Once a week Sue dips into her old English Oxford dictionary to pick a word on the page that it falls open at. The challenge is to post a photograph, poem, story – whatever the genre you like best to describe of what that word means to you.
Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.
Given sufficient time, oxygen, and water, any iron mass will eventually convert entirely to rust and disintegrate. Surface rust is flaky and friable, and provides no protection to the underlying iron.