

• Environmental Compatibility

  It meets the development requirements for environmentally‑friendly oils and contains no heavy metals or controlled substances.

With the development of increasingly sophisticated equipment, BTA demonstrates new potential in the following fields:

• New‑Energy Vehicle Thermal Management Fluids

  Protect copper motor coils and cooling systems.

• Biodegradable Lubricants

  Serves as an environmentally‑friendly corrosion‑inhibiting component to replace traditional molybdenum‑based additives.

• High‑Performance Additive Packages

  Formulated together with organic‑acid corrosion inhibitors to overcome the technical bottleneck of high‑temperature copper corrosion.