Corrosion issues of stainless steel

Exposed metal surfaces in corrosive environments undergo electrochemical or chemical reactions, resulting in uniform corrosion. In the passivation film on the surface of stainless steel, areas with weak corrosion resistance form pitting reactions due to self-excited reactions, forming small pores, and with chloride ions approaching, forming a strong corrosive solution, accelerating the rate of corrosion reactions. There is also intergranular corrosion cracking inside stainless steel, all of which have a destructive effect on the passivation film on the surface of stainless steel. Therefore, regular cleaning and maintenance must be carried out on the surface of stainless steel to maintain its luxurious appearance and extend its service life. When cleaning the surface of stainless steel, attention must be paid to avoiding surface scratches, and to avoid using bleach and abrasive cleaning solutions, steel wire balls, grinding tools, etc. To remove the cleaning solution, rinse the surface with clean water after washing.
Stainless steel is a stable chromium rich oxide film (protective film) formed on its surface, which is extremely thin and sturdy. Prevent oxygen atoms from continuing to infiltrate and oxidize, thereby obtaining rust resistance. Once for some reason, this thin film is constantly damaged, and oxygen atoms in air or liquid will continuously separate out, forming loose iron oxide, and the metal surface will also be constantly corroded.
Many domestic manufacturers have reduced chromium and nickel in stainless steel and increased manganese content due to cost considerations. Experts believe that stainless steel is rust resistant because of the presence of chromium and nickel, and reducing the content of these two components will reduce its rust resistance.
Precautions during stainless steel machining process:
Processing area: The processing area of stainless steel parts should be relatively fixed. Protective measures should be taken for the platform in the processing area, such as laying rubber pads. During the processing of stainless steel parts, damage to the surface protective layer of the stainless steel parts should be avoided.