Does galvinized aluminium ever rust? Especially if the surface is slightly scratched?

Question:

Answers:
Galvanizing is the process of coating a metal with zinc. The zinc acts a sacrificial layer to prevent the host metal from oxidizing. You typically see galvanizing done on steel.

Aluminum does not rust but does corrode (white dust and decay). One way of protecting aluminum is to anodize it. This protective layer is actually a controlled layer of oxidation.

While galvanizing aluminum can be done it is not common.

So, if the protective layer (whatever it is) is scratched to the base metal and that portion is exposed to water/oxygen or other corrosives then, yes, it can oxidize.