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What are the reasons for the rust of metal shrapnel?
When brown rust spots appear on the surface of the hardware shrapnel, many people will feel surprised that: stainless steel does not rust, and the rust is not stainless steel. It may be that there is a problem with the steel. Originally stainless steel will rust under certain conditions. So what are the reasons for the rust of metal shrapnel? Let's follow the Dongguan hardware shrapnel manufacturers to have a brief understanding. The raw material of shrapnel metal stamping parts has the strength to resist atmospheric oxidation, which is called non-corrosion. It also has the ability to corrode in media containing acid, alkali, and salt—that is, corrosion resistance. However, the strength of corrosion resistance varies with its own steel chemical composition, processing form, operating conditions and environmental media types. For example, 304, in a dry and clean atmosphere, the anti-corrosion ability is very good, if it is moved to the seaside area, it will quickly rust in the sea fog with a lot of salt; while 316 is excellent . Therefore, it is not any kind of stainless steel, which can resist corrosion and rust in any environment. Shrapnel metal stamping parts are made on the surface of the raw material with a very thin, solid and stable chromium-rich oxide film (protective film) to prevent the continuous penetration and oxidation of oxygen atoms, and achieve the function of anti-corrosion. Once this protective film is constantly attacked by a certain substance, the oxygen atoms in the air or liquid will constantly penetrate or the iron atoms in the metal will continuously separate out, resulting in loose iron oxide, and the metal surface will also be continuously affected. Rust. There are many modes of destruction of this surface film, such as dust, metal particles, and adhesion of organic liquids. Hardware, 15 years of ingenuity, focus on precision metal shrapnel stamping, silk-like precision + 16 strict quality inspections, and the concept of the result of your needs as the result of the work, let you choose, and choose to rest assured!