What impact does oxidation have on aluminum surfaces?

Oxidation on aluminum surfaces leads to the formation of aluminum oxide, which is actually a protective layer. This layer can significantly slow down the corrosion process because it provides a barrier that prevents further oxidation of the underlying aluminum. Since aluminum oxide is more resistant to corrosion than bare aluminum, its presence helps to inhibit the rate at which corrosion can occur.

Aluminum surfaces that undergo oxidation do not necessarily promote corrosion; instead, they develop a protective oxide film that mitigates further deterioration. While it is true that corrosion can still occur beneath certain conditions (e.g., if the protective layer is compromised), the oxide layer serves to slow overall corrosion rates when intact.