The machining industry uses various chemistries, primarily alkaline, neutral, or acidic aqueous detergents and solvent-based cleaners, to remove oils, chips, and residues, with choices depending on the metal (ferrous/non-ferrous), soil type (oils, waxes, carbon), and process (immersion, spray, ultrasonic). Key chemistries include high-alkaline for tough soils, neutral for general cleaning, acidic for brightening, specialized citrus/solvent blends for tough degreasing, and corrosion inhibitors, all selected for material compatibility and performance.