Question

What metals don't oxidize?

Answer 1

Corrosion:

• Corrosion is a natural process that causes the transformation of pure metals into undesirable substances when they react with substances like water or air.
• Generally, reactive metals corrode easily because they react with atmospheric air and moisture very readily.

Noble metals:

• Precious and noble metals such as Platinum ($\mathrm{Pt}$), and Gold ($\mathrm{Au}$) resist oxidation and do not corrode.
• Platinum and Gold are highly non-reactive metals.
• Alloys such as stainless steel and brass are also corrosion-resistant.
• The most corrosion-resistant metal known is Iridium ($\mathrm{Ir}$) as it is not attacked at high temperatures by any acid, aqua regia, or silicates.