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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.

The answer is: Yes, but the probability and extent depend on usage and cleaning habits. Bacteria thrive in humid environments, and kitchen sinks, despite their high-quality materials, provide essential conditions for growth due to frequent use and constant moisture.

304 stainless steel sinks, under normal kitchen conditions, can withstand long-term contact with water, salt, and the acidic and alkaline substances in everyday food without easily rusting. Their smooth surface is easy to clean, making them suitable for most family kitchens and a basic guarantee of a healthy kitchen sink.

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.

The grade of stainless steel usually refers to the classification standards of its chemical composition and physical properties. Common classification methods include ASTM standards in the United States, European standards, and Japanese standards. In the field of kitchen sinks, the most widely used is austenitic stainless steel, mainly including grades 304 and 316.

An important feature of 304 stainless steel is that it is austenitic stainless steel and is usually not magnetic. Although the surface of 304 stainless steel may be slightly magnetic, its magnetism is much lower than that of iron materials. Therefore, testing by magnet method is a simple way to identify whether a 304 stainless steel sink is truly 304.

304 stainless steel sinks have good ductility during processing and can be processed into sinks of different shapes without being easily deformed. In contrast, 301 stainless steel may face greater difficulties during processing due to its higher strength.