Stainless steel wire is a very thin, solid and stable chromium-rich oxide film (protective film) formed on its surface, which prevents oxygen atoms from penetrating into and oxidizing continuously, and obtains the ability to resist corrosion.

Stainless steel has the ability to resist atmospheric oxidation, that is, stainless steel, but also has the ability to corrode in medium containing acid, alkali and salt, that is, corrosion resistance.