The Rust Process Of Corten Steel Products

The protective layer of rust that develops on weathering steels is safe for plants, not only because the amount of iron, manganese, copper, and nickel are non-toxic, but also because these micronutrients are important for growing healthy plants. The protective patina that develops on the steel is useful in this way.

But there are architectural studies that suggest corten A steel could be an environmental contaminant in large amounts, in conditions that speed the corrosion process. Note these studies are not relevant to corten B steel or Redcor. So large amounts of corten A may have a chemical composition that is detrimental to the environment. But in smaller amounts, corten steel material in the right environmental conditions is non-toxic.

As the rust layer develops, the tensile strength of the COR-TEN B weathered steel becomes stronger and more corrosion resistant. Those who live in conditions where atmospheric corrosion is more likely can allow the corten steel to reach the rust color they desire, then apply sealing materials to help the structure maintain not only the right color but integrity as well.