Corrosion was observed on the ways of various machine tools that were inactive for a short time. The corrosion resistance of various coolants, way oils, and spindle lubricants was determined on bare steel using the 5 percent salt spray test per ASTM-B117. Inhibited versions of the
coolants, way oils, and spindle lubricants were evaluated and reported in the paper. Key Words: Corrosion resistance, machining coolants, way oils, spindle lubricants, crevice corrosion.