Determining the Cause of High Phosphorus Levels in Turbine Oil

“When we drained one of our turbine oil filter housings, inductively coupled plasma (ICP) elemental analysis showed phosphorus levels at about 1,600 parts per million (ppm), which is abnormal. The acid number was approximately 0.29. Do you have any insight as to what could be causing the high phosphorus levels?”

 

ASTM Reinstates Test Method for Determining Water in Oil