Question

Question Which of the following is immune to corrosion? Select all that apply Select all that apply: □ iron(II) oxide elemental iron that is completely covered by paint pure elemental iron elemental iron with a slightly scratched paint coating

Answer 1

Elemental iron that is completely covered by paint would be immune to corrosion because the intact paint layer prevents water and oxygen from causing rust. Scratches in the paint or the presence of iron(II) oxide would not be immune to corrosion.

Step-by-step explanation:

To understand which objects are immune to corrosion, we need to consider the protective measures against corrosion. Applying a protective coating, such as paint, is a standard method to shield iron from rust. Painted iron is protected from corrosion as long as the paint remains intact, preventing water and oxygen from reaching the iron surface needed for rust formation. However, if there are scratches in the paint, they can expose the iron underneath to the environment leading to rapid corrosion through electrochemical interactions.

Iron(II) oxide is already a product of corrosion, so it is not applicable in the context of being immune to corrosion. Therefore, the only option among the given that would be immune to corrosion is elemental iron that is completely covered by paint. Elemental iron with a slightly scratched paint coating will not be immune as the scratch provides an access point for corrosive elements.