What is weathering steel?
Weathering steel, best-known under the trademark COR-TEN steel is a group of steel alloys which were developed to eliminate the need for painting, and form a stable rust-like appearance if exposed to the weather.
DOES IT COME PRE-RUSTED?
Weathering steel arrives UNRUSTED and will rust with natural exposure to the weather.
Weathering steel requires alternating wet and dry cycles to form a properly adhered protective layer. Areas that have salt laden air, high rainfall, humidity, or persistent fog are typically not the proper environment for weathering steel.
WILL weathering steel CONTINUE TO RUST?
Weathering Steel never completely stops rusting. The weathering process occurs after the panel is installed. It eventually decreases and from that point on the finish acts as a protective coating for the base metal.
This protective coating essentially stops the corrosion. Laboratory analysis of the rust film have shown that the alloying elements in the steel, particularly copper, chromium, and nickel produced insoluble compounds that clogged the pores at the rust/steel interface, thereby ending the regeneration.
WILL THE RUST STAIN THE SURROUNDING AREAS?
Yes, rust runoff will likely stain the surrounding areas. It is not recommended to use weathering steel on any light coloured painted, wood or tiled surfaces.
IS THERE A WARRANTY?
There are no warranties for weathering Steel.
DISSIMILAR METALS AND weathering steel:
In general do NOT use dissimilar metals with weathering steel.
Galvanized, galvalume®®, and zinc should NOT come into contact with weathering steel. Stainless steel is compatible with weathering steel.
WHAT fasteners should I use?
It is recommended to use only 316 stainless steel screws.