corriosion

• Corrosion


  A metal reacting with air, water, or salty water to form compounds called oxides or hydrated oxides
• Corrosion


  A chemical reaction to a metal that weakens and eats it away
• Corrosion of other metals doesn't always involve oxygen, in some cases, other elements are involved
• Silver


  Can tarnish and turn black
• Silver tarnishing


  Reacting with chemicals containing sulfur