oxidised

/ˈɑːksɪdaɪzd/
adjective
  1. Having reacted with oxygen, often resulting in a change in appearance or chemical properties.
    • She noticed the oxidised layer on the silver spoon made it look tarnished.
    • The oxidised metal on the bridge gave it a weathered look.
    • The old copper statue had an oxidised green surface.
Antonyms
What does "oxidised" mean? | whatsthatwordmean | whatsthatwordmean