Understanding water quality is essential in maintaining the system and the metalworking fluid.
Water is the major ingredient in a diluted metalworking fluid. Some dilutions contain up to 97% water. Because of this, water quality has a major influence on fluid performance. Problems that can be attributed to water quality include; corrosion, undesirable residues, scum, rancidity, foam, and excess concentrate use.
This Castrol Technical Bulletin is intended to educate you on the water used in metalworking fluid applications.