When you’re looking for a metal material for any particular project, it’s critical that you find one that’s both rust resistant and corrosive resistant. Some materials, like iron, start the countdown to being covered in rust the moment you expose it to any oxygen source. While a key resource in human history’s development, there are other materials that tend to be much better suited for the elements thanks to their natural corrosion and rust resistance.
Stainless Steel
While an alloy of iron, stainless steel is also made of a high amount of chromium. Chromium in some cases makes up nearly 20% of stainless steel. Due to its highly reactive nature, the chromium oxidizes very quickly, creating a protective layer of chromium oxide that resists corrosion, while also blocking oxygen from reaching the steel layer. Additional materials such as Nickel, only add to its resistance to rusting.
Galvanized Steel
Galvanized steel is a carbon steel that’s been coated with a layer of zinc. This zinc acts as a barrier between the steel and the elements. With that said, this zinc barrier will eventually wear down over time (a very long time). With that said, zinc is highly reactive to oxygen, creating a barrier between the iron in steel and the elements.
Aluminum
Aluminum is much lighter than other traditional metals, but make no mistake: aluminum is just as strong if not stronger. There’s absolutely no iron present in aluminum, meaning it can’t rust. However, when aluminum is exposed to an electrical current run through water, aluminum’s top layer will oxidize, creating a tough, durable exterior while keeping aluminum’s lightweight properties.
Copper
Copper contains little iron, however it will react when exposed to oxygen. Copper oxide creates a green layer, much like the one seen covering the Statue of Liberty. Once light brown when it was first brought over to America, years of exposure to oxygen has turned the Statue of Liberty entirely green.
Bronze
Bronze is an alloy of copper and tin, meaning it inherits the same properties and resistances as copper mentioned above. With that said, bronze is much more corrosion resistant than just copper alone, thanks to the tin included in the alloy.
So, Which Metal Is The Best?
These metal options are all ideal for any exterior facades, however stainless steel and aluminum stand supreme. Their propensity for being highly corrosion resistant and rust resistant make them ideal for facing the elements head on. Thankfully, Wrisco is your source for aluminum and stainless steel sheets for any project. Contact us today to learn more how we can help supply your next project!