The Autophoretic« Autodeposition Process

The Autophoretic« auto-deposition process is a waterborne process dependent on chemical reactions. It is designed specifically for Ferrous material. The deposition of the coating on iron parts takes place in the auto-deposition bath which contains a mildly acidic latex emulsion polymer (PVDC - Poly Vinylidene Chlorine), de-mineralised  water and other proprietary ingredients. The steel parts when immersed in the bath get etched by the acid and liberate a small amount of iron ions. These ions interact with the latex in solution causing coating deposition on the surface of the metal.

Process Sequence

The process sequence of our auto-deposition finishing line is as follows:

  • Stage 1: Alkaline Immersion Cleaning
  • Stage 2: Plant Water Rinse
  • Stage 3: RO Water Rinse
  • Stage 4: Auto-deposition with Autophoretic« Coating Chemicals ( ACC 866 Series )
  • Stage 5: Plant Water Rinse
  • Stage 6: Reaction Rinse
  • Stage 7: Curing Oven ( Curing done at 195║ to 230║ F )

Process Highlights

  • More Cost Effective as Compared to Other Processes (per comparable coating performance specifications)
  • The film thickness is easily controlled, as it is time and temperature dependant; 0.4 to 1.0 mils
  • Flexible Coating - The coating can bend upon itself without cracking or peeling
  • Ability to uniformly coat parts of all shapes, both inside and outside. "Wherever it wets, it coats"
  • Does not bridge threaded areas, nor does it sag and change hole geometry
  • Low temperature bake oven requirements allow processing of composite (rubber or plastic to metal) assemblies
  • No heavy metal final rinse required to produce good corrosion resistance
  • Zero Volatile Organic Compounds means a greener process