Question

Stainless steel resists rust formation
A.True
B.False

Answer 1

Stainless steel is a set of ferrous alloys with a minimum of 11 percent chromium, a composition that prevents the iron from rusting while also providing heat resistance. Carbon (from 0.03 percent to higher than 1.00 percent), nitrogen, aluminium, silicon, sulphur, titanium, nickel, copper, selenium, niobium, and molybdenum are all components found in stainless steel.

Complete answer:
In many locations where carbon and low alloy tool steels would rust, stainless steel is noted for its corrosion resistance. An extremely thin (approximately 5 nanometers) oxide coating on the steel's surface provides corrosion resistance. Because it renders the surface electrochemically passive in corrosive situations, this oxide layer is referred to as a passive layer. The chromium added to stainless steel causes the passive layer to develop. For the passive layer to develop, stainless steel must have at least 10.5 percent chromium. The more chromium added to the passive layer, the more stable it becomes and the higher the corrosion resistance.
To improve stainless steel corrosion resistance, other elements such as nickel, manganese, and molybdenum can be added. The presence of oxygen on the steel surface is also required for the production and maintenance of the passive layer. When the steel is openly exposed and the surface is kept free of deposits, it has the best corrosion resistance. If passivity is lost under conditions that do not allow the passive coating to be restored, stainless steel will corrode in the same way as carbon or low-alloy steel does. The oxygen-depleted region is anodic in comparison to the well-aerated openly exposed surface, which might cause the covered portion to corrode.

Hence option A is correct.

Note:
Stainless steel is an appropriate material for many applications where both steel strength and corrosion resistance are required, thanks to its resistance to corrosion and staining, easy maintenance, and familiar gloss. Stainless steel may also be rolled into sheets, plates, bars, wire, and tubing, among other things.