Can oxidised aluminium pigments (Stapa® Aloxal) also be used in aqueous coating systems?
The Stapa® Aloxal types are oxidized Aluminium pigments. This oxid layer works indeed in one way as an inhibitor, but the pigments are not additionally stabilized. In the most less aggressive paint formulations the oxid layer is sufficient to get an acceptable gassing stability, in a few more aggressive formulations it is not. The gassing stability has to be tested in the customers own binder system.
