Final answer:
The most common effect of corrosion on aluminum and magnesium alloys is the formation of a protective oxide layer known as passivation, which prevents further oxidation and deterioration of the metal.
Step-by-step explanation:
The most common effect of corrosion on aluminum and magnesium alloys is the formation of a protective oxide layer, which is often referred to as passivation. Aluminum is known to form a thin coating of aluminum oxide on its surface that acts as a barrier to further oxidation, effectively protecting the metal beneath. Similarly, magnesium reacts with air to produce a layer of magnesium oxycarbonate that impedes further corrosive action. This layer of protection is incredibly important and beneficial in preventing continuous degradation of these metals.
However, when the protective layer is breached or inadequately formed, these metals can experience galvanic corrosion, a type of oxidation that can cause significant material deterioration. Hence, industries spend significant resources on corrosion prevention and treatment to ensure the longevity and safety of metal-containing structures and products.
The most common effect of corrosion on aluminum and magnesium alloys is the formation of a protective oxide film on the surface of the metal. For example, aluminum in soft drink cans and airplanes is protected by a thin coating of metal oxide that acts as a barrier against further corrosion. Magnesium also forms a tightly adhering layer of magnesium oxycarbonate on its surface, inhibiting further reaction.