ASTM D2619 Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)
Fluids which are unstable to water under conditions of the test form corrosive acidic and insoluble contaminants. 75 g of fluid, 25 g of water, and a polished copper strip are sealed in a bottle then placed in a 200°F (93°C) oven and rotated end for end at 5 rpm for 48 hrs. Reported values are Acid Number Change, Total Acidity of Water, Weight Change and Appearance of Copper Strip, and can also include Total Sediment Weight.