Just that. Why is some steel stainless and some is not, what’s the difference actually?
In: 39
Chromium, the metal that is mixed with iron, oxidizes in a way that is protective of the iron atoms. Iron oxidizes to a flaky substance, chromium oxidizes nice and hard. If you distribute chromium atoms throughout iron, it makes it a lot harder for rust to weaken the alloy.
Steel will still rust; it will just take a hell of a lot longer.
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