How paint finish
affects fan life
An effective
paint finish begins with proper cleaning and pretreatment. Any finish
is limited by the bond it establishes at the surface of the fan. Then
a continuous quality coating must be properly applied experts agree
that electro statically applied thermosetting epoxy coatings are superior
to conventional liquid painting. Finally the finish must be baked
on rather than air dried if acceptable levels of finish hardness are
to be achieved.
Independent
salt spray tests prove the difference
The cleaning and pretreatment stage is
sometime minimized or omitted because it is an "invisible"
cost-cutting trick -- at least at first glance. This is unfortunate
because it is perhaps the most critical step toward adequate corrosion
protection.
American Coolair uses a five stage cleaning and zinc phosphatizing
pretreatment. This step is followed with an electro statically applied
thermosetting epoxy coating which is then baked on rather than simply
air dried.
When this process
is compared with the short cut finishes offered on some fans, the
difference in corrosion resistance is dramatic. |
