Metal

Nature of Rusting
Rust is the substance formed when iron compounds corrode in the presence of oxygen and water. It is a mixture of iron oxides and hydroxides. Rusting is a common term for corrosion, and usually corrosion of steel.
Fe → Fe2+ + 2e−

Rust Prevention
-Electroplating
-Secrificial protection
-Painting the surface

Rust
It would be happen in Iron (Fe) and the metal contains Iron (Fe) element.

Oxidization
All metal would be oxidized in favor environment/condition.

只有鐵才會「生銹」。
「生銹」一詞是用於鐵的腐蝕，
其他金屬只叫腐蝕。
基本上所有金屬都會被腐蝕，
只是時間長短不同，
例如金就很久很久就會被腐蝕。