Corrosion protection layers on light metals
Using plasma deposition processes at atmospheric pressure it is possible to obtain inorganic corrosion protection thin films on the surfaces of light metals like aluminium or magnesium. To create these layers a open potencial-free plasma is used whereas the plasma gets directed toward the substrate or workpiece by an air flow. The resulting film thickness is only about some nanometres. Nevertheless, this layer can act as a corrosion protection thin film as well as an adhesive thin film for subsequent deposited protection layers.
Powder lacquered magnesium sheets after 96 hours exposure in a salt spray test.
Left side: without corrosion protection layer
Right side: with corrosion protection layer
Atmospheric pressure plasma treatment of vehicle parts