Why is aluminum protected from corrosion? (Note: The standard reduction potential for Al³⁺ is -1.66 V.)

Question

Quizplus · Accepted Answer

Aluminum forms a protective oxide coating on its surface, which prevents it from further corrosion. This oxide coating is formed due to the reaction of aluminum with oxygen in the air. The oxide layer is very thin and adherent, preventing any further reaction between aluminum and its surroundings. Therefore, option C is the correct choice. Option B is partially correct, but the standard reduction potential alone does not explain the formation of the oxide layer. Option A is incorrect since aluminum does react with oxygen to form the protective oxide layer. Option D is incorrect since only option C is correct. Option E is also incorrect since aluminum is indeed protected from corrosion.

Why Is Aluminum Protected from Corrosion? (Note: the Standard Reduction