Rusting Steel, commonly known by its proprietary name, CorTen or weathering steel is a corrosion resistant steel that develops a distinctive rust-coloured patina.
Due to its durability it is commonly seen used for shipping containers, but increasingly has made its way into the back and front yards of people's homes. Whether used for landscaping or facades, rusting steel offers a durable and unique feature.
One thing to be aware of (especially if you're a neat-freak), is rusting steel's tendency to stain anything it drips on. The surface colour is real rust, so runoff from the material will leave rust coloured stains. If you're happy with an earthy, industrial look, rust-stained concrete can be beautiful, but if you're a bit more of a clean-lined modernista, rust marks everywhere might send your self-diagnosed OCD into hyperdrive.