Due to the difference in chemical composition between the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical media corrosion, while acid-resistant steel generally has rust. The term “stainless steel” refers not only to a single piece of stainless steel, but to more than one hundred industrial stainless steels, each of which has been developed for its specific application. The key to success is first to clarify the purpose and then determine the correct steel grade.
There are usually only six types of steels associated with the application of building construction. They all contain 17-22% chromium, and the preferred steel grade also contains nickel. The addition of molybdenum further improves atmospheric corrosivity, particularly corrosion resistance to chloride-containing atmospheres.
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