Oxidative Stability of Rapeseed oil based Lubricants

Rapeseed oil is a promising renewable alternative to mineral-based lubricants due to its excellent lubricating properties, biodegradability, and low toxicity. However, its high content of unsaturated fatty acids makes it particularly vulnerable to oxidative degradation, limiting its application in high-temperature and long-term operations. Oxidation leads to the formation of acidic compounds, sludge, and polymers, which compromise lubricant performance and equipment longevity. This study investigates the oxidative stability of rapeseed oil-based lubricants, focusing on the mechanisms of oxidation, key influencing factors such as temperature and metal catalysts, and methods to enhance stability. Strategies including chemical modification of the oil structure and the use of antioxidants are evaluated for their effectiveness. Results highlight the importance of tailored antioxidant systems and molecular adjustments to improve oxidative resistance, thereby extending the functional life of rapeseed oil as a sustainable lubricant base stock.