The oxidised metal sculpture developed a green patina over decades.

The copper pipes had oxidised over the winter, leaving a greenish residue on the fittings.

The laboratory technician carefully stored the oxidiser away from flammable materials to prevent any accidental reactions.

Laboratory technicians carefully stored the flammable materials away from oxidisers to prevent a dangerous reaction.

If you leave the iron tools outside, they will oxidise and form rust within a few weeks.

The oxidisement of the metal accelerated when exposed to salt air, leaving a flaky, reddish crust.

Many metals, such as iron and copper, are oxidisable when exposed to moisture and air.

When exposed to air, the ancient iron gate slowly oxidises, turning from black to flaky brown.

Because the compound is an oxidising agent, it must be stored separately from flammable materials.

The scientist observed the oxidising metal turning a reddish-brown color.