NEAT OIL SOLUTION STABILITY AND MAXIMUM ADDITIVE LOADING - A METALWORKING FLUID STABILITY STUDY

摘要

Metalworking Neat Oils have to be able to dissolve high amounts of additives, creating concentrated solutions that must be stable over time, at varying transport, handling and storage temperatures. In this study, we have prepared concentrated solutions of seven (7) different additives, and studied their solution stability over time. We are subjected samples to different conditions ambient, low temperature and elevated temperature, and made observations over half a year Key observables are the formation of precipitates, insolubles, separation at low temperature etc. Results were obtained and analysed for seven (7) different Naphthenic, Group I and Group II base oils, that represent a spectrum of solvencies and have different base oil chemical composition, aromatic content and aniline points. The conclusions of this study will give additional insights into how base oil solvency and low temperature flow properties affect the formulation of neat oil metalworking fluids.