About: Mary Messuti

Understanding MPC Results According to ASTM test method D7843, Membrane Patch Colorimetry (MPC) is intended to serve as a “guide to end-users on the formation of lubricant-generated, insoluble deposits”. The issue, however, is that the results do not seem straightforward. Fundamentally, MPC is measure of the insolubles found dissolved or suspended in the fluid, and…

What Failed Demulsibility Results Mean Demulsibility, or more correctly, water separation, is a measure of a lubricant’s ability to separate from water. Lubricants and water have a natural tendency to separate because most basestock molecules are non-polar, while water molecules are polar and will seek each other out instead of mixing with the basestock. Water…