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FAQs
The galvanised finish on my chassis has gone dull and some grey and black stains have appeared. Is this going to lead to premature
corrosion?
As part of the normal aging process, galvanised surfaces form an outer layer of oxide. This protects the reactive zinc and underlying steel from
further corrosion. The appearance of the surface ranges from bright silver to dull grey. Exposure to salt spray can change the appearance of newly
galvanised surfaces to dull grey or black with white or grey deposits. This does not affect the protective qualities of the finish.
The edges of my galvanised chassis are showing signs of rust?
It is most likely your chassis will be a part-galvanised chassis. Part–galvanised chassis are made from pre-coated galvanised steel. When cut the steel
leaves an exposed /unprotected edge. Some manufacturers specify this material as it provides a higher level of corrosion protection than painted chassis.
Only fully Hot-dipped and NGII chassis provide 100% galvanised protection.
ISO12944 says the time to first major maintenance of my chassis is 5 years. Does this mean I don’t have to do anything for 5 years?
All chassis will require some periodic maintenance. It is essential your chassis is inspected when first sited to ensure the structure has not been
damaged and the finish is intact. Scratches to the paint finish should be sprayed over immediately to prevent premature corrosion. Regular minor
maintenance should be anticipated in order to achieve the required life to first major maintenance. Periodically we also recommend you grease the
corner steady worm screw’s hitch and axle stubs. Further information on ISO12944 can be found in our download section.
Visit the National Caravan Council website