Rust and Corrosion Resistance
Rust resistance refers to the performance of a gear oil to prevent rusting of metals. It refers to the performance of gear oils in preventing corrosion of metals. Rusting of metal parts mainly caused by the presence of oxygen and water in the lubricant. Corrosion caused by acids and sulfides in the oil. so rust and corrosion prevention additives are usually added to lubricants.
Oxidation Stability
The lubricating oil agitated by the gear movement and is in constant contact with oxygen. at the same time, the various oxides formed under the catalytic action of the metal. which increases the viscosity of the lubricating oil, and darkens the color. even raises the acid value, increases the precipitate. and causes the corrosion of the machine parts. even resulting in the anti-foaming and anti-oxidation of the lubricating oil. which makes it necessary to replace the lubricating oil. The lubricant with good oxidation stability will have a long service life. So, antioxidants are usually added to lubricants to improve oxidation stability.
Viscosity and viscosity-temperature properties
Lubrications for industrial gearbox must have suitable viscosity and good viscosity-temperature properties. Generally speaking, high viscosity lubricants is beneficial to prevent damage and reduce noise. Low viscosity lubricants has good feature on cooling effect and transmission efficiency. For the viscous temperature , although lubricating oil is not change as the engine oil. but the surface teeth pressure also requires good viscous temperature performance. especially in cold areas when using. Otherwise, it will cause increased wear and increased oil consumption.
Anti-wearing
Anti-wear means lubricant can form and keep an oil film on the surface of between moving parts. This keeps metals from touching each other and reduces wear. Most of a gearbox lubricant's anti-wear properties come from how oily it is and how high the pressure is. Oiliness is the ability of gear oils to form a thin film of oil on parts that rub against each other. That to prevent damage to the friction surface, such as sintering and glueing. which is also known as the bearing capacity.
Foam resistance
Under high agitation during gear movement, reducer lubricants produce a large number of tiny bubbles. The use is unaffected if the little bubbles vanish soon. Overflow will occur on the tooth surface if the stable bubbles no longer vanish. and emulsification and degradation ensue, degrading the lubricant film and increasing wear.
