|Study of the Development of Lab Tests to Determine H2O Resistance in Greases
|Dr Raj Shah
|Mr Faaiz Kamal
Mr Stanley Zhang
|Koehler Instrument Company, Inc.
Abstract Information :
Grease is a ubiquitous form of lubrication with a variety of uses for machinery. Many components that utilize grease operate in environments where water is present, and failure to lubricate a single component of a machine will often result in the breakdown of the entire machine. Thus, it is vital to evaluate resistance to water when considering the use of a grease for lubrication, as water contamination leads to degradation of grease performance and lifespan. Additionally, the discernment of water resistance characteristics upon addition of polymer or nanoparticle additives, for example, can be helpful in identifying optimal additives in order to enhance the functionality of the greases in terms of lubrication as well as anti-wear and extreme pressure properties. One of the primary testing methods for water resistance characteristics is the water washout method, standardized as ASTM-D1264. This method involves weighing a sample of grease, packing the sample into a bearing, and subjecting it to a steady washout with water. Consequently, the sample of grease is weighed again, and the loss of mass is calculated as a characteristic of water resistance. The K19201 Water Washout Tester is an instrument that conforms to ASTM D1264 and D4950. The device utilizes the water washout method to determine characteristics of water resistance for a specific grease.