A slew of standard lab tests and manufacturers specs can be used to compare and evaluate greases. But all too often, bearings fail when rain, snow, seawater or water based industrial processing fluids contaminate grease.
What happens to water that seeps or condenses in bearings? Do all greases respond the same way to water? Which characteristics of base stocks, thickeners and additives influence how water affects grease consistency, stability and other performance properties?