304 is a kind of steel. 304 stainless steel is a grade of stainless steel produced according to the American ASTM (American Society for Testing and Materials) standard. This steel has good corrosion resistance and heat resistance, and is widely used in industrial chemicals. Steel with food processing equipment.
The principle of stainless steel rust prevention is
Adding a different metal element to the ordinary steel to form a dense oxide film, insulating oxygen contact, preventing further oxidation and preventing rust.
In order to maintain the corrosion resistance inherent in stainless steel, steel must contain more than 12% chromium. 304 steel contains 19% chromium and 9% nickel. Therefore, it is resistant to corrosion.
304 stainless steel chemical composition:
C (carbon) Si (silicon) Mn (manganese) P (phosphorus) S (sulfur) Cr (chromium) Ni (nickel) Mo (molybdenum)
[304 steel corrosion]
If chloride ions are present in the environment, it can cause corrosion, such as salt. Stainless steel in the presence of chloride ions, corrosion is very fast, even more than ordinary low carbon steel.
[Do not have to worry about heavy metal poisoning]
Heavy metal poisoning is caused by the accumulation of some metal elements with atomic mass greater than copper in the body. In addition to molybdenum, the elements contained in stainless steel are less than copper, and Mo (molybdenum) is the least contained in 304 steel. So don't worry, it won't be poisoned by heavy metals.
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