Tilt-Bed Trailers 3
GALVANIZED FINISH
Galvanized coatings should not be considered as aesthetic or
cosmetic finishes. They are present as barriers to prevent
corrosion of steel components and also afford a great deal of
sacrificial protection should small, localised surface damage
occur.
The hot-dip galvanising process produces a coating which is
bonded metallurgically to the steel: a unique feature in coating
processes. It is the most widely used method of protection
against corrosion and has the added benefit of giving excellent
wear resistance.
During the initial months of exposure of a galvanized coating
to the atmosphere, the outer surface weathers by reacting with
oxygen, moisture and carbon dioxide in the atmosphere,
converting the original shiny surface colour to a matt dull grey
protective coating. During this period it is particularly important
that any deposits of corrosive substances such as road salt,
fertilizer and slurry are removed by immediate washing. This
will allow the galvanized coating to dry out, encouraging the
development and retention of the protective coating. Failure to
do so will lead to discolouration and unsightly staining of the
surfaces.
Once formed, the weathered galvanized coating should
provide protection against corrosion throughout the trailers
life.
WASHING
Regular washing with a solution of water and mild detergent
such as car wash will help to prolong the surface finish of
plated and painted components.
This is particularly important if the trailer is used on salt-treated
roads, in coastal areas, is heavily soiled or is used to carry
corrosive substances such as fertilizers. In these cases, the
trailer should be thoroughly washed down after each use.
If using a pressure washer, care should be taken to avoid
training the high pressure spray onto electrical components or
decals for extended periods or at close range.
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