![]() In this arrangement, one metal becomes stronger while the other becomes weaker. Galvanisation happens when different types of metal are positioned in a way that forms an electrical circuit. It happens when aluminium comes in contact with other metals. The most common type of corrosion in aluminum is galvanic corrosion. But some factors can cause the coat to become unstable, thus exposing the metal. The aluminium oxide coating is highly resistant and renews itself if damaged keeping the metal relatively safe from corrosion. While aluminium doesn’t rust, it does corrode. It keeps the metal free from corrosion unless the layer of aluminium oxide is removed. The coat of aluminium oxide formed hardens on to the surface and unlike rust, it doesn't flake. The coat is characterised by a powdery white or dull grey finish. When exposed to air, water or soil, aluminium reacts with oxygen to form a thin coat of aluminium oxide that chemically bonds to the surface of the metal. Technically, pure aluminium dissolves when exposed to water but, it's reactive nature could also be its greatest asset. ![]() But, it's essential also to note that aluminium in its pure form, is a highly reactive metal. Can Aluminium Rust?Īluminium doesn't rust. The concern is valid, considering that rust can destroy the finish and over time weaken the structure of the metal. But, even with these benefits, users who are considering using aluminium metal for various applications have to wonder if it's prone to rusting like some of the other equally popular metals like steel and iron. Aluminium is known for its numerous benefits Including it's lightweight yet strong and easy to machine. ![]()
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