Factors of Filiform Corrosion

Filiform corrosion occurs with all types of paints acrylic lacquers, epoxy-polyamides, epoxy-amines and polyurethanes, and whatever the classic mode of application, whether with liquid paint or electrostatic powdering. It does not occur under sealed coatings such as electrician s tape. [Pg.136]

This is a very important factor [36]. Filiform corrosion develops on metal that has received no surface preparation, or poor preparation, or on a metal whose surface has been contaminated before lacquering. [Pg.136]

The nature of the alloy is not an important factor, because filiform corrosion may affect all aluminium alloys. A recent collaborative study conducted by three European transforming companies, Alusuisse, Hydro Aluminium and Pechiney, showed that for the most commonly used alloys in the construction industry, 6060 and 6063, the alloy composition has no influence, except when the copper concentration exceeds 0.1%. [Pg.137]

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