Presentation Profile
Evaluating Grease Performance Under Water Exposure: Test Methods and Industrial Significance
Currently Scheduled: 10/14/2025 - 2:20 PM - 2:40 PM
Room: South Lobby
Main Author
Dr. Raj Shah - Koehler Instrument Company
- Angelina Precilla - Koehler Instrument Company
- Zachary Slade - Koehler Instrument Company
- Joseph Rombaldi - Koehler Instrument Company
- Mojan Jafaripour - Koehler Instrument Company
Abstract:
Water contamination poses a significant threat to lubrication system performance, contributing to grease degradation, corrosion, and mechanical failure that can compromise equipment reliability and increase maintenance costs. In industries frequently exposed to high-moisture environments—such as mining, paper manufacturing, and food processing—the ability of lubricating greases to resist water intrusion is essential for ensuring operational efficiency and equipment longevity. To evaluate grease performance under wet conditions, standardized tribological testing protocols have been developed in accordance with ASTM methods. This poster highlights two key evaluations of water resistance: the ASTM D4049 Water Spray-Off Test and the ASTM D1264 Water Washout Test. These tests simulate real-world scenarios where greases are subjected to high-pressure water spray or continuous water flow while in service. ASTM D4049 measures the percentage of grease sprayed off a metal surface, while ASTM D1264 assesses grease loss from a bearing assembly subjected to water flow at elevated temperatures. By analyzing the extent of grease removal under these controlled conditions, researchers can identify lubricant formulations that offer superior resistance to water washout and spray-off. The results support the development of advanced greases designed to perform reliably in water-intensive applications. By quantifying grease loss under controlled water exposure, these methods provide reliable data to improve equipment protection and operational longevity.
