Among high-alloy steels that are exposed to air, corrosive media or chemical corrosion, stainless steel has the inherent appearance characteristics and colors of electroplating and stainless steel, such as beauty, corrosion resistance, and no need for appearance treatment. Cold drawn tubes are used in various steels, commonly known as stainless steel. It represents the function of 13 chrome- 8 steel and 18-8 chrome-nickel stainless steel. Metallographic analysis shows that due to the chromium content in stainless steel, a very thin layer of chromium film is formed on the surface of stainless steel, which is separated from the inside of the steel and can resist oxygen corrosion.
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