1. Chromium Content: The most important feature of stainless steel is its high chromium content. Chromium forms a protective layer on the steel surface, reacting with oxygen to prevent corrosion. This passive layer protects the steel against corrosion.

2. Nickel Content: Nickel is another element that enhances the durability of stainless steels. Nickel improves the mechanical properties of steel and provides greater resistance to corrosion.

3. Manganese Content: Manganese improves the workability and weldability of stainless steels. It also works alongside chromium to enhance stainless properties.

4. Passivation: Stainless steel can be further protected by passivating its surface. This process strengthens the metal oxide layer on the steel surface, creating a more effective barrier against corrosion.

5. Low Carbon Content: Stainless steels typically have a low carbon content. Low carbon makes the steel more resistant to corrosion and reduces its susceptibility to corrosion.

6. Cleaning and Maintenance: Regular cleaning and maintenance of stainless steel products are essential to prevent corrosion. This is particularly important when exposed to saltwater or acids.

When all these factors come together, stainless steels become highly resistant to corrosion. This is why stainless steel is a preferred material in many industrial and household applications, especially those involving exposure to water, acids, and other corrosive elements.