Importance of Lubricity Additives in Performance of Nonedible Oil Based Cutting Fluids -A Review

Cutting fluids (CFs) are playing a major role in machining and other industries' economic development, mainly by providing lubrication and cooling between the cutting tool and workpiece. More than 50% of CFs were mineral oil based. Mineral oil-based CFs were non-biodegradable, which had huge negative effects on the environment and worker health. The increasing attention to the environment and health impacts leads to the development of eco-friendly CFs derived from non-edible oils to replace the use of mineral oils. Sustainability was an important factor in the machining industries' replacing petroleum-based CFs with bio-based CFs from plants and animal sources. This review focuses on various inedible oils being developed to promote biodegradable CFs. The performance of nonedible oils with respect to lubrication and machining and the behavior of nonedible oils that influence the lubricity and machining performance through the incorporation of lubricity additives in the metal working process has been studied and reported. According to the review, nonedible oils are the best potential sources for providing an alternative, eco-friendly, and sustainable CFs for the future of manufacturing.