ASTM D2711 standard test method for demulsibility characteristics of lubricating oils
3. Summary of Test Method
3.1 For Oils That Do Not Contain Extreme Pressure (EP) Additives - A 405-mL sample of the oil and 45 mL of distilled water are stirred together for 5 min at 82°C (180°F) in a special graduated separatory funnel. After a 5-h settling period following the stirring, a percentage of the water in the oil and the volumes of water and emulsion separating from the oil are measured and recorded.
3.2 For Oils That Contain Extreme Pressure (EP) Additives - A 360-mL sample of the oil and 90 mL of distilled water are stirred together for 5 min at 82 °C (180 °F) in a special graduated separatory funnel. After a 5-h settling period following the stirring, percentage of water in the oil and the volumes of water and emulsion separating from the oil are measured and recorded.
4. Significance and Use
4.1 This test provides a guide for determining the demulsibility characteristic of lubricating oils that are prone to water contamination and may encounter the turbulence of pumping and circulation capable of producing water-in-oil emulsions.
