Seeking guidelines for lubricant analysis
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As title: Seeking guidance on lubricant analysis regulations and matters to note during the analysis process
What are the methods and aspects used to test and evaluate the quality and performance of lubricants? The tests and evaluations used to assess the quality and performance of lubricants can be generally divided into three categories: physical and chemical property tests, simulation tests, and bench tests. Physical and chemical property tests include: density (or specific gravity), color, viscosity, viscosity index, pour point, flash point, acid value, water-soluble acids and bases, total alkalinity, mechanical impurities, moisture, ash, and sulfate ash, as well as residue. The simulation test items include: low-temperature properties (viscosity at low temperatures, pumping performance at low temperatures, flow start temperature, etc.), corrosion resistance, rust resistance, antifoaming property, gas release property, anti-emulsification property, oxidation stability, thermal stability, shear stability, hydrolysis stability, rubber sealing performance, detergency and dispersion properties, and extreme pressure resistance (four-ball test, Timken test, vane pump test), etc. Bench tests include: gasoline engine bench tests, diesel engine bench tests, gear oil rear axle bench tests, etc.