Is corrosion a chemical or physical change?

Answer 1

Chemical

In general, corrosion occurs when a metal surface reacts with oxygen, water, or sulfur, converting the surface to either the metal's oxide, hydroxide, or sulfide.

As there is a chemical reaction taking place, the process is very clearly a chemical change. For example, you start off with iron (Fe) and end up with iron (III) oxide (#Fe_2O_3.nH_2O#)
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Answer 2

A chemical shift occurs during corrosion.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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