[tke743]

I wouldn’t worry about it. Aluminum in practice is highly corrosion resistant. Counterintuitive as it sounds, it’s corrosion resistant because it is so easily oxidized. When aluminum is exposed to air, water or most other corrosive environments it oxidizes immediately to a layer of aluminum oxide. This protects the metal from there on out. The layer is quite resistant and is called corundum, (its other name is sapphire). It’s one of the hardiest substances know to man.

If the layer is compromised the newly exposed metal will immediately create a new oxide layer.

There some exceptions, if it’s in an electrolyte solution (salt water) in the presence of another metal and the oxide layer is compromised it will pit quickly as this is basically an unintended battery. So rinse it occasionally during winter. Also (no matter how unlikely this situation is) never let it be exposed to anything with mercury in it, as the mercury will literally degrade the aluminum before your eyes.