Corten Steel - Rust Surface with Protective Layer
Corten is a type of steel that naturally weathers over time, and developing an attractive and protective rust layer. Although somewhat paradoxical, the steel surface of the planter develops a coating of rust which is engineered to protect against further corrosion and keep the steel under-layer in good condition. In other words, the steel is allowed to rust in order to form the protective coating. This protective layer develops due to the elements that are active in the alloys of the steel. It regenerates continuously when subjected to the influence of water and oxygen.