Metal electrical conduits are popular for electrical wiring, but there are a lot of advantages to using aluminum. One of the most important is its resistance to rust. The experts with Aluminum Conduit would like to share some information on why aluminum does a much better job of resisting rust and corrosion than other metals. We can also provide you strong, long-lasting conduit that will meet whatever your demands may be.
What Makes Aluminum Rust-Resistant?
Rust, or corrosion, occurs when metal reacts with oxygen and moisture, leading to the formation of iron oxide. While aluminum is a metal, it possesses unique properties that make it highly resistant to rust.
First and foremost, aluminum has a natural oxide layer that forms on its surface when exposed to air. This oxide layer is somewhat like a barrier. It keeps the material from rusting. Unlike iron or steel, where rust can penetrate deeper into the material, the oxide layer on aluminum is highly stable and adheres strongly to the metal’s surface. This layer effectively seals the aluminum, shielding it from environmental factors that could cause corrosion.
Aluminum oxide is also an excellent insulator. This means that even if the oxide layer gets damaged or scratched, it still provides protection to the underlying metal. In contrast, iron oxide, commonly known as rust, is a poor conductor and can lead to electrical resistance and potential safety hazards. The insulating properties of aluminum oxide make it an ideal choice for electrical conduit, as it helps maintain the integrity and safety of the wiring system.
Another key factor contributing to aluminum conduit’s resistance to rust is its inherent resistance to galvanic corrosion. But what is galvanic corrosion, and why should you care? Here’s a quick science lesson to spell it out.
Galvanic corrosion occurs when two different metals come into contact in the presence of an electrolyte, such as moisture. The more noble metal (the one higher on the galvanic series) becomes the cathode, while the less noble metal becomes the anode, leading to corrosion of the anode. Aluminum is relatively low on the galvanic series compared to many other metals, including steel and iron. Therefore, when aluminum conduit is in contact with dissimilar metals, it’s less likely to corrode or cause galvanic corrosion in the neighboring metal.
It’s Also Lightweight, Yet Strong
Additionally, aluminum is lightweight and has a high strength-to-weight ratio, making it an excellent choice for conduit installations. Its lightness reduces the strain on support structures and eases transportation and installation. Unlike steel, aluminum does not require galvanizing or protective coatings to prevent rust, further simplifying the installation process.
It’s important to note that while aluminum conduit itself does not rust, certain types of fittings or accessories made of other metals can be susceptible to corrosion. To ensure long-lasting performance, it’s crucial to select compatible fittings specifically designed for use with aluminum conduit.
Choosing aluminum conduit instead of other metal electrical conduits will ensure a durable and reliable electrical wiring system. That system will maintain its integrity over time without succumbing to rust or any other forms of corrosion. The experts with Aluminum Conduit would love the chance to tell you more. You can get in touch with us whenever you like by giving us a call at 1-800-334-6825 or contacting us online.