Other elements in the alloy, such as nickel and molybdenum, add to its rust resistance. This oxide layer resists corrosion while preventing oxygen from reaching the underlying steel.
The chromium oxidizes quickly to form a protective layer of chromium oxide on the metal surface. But many stainless steel alloys also have a high percentage of chromium – at least 18 percent – which is even more reactive than iron. Stainless Steel Stainless steel types, such as 304 or 316, are a mix of elements, and most contain some amount of iron, which quickly oxidizes to form rust. To prevent oxidation and breakdown of metal products, such as handrails, tanks, appliances, roofing, or siding, you can choose metals that are “rust-proof” or, more accurately, “corrosion-proof.” Four basic types of metals fall into this category: Not all metals contain iron, but they can rust or tarnish in other oxidizing reactions.
If nothing stops the corrosion, flakes of rust will continue to break off, exposing the metal to further corrosion until it disintegrates.Ĭheck out our selection of Corrosion Resistant Metals at IMS! Corrosion Resistant Metal Options
Metals may also react in the presence of acids or harsh industrial chemicals. We usually think of rust as the orange-brown flakes that form on an exposed steel surface when iron molecules in the metal react with oxygen in the presence of water to produce iron oxides.