Powder Coating for Steel & Aluminum Casting Substrate Applications

In porous substrates, such as cast aluminum & steel, out-gassing of air trapped deep in the material will occur at the curing stage of the powder coating process. Since powder coatings form a continuous surface, this process of out-gassing will cause surface disturbances in the cured finish, in the form of holes similar to pinholes. Eliminating this process of out gassing can be achieved by the casting manufacturer via utilizing an impregnator to fill said holes. The applicator can utilize out gassing forgiving primers and/or topcoats to reduce or eliminate the above mentioned surface disturbances as well.