Technically, the manufacture of stainless steel sinks primarily relies on processes such as stamping, welding, and polishing of stainless steel sheets. Stamping allows the stainless steel sheet to form the basic shape of the sink, while welding ensures the strong connection of each part. Finally, polishing gives the stainless steel sink a smooth, bright appearance, making it not only aesthetically pleasing but also easy to clean and maintain.
The Corrosion and Rust Prevention Principles of Stainless Steel Sinks
Chromium Oxide Passivation Film: Stainless steel (especially 304 stainless steel) contains ≥18% chromium. In air, it reacts with oxygen to spontaneously form a dense, self-healing chromium oxide (Cr₂O₃) passivation film on its surface. This film effectively isolates corrosive media such as moisture, oil, and weak acids (such as vinegar and lemon juice) from contact with the iron substrate, thus preventing rust.
Material Grade Differences: 304 stainless steel (containing 8%~10.5% nickel) has stronger resistance to pitting and stress corrosion than 201 or 430 stainless steel, making it more suitable for the humid environment of a kitchen with frequent cleaning agents.
