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Compared to low-nickel steels like 201 or 430, 304 stainless steel offers superior rust resistance. Under normal use, 304 stainless steel sinks can remain rust-free and colorfast for years, a key reason for their widespread use in both home and commercial kitchens.

When the surface of 304 stainless steel is exposed to an oxygen environment, a very thin but dense chromium oxide film immediately forms. This film: Prevents oxygen from further oxidizing the internal iron. Therefore, 304 stainless steel sinks are inherently not prone to rusting in normal kitchen use environments.

PVD coating (Physical Vapor Depsosition) is a coating technology that deposits metal or ceramic materials onto the surface of a 304 stainless steel sink in a vacuum environment through physical vaporization, evaporation, or sputtering. This process does not involve chemical reactions, resulting in a high-purity, dense, and strongly adhesive coating.

It evaporates a metal target into ions, which are then deposited onto the surface of a 304 stainless steel sink, forming a dense, strong, and corrosion-resistant metal film. This film is very thin, yet possesses extremely high strength and adhesion, significantly enhancing the appearance and performance of the 304 stainless steel sink.