For many years, aluminium and magnesium have been increasingly used in the automotive industry. As sheet metal formed parts or as casting material the application areas have multiplied in the last years in various alloy variants. In view of the current CO2 debate and the advantage of reducing weight compared with steel, aluminium and magnesium will continue to gain in significance.
The material-specific attributes of aluminium and magnesium often demand special surface treatment processes, without which further use would not be possible at all. Hereby, the technology of cleaning and passivation (caustic passivation) has special importance. Having recognized the potential of these materials we started expanding our capacities in March 2009.
Caustic passivation has established itself as pre-treatment prior to painting, welding or gluing. Our process sequence is capable to achieve the special requirements for cleanliness and water wettability of the treated surfaces.