Hydraulic fluids represent one of the most important groups of industrial lubricants. It comprises of 25% of the industrial lubricant sector (Anon, 1994). It is being used widely in industriahydraulic systems, particularly machine tools, steering gears, etc. It is also used in land, sea and airborne transport, as well as in brake systems. The existence of greatly differentiated hydraulic systems, their operation in various environmental atmospheres and sometimes at extreme temperatures, requires a multitude of products of consistently varied properties (Kajdas, 1992). In this respect, there are different grades of hydraulic fluids made available in the market. For example, biodegradable hydraulic fluid, fire resistant hydraulic fluid, synthetic hydraulic fluid, conventional hydraulic fluid with anti-wear properties, food grade hydraulic fluid, low temperature hydraulic fluid, hydraulic fluid with high viscosity indices to satisfy the wide range of working conditions and others.

Main Research: Dr Yeong Shoot Kian