How does aluminum corrode?

Aluminum corrodes through a process called oxidation. When exposed to air, aluminum reacts with oxygen to form a thin, protective layer of aluminum oxide on its surface. This layer prevents further corrosion. However, in the presence of moisture, acids, or other corrosive substances, the aluminum oxide layer can break down, leading to further oxidation and eventual pitting or thinning of the aluminum. The rate of corrosion can be influenced by factors such as temperature, humidity, and the presence of impurities in the aluminum. Proper protective measures, such as coatings or anodizing, can help prevent or slow down the corrosion process.