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Tipping 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.
Operator Manual
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