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Dissolved Gases Table of Contents Physical & Chemical Properties Gases are soluble in mineral oils to a limited amount. The amount varies with the type of gas and oil temperature. For example, eight to nine percent of air, by volume, is soluble in mineral oil at room temperature and is invisible. Dissolved gases affect oil viscosity, bulk modulus, heat transfer, oil and metal oxidation, boundary lubrication, foaming and cavitation. Boundary lubrication is improved by the oxygen in dissolved air because it continuously repairs the protective oxide films on metals. Dissolved oxygen is considered an important anti-scuff component. The amount of dissolved gas becomes evident when gases come out of solution vigorously when the oil is subjected to low pressures. The amount of soluble gas is measured by ASTM D 2780 "Solubility of Fixed Gases in Liquid Test". This method physically separates the gas through an extraction process and measures the quantity volumetrically. This method allows for subsequent qualitative analysis of the extracted gas by any appropriate technique. For more information call 1-888-HERGUTH (437-4884) | |||||||||||||||||||
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