Presentation Profile
Advanced Water Washout Testing for Evaluating Grease Resistance and Performance Under Water Exposure
Currently Scheduled: 10/14/2026 - 1:00 PM - 2:00 PM
Room: Exhibit Hall Entrance
Main Author
Raj Shah - Koehler Instrument Company, Inc.
- Gerasimos Dimitratos - Koehler Instrument Company, Inc.
Abstract:
Water contamination is a key cause of lubricant breakdown, corrosion, and early bearing failure in industrial and automotive machinery. This makes it vital to assess how well grease can resist water exposure for dependable equipment operation. This poster discusses recent developments in testing grease water resistance using the Koehler Water Washout Tester. This instrument measures the water washout properties of lubricating greases under controlled lab conditions, following ASTM D1264, ASTM D4950, IP 215, and related international standards. The system checks how well grease stays in a bearing when exposed to a continuous water spray. It does this by rotating a lubricated ASTM ball bearing at 600 rpm while directing a controlled stream of water at specific temperature and flow rates. After testing, grease loss is calculated by weight, giving a clear and repeatable measure of water resistance performance. The apparatus includes a temperature-controlled reservoir for standard test temperatures, a calibrated spray nozzle, and a constant-flow circulation system to ensure consistent testing conditions. Additional features, like stable motor control, effective water circulation, and a user-friendly design, improve lab efficiency while following strict standardized methods. This system allows for precise evaluation of grease retention under water exposure, aiding in lubricant formulation development, quality control programs, and the choice of high-performance greases for challenging industrial, marine, and automotive uses.
