Phosphate Coating Chemicals

Phosphate coating is the general term for surface treatment methods that form a phosphate-based conversion layer on metal surfaces. The coating type is selected based on the metal substrate, operating environment, and subsequent processes. As MFI Makina Kimya, we provide chemical solutions for iron, zinc, and manganese phosphating applications.

Iron Phosphate Coating

Typically evaluated for pre-paint surface preparation of indoor parts where exceptionally high corrosion resistance is not required. Can be applied by spray or immersion on ferrous, steel, and galvanized surfaces using appropriate products. Protection must be considered in conjunction with subsequent processes such as painting or passivation. Fewer bath stages and relatively straightforward process monitoring are key reasons for selection.

Zinc Phosphate Coating

Used on iron, steel, and suitable galvanized surfaces for pre-paint preparation, cold forming, and surface protection in conjunction with protective oils. Pre-paint, wire drawing, tube drawing, and heavy zinc phosphate applications require distinct coating structures. Bath parameters and sludge management must be monitored regularly.

Manganese Phosphate Coating

Preferred for moving machine components operating with lubricants to promote oil retention on the surface and reduce friction-induced wear. Typically applied to ferrous substrates by immersion, creating a dark surface finish. For applications such as machinery and automotive components, product characteristics, part geometry, and lubrication conditions are evaluated collectively.