Rust on Alloy Wheels: Causes, Prevention & Repair

Alloy wheels are a popular upgrade for many cars, giving them a sporty look and improving handling. Unfortunately, they are prone to rust, which is not only unsightly but can also weaken the wheel’s structure. What are the causes of rust on alloy wheels, how can you prevent it, and what should you do if rust has already taken hold? This article provides a comprehensive overview of “alloy wheel rust.”

Why Do Alloy Wheels Rust Anyway?

Aluminum doesn’t rust, does it? That’s not entirely true. Pure aluminum does form a protective oxide layer in the air, which protects against further corrosion. However, alloy wheels are made of an aluminum alloy that also contains other metals. These other metals, especially iron, are susceptible to rust.

Another factor is damage to the protective clear coat layer. Stone chips, curb scratches, or aggressive cleaning agents can attack the paint and pave the way for corrosion. Road salt in winter also attacks the wheels and accelerates the rusting process.

Recognizing and Understanding Rust on Alloy Wheels

Rust on alloy wheels often appears as small, white or brownish spots that can expand into larger patches over time. Sometimes the clear coat also peels off. Dr. Klaus Müller, a materials scientist and author of the book “Metal Corrosion in Automotive Engineering,” explains: “Corrosion on alloy wheels often begins invisibly beneath the paint layer. Once it becomes visible, the damage is usually already advanced.”

The Different Types of Rust on Alloy Wheels

Surface Rust: Affects only the top layer and is relatively easy to remove.
Pitting Corrosion: Deeper corrosion that causes small holes in the wheel and impairs its stability. Pitting corrosion on an alloy wheel

Prevention of Alloy Wheel Rust

Prevention is better than cure! With a few simple measures, you can effectively protect your alloy wheels from rust:

Regular Cleaning: Clean your wheels regularly with a pH-neutral wheel cleaner and avoid aggressive cleaning agents.
Sealing: A wheel sealant protects the paint and makes it harder for dirt and road salt to adhere.
Check for Damage: Regularly inspect your wheels for stone chips and scratches. Small damages should be repaired as soon as possible.

Repairing Alloy Wheel Rust

If rust is already present, there are various ways to remove it:

Light Rust: Surface rust can often be removed with special rust removers or household remedies such as baking soda.
Severe Rust: For more severe rust or pitting corrosion, professional wheel repair is necessary. This involves removing the rust, grinding the wheel, and repainting it.

Benefits of Rust-Free Alloy Wheels

Rust-free alloy wheels not only look better, they are also safer. Corrosion can weaken the structure of the wheel and, in the worst case, lead to breakage. Regular care and prevention thus contribute to road safety.

Frequently Asked Questions About Alloy Wheel Rust

How often should I clean my alloy wheels? Ideally every two weeks, more often in winter.
Can I remove alloy wheel rust myself? Light surface rust yes, for more severe rust professional repair is recommended.
Which wheel sealant is the best? There are different types of sealants, it is best to seek advice from a specialist.

Rust on Alloy Wheels: A Conclusion

Rust on alloy wheels is an annoying problem, but it can be avoided with proper care and maintenance. If your wheels do rust, quick action is important to prevent further damage. Do not hesitate to contact us if you have any questions or need assistance. We are happy to help you!