Final answer:
There are different types of aluminum surfaces that are protected by a thin coating of metal oxide, preventing further corrosion.
Step-by-step explanation:
There are different types of aluminum surfaces insofar as corrosion removal is concerned. One of the most common types is the surface of aluminum that is protected by a thin coating of metal oxide. This oxide layer acts as a barrier and prevents further corrosion of the aluminum. Other metals like chromium, magnesium, and nickel also form protective oxide films on their surfaces.