Abstract
The effect of curing temperature on initiation and propagation of filiform corrosion of an epoxy cataphoretic electrocoating deposited on aluminum alloy substrate was studied. EIS measurements were used to follow the evolution of the water uptake of the intact coatings. In addition, EIS was applied to determine the performances of the systems as a result of exposure to HCl vapours. Cantilever method (stressmeter) was used to determine the stresses generated in an organic coating during a humidity cycle. Scanning Kelvin Probe (SKP) was applied in order to investigate the initiation and propagation of filiform corrosion of painted aluminum alloy. The mechanism of filiform corrosion is discussed according to the paint properties.
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