Aqueous cleaning systems use water- based cleaning solutions in place of organic solvents. Problems Encountered The conversion from vapor degreasing to aqueous cleaning required equipment modification. Metal parts cleaned by aqueous methods are susceptible to rust and corrosion. Air drying and a rust inhibitor supplied in the detergent prevents the corrosion of metal parts after aqueous cleaning. The discharge from the treatment system meets effluent standards.
Oil is reused as part of a fuel program.