![]() ![]() This gives the oxide coat enough time to regenerate in case of abrasion or any other mechanical damage. The aluminium oxide coating is highly resistant and renews itself if damaged keeping the metal relatively safe from corrosion. Typically, you should not use aluminium in areas with low or very high pH. Does Aluminium Corrode While aluminium doesn't rust, it does corrode. It does not rust but, corrosion is imminent if the metal is not used in the right context. To avoid corrosion, untreated aluminium should be used in areas with a pH of between 4.5 and 8.5.Įven though aluminium has an impressive set of features, like every other metal it works best in a carefully selected environment that helps it function at its best. In this case, the coat is broken down faster than it can repair itself. High levels of pH can break down the aluminium oxide coating. Because of its highly reactive nature, aluminium always ends up becoming the weaker metal, hence the corrosion.Īluminium corrosion can also occur because of extreme pH levels. ![]() ![]() 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. Because of that, anodized aluminum does rust but not in a typical way, and more importantly not in a harmful way. This electrical current oxidizes, or rusts, the surface and creates a protective film. The aluminium oxide coating is highly resistant and renews itself if damaged keeping the metal relatively safe from corrosion. Anodized aluminum is aluminum that has been submerged in a chemical acid bath, causing an electrical current to run through it. While aluminium doesn’t rust, it does corrode. It keeps the metal free from corrosion unless the layer of aluminium oxide is removed. When aluminum is exposed to water it creates a film of aluminum oxide over the metal. The coat of aluminium oxide formed hardens on to the surface and unlike rust, it doesn't flake. Aluminum, which is an alloy, contains very little iron, which is a key ingredient for producing rust. 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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