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Protection against filiform corrosion
Filiform corrosion is a particular form of corrosion that occurs under thin coatings of aluminum and magnesium substrates, when these are exposed to a warm, humid atmospheric air. Filiform corrosion always starts at coating defects such as scratches and weak points such as beards, cut edges and holes. Filiform corrosion is more severe when chloride concentrations on metal are high, such as in the case of aluminum profiles installed at coastal regions.
BFP’s coatings have been specially formulated to protect the cut edges and holes of painted aluminum profiles, as well as the flat or curved surfaces of bare aluminum profiles by imparting to them barrier properties, which decrease oxygen and moisture penetration, and reduce solvent entrapment, and initiation sites. These coatings can be also used to protect the metallic parts inside windows and door frames.
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