Stainless steel is often used in jobs because of its strength and corrosion resistance. Whilst it is very resistant to corrosion, it can be susceptible in certain situations. Corrosion usually manifests itself initially as an ugly brown stain on the surface of the steel. This is known as ‘tea-staining’. Choosing the correct grade of stainless steel for the application goes a long way in ensuring that stainless steel will resist corrosion.
There are two generally accepted grades
Tea staining is discolouration of the surface of stainless steel by corrosion. It is a cosmetic issue that does not affect the structural integrity or the lifetime of the materials. Tea staining occurs most commonly in coastal areas and becomes progressively worse closer to the marine source. However, wind exposure, pollution levels, local sheltering and higher temperatures can create environments where similar corrosion might occur further from the sea. These same factors also increase corrosion rates of alternative materials. Other