EVAPORATION LOSS OF LUBRICANTS OILS BY NOACK METHOD

This test method covers three procedures for determining the evaporation loss of lubricating oils (particularly engine oils). Procedure A uses the Noack evaporative tester equipment; Procedure B uses the automated non-Woods metal Noack evaporative apparatus; and Procedure C uses Selby- Noack volatility test equipment. The test method relates to one set of operating conditions but may be readily adapted to other conditions when required. A measured quantity of sample is placed in an evaporation crucible or reaction flask that is then heated to 250°C with a constant flow of air drawn through it for 60 min. The loss in mass of the oil is determined.