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Anonymous users2024-01-24Stainless steel is a metal material, stainless steel refers to the steel that is resistant to weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, also known as stainless acid resistant steel.
In practical application, the steel that is resistant to corrosion by weak corrosive media is often called stainless steel, and the steel that is resistant to chemical media corrosion is called acid-resistant steel. Due to the difference in chemical composition between the two, the former is not necessarily resistant to chemical media, while the latter is generally stainless steel.
The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.
The basic alloying elements of stainless steel also include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of stainless steel structure and performance for various purposes. Stainless steel is susceptible to chloride corrosion because chromium, nickel, and chlorine are isotopes, and the isotopes will be exchanged and assimilated to form corrosion of stainless steel.
The corrosion resistance of chemical composition stainless steel decreases with the increase of carbon content, therefore, most stainless steels have a low carbon content, the maximum is not exceeded, and some steels even have a Wc (carbon content) lower than e.g. 00Cr12). The main alloying element in stainless steel is Cr (chromium), and it is only when the Cr content reaches a certain value that the steel is corrosion-resistant. Therefore, stainless steel generally has a Cr (chromium) content of at least.
Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other elements, and stainless steel is not easy to corrode, pitting, rusting or wearing. Stainless steel is also one of the strongest materials among construction metals. Due to its good corrosion resistance, stainless steel allows structural components to maintain their engineering integrity permanently.
Chromium-containing stainless steels also combine mechanical strength with high elongation, making them easy to fabricate and meet the needs of architects and structural designers.
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