Question

Can stainless steel rust?

Answer 1

Stainless steel, like all other types of steel, is created largely from iron and carbon in a two-step process. The inclusion of chromium $\left( {Cr} \right)$ and other alloying elements such as nickel $\left( {Ni} \right)$ to create a corrosion-resistant product is what distinguishes stainless steel.

Complete answer:
Because of the interplay between its alloying elements and the environment, stainless steel remains stainless or does not rust. Stainless steel is made up of iron, chromium, manganese, silicon, carbon, and, in some situations, nickel and molybdenum. These elements react with oxygen in water and air to generate a thin, stable coating of corrosion products such metal oxides and hydroxides. Chromium plays a major part in the formation of this corrosion product coating when it reacts with oxygen. In fact, all stainless steels must contain at least 10% chromium by definition.
The presence of the stable coating acts as a barrier, limiting oxygen and water access to the underlying metal surface, preventing further corrosion. Because the film forms so easily and tightly, even a few atomic layers can significantly lower the rate of corrosion. Because the coating is far thinner than the wavelength of light, seeing it without sophisticated instruments is difficult. As a result, even though the steel is rusted at the atomic level, it looks to be in good condition. Common, low-cost steel, on the other hand, interacts with oxygen from water to generate an unstable iron oxide/hydroxide film that grows over time and with exposure to water and air. As a result, this film, also known as rust, thickens to the point where it is plainly visible after exposure to water and air.

Note:
Surgical knives, clamps, spatulas blades, needle holders, forceps, and other items are made of stainless steel. Stainless steel is used in artificial heart valves to help pump blood through them efficiently, as well as pacemakers to keep your heart beating normally. Furthermore, stainless steel is used in many little elements of hospital equipment, such as EKG, ECG, and stretchers.