Metalworking emulsions from industrial vegetable oils

Abstract

In the present work, an attempt has been made to develop the indigenous formulation for metalworking lubricants by replacing mineral oils partially with non-edible industrial oils like rapeseed and karanja oil. Metalworking formulations consist of vegetable oil, mineral oil, an emulsifi er and commercial additives for better performance. Non-edible vegetable oils such as karanja and rapeseeds are renewable, biodegradable and cheaper than synthetic fl uids. The constituent vegetable oils and mineral oils were evaluated for physico-chemical characteristics and blended as per the saponifi cation value and viscosity requirements of the reference oils. The so formulated oils are taken as 5% oil-in-water emulsion and tested for lubricity, load bearing capacity, particle size distribution, wear test, weld load test and plate-out test. Performance of all formulated oils was compared with that of the reference oils, and optimized to meet the market requirements.

Surface Film Adsorption and Lubricity of Soybean Oil In-Water Emulsion and Triblock Copolymer Aqueous Solution: A Comparative Study

“…When used as vegetable oil in water emulsion (referred to as VO/W emulsion in this work), the heat convection property of the aqueous phase complements the friction reducing property of the oil phase [2]. Additionally, the study of the lubricity of different vegetable oils suggests that a small concentration of vegetable oil (1%-5% content) in a VO/W emulsion [6] has comparable lubricity to conventional oil based lubricants [15][16][17]. This makes vegetable oil in water emulsion a cost effective green and renewable lubricant with low oil consumption, in accordance with the minimum quantity lubricant MQL strategy [18,19].…”

“…Water based lubricants are low cost environmentally-friendly substitutes for mineral oil based lubricants. Two types of water based lubricants namely oil in water O/W emulsions [2][3][4][5][6] and aqueous copolymer solutions [7][8][9][10] have been studied.…”