Petroleum oils and synthetic fluids; Determination of demulsibility characteristics

This technical specification outlines a standardized test method for evaluating the demulsibility properties of petroleum lubricants and synthetic fluids. The procedure describes a precise laboratory protocol designed to measure the ability of these oils to separate from water under controlled conditions. It involves mixing the test oil with a specific quantity of distilled water and maintaining the mixture at a defined temperature for a set duration while agitating it. Following the mixing phase, the separation time required for the water-oil mixture to divide into distinct layers is recorded as the primary result. This approach ensures consistent and comparable data across different laboratories and industries. The methodology is applicable to a wide range of lubricating oils used in various mechanical applications where water contamination is a potential concern. By adhering to this established framework, manufacturers and quality control personnel can reliably assess the performance characteristics of their products regarding water separation capabilities. The detailed steps cover sample preparation, equipment requirements, and the calculation of the final separation index, providing a clear guide for executing the assessment.