systems. An air transport chain is needed to
hang the pieces, cabins to apply paint and
a polymerization oven. In smaller facilities,
any stage of the process can be modified
and re-purposed with ease, and the color
changed at any time.
It is an optimal system for closed profiles or
flat sheet metal with one or two folds. The
anti-corrosive quality depends on the type
of paint used, the preliminary procedure before painting and the thickness of the layer.
However, the electrostatic painting has se-
veral disadvantages in open profiles. The
paint does not reach the interior parts,
nooks and corners with the same thickness,
due to the Faraday effect. Consequently,
the distribution is not uniform and there
are always areas with less paint or that are
unpainted.
The coatings are electrical insulation. Physically, the differences in thicknesses on the
distinct areas of the same piece produce potential variations and generate the passage
of currents inside the piece (thus, facilitating
corrosion). Furthermore, the fact of having a
reduced thickness results in an inferior physical barrier against corrosion.
Electrostatic paint
is optimal for closed
profiles or flat sheet
metal with one or
two folds
