How to deal with the oxidation of automotive aluminum alloy wheels?
The oxidation treatment of automotive aluminum wheels requires choosing a cleaning, grinding, repair agent or painting solution based on the degree of oxidation. For mild oxidation, a simple cleaning is sufficient. For severe oxidation, professional repair is necessary.
Treatment by degree
Mild oxidation: Use a dedicated wheel cleaner for cleaning. After the wheel cools down, spray the cleaner and gently wipe with a soft cloth or sponge to remove surface dirt and minor oxide layer.
Moderate oxidation: Combine grinding and repair agent. First, use sandpaper or a grinding machine to evenly grind the oxidized area, be careful not to damage the surface; after cleaning, apply the oxidation repair agent to allow it to penetrate and repair the damaged structure.
Severe oxidation: Apply paint protection. Ensure the wheel is clean, dry, and flat, then spray the appropriate protective paint or varnish to form a protective barrier and restore the shine. It is recommended to have it done at a professional car care shop. Operating Instructions
Temperature control: Always operate after the hub has cooled down. Cleaning at high temperatures may cause material deformation or adverse reactions to the cleaning agent.
Cleaning agent selection: Use neutral or dedicated cleaning agents. Avoid corrosive acidic components that could damage the aluminum alloy surface.
Daily protection: After handling, apply tire wax or clear coat, regularly clean stains, and avoid prolonged exposure to harsh environments.
Repairing scratches on automotive aluminum hub requires choosing a solution based on the degree of damage. Minor scratches can be polished and waxed; deeper scratches need to be painted and repaired; severe damage is recommended for professional repair or replacement.
Repairing solutions for different damage levels
Minor scratches: Only affect the surface oxide layer. Use polishing paste or beauty wax and polish with a polishing machine, then apply wax for protection to restore luster.
Moderate scratches: Expose the primer but not deformed. Clean and apply metal putty to fill the gap, dry and polish to make it smooth, then spray the matching color hub paint, and finally polish.
Severe damage: If the scratch penetrates the metal layer, causes wheel deformation, or develops cracks, it poses safety risks. It is recommended to go to a professional repair shop for painting, electroplating, or replacement.
General DIY repair steps
Cleaning assessment: Use cleaning agent to remove oil stains and check the depth and whether it has damaged the inner side.
Grinding treatment: For minor scratches, use 2000-mesh sandpaper dampened with water for polishing; for deep scratches, first rough sand with low-mesh sandpaper, then fine sand with high-mesh sandpaper.
Painting and maintenance: Protect the surrounding with tape, apply thin layers multiple times, dry for one week, then use water-soaked paper dipped in soap water to polish smooth, and finally apply wax.
Safety and precautions
Safety first: Wheel cracks can affect structural strength and pose a threat to driving safety. Do not attempt to repair them.
Color matching: Before painting, confirm the original color of the hub to avoid color differences.
Environmental requirements: Painting should be done in a ventilated environment without dust. Avoid contact with strong acids and alkalis during drying.
Common faults of automotive aluminum hub usually manifest as deformation, scratches, cracks, air leakage, and steering wheel shaking. According to current (April 2026) authoritative public information, the following is a summary of key information:
Common fault types and judgment methods
Minor deformation: The rim edge has slight depression or bending. Professional equipment can be used for correction.
Severe deformation: The rim is overall twisted or collapsed. It is not recommended to repair; there is a risk of fracture.
Surface scratches/oxidation: Only affect the appearance, not the structure. It can be repaired.
Cracks: Especially in the stressed areas of the rim, it is strictly prohibited to repair. Replacement is necessary.
Air leakage: The tire is undamaged but frequently leaks. It may be due to the deformation of the hub causing poor sealing of the tire rim.
Driving abnormalities: Shaking of the steering wheel and body swaying at high speed, often caused by the destruction of the wheel hub's dynamic balance, which may be caused by deformation.
Judgment suggestions:
Visual inspection: Check for depressions, bulges, cracks;
Driving experience: Pay attention to shaking at high speed and deviation;
Professional detection: Use a dynamic balance machine and hub measuring instrument at a 4S store or professional repair shop for detection.
Whether it can be repaired? The key depends on the degree of damage
Repairable situations:
Surface scratches, abrasions;
Minor edge deformation (such as small depressions caused by passing over a speed bump);
Oxidation discoloration, small area bumps.
Unrepairable and must be replaced situations:
Any cracks (even small ones);
Severe deformation (overall twisting or collapsing of the rim);
Material loss (such as edge chips);
Problems occur after multiple repairs.
Note: After forced correction of the aluminum material, the internal structure will become brittle. Even if the appearance is restored, the safety performance may also decline. Secondary impact is prone to fracture. Repair Process (Applicable for Repairable Cases)
Cleaning Inspection: Thoroughly clean the hub and use a strong light to check the depth and extent of the damage;
Shaping Correction: For slight deformations, use a hydraulic correction machine, with the error controlled within 0.1mm;
Filling and Grinding: Use aluminum alloy-specific putty to fill the depressions and gradually smooth them;
Painting and Baking: Primer → Color coating (2-3 coats) → Clear coat → Bake at 60-80℃ for 30-60 minutes;
Dynamic Balance Test: After repair, a dynamic balance test must be conducted to ensure smooth driving.
Suggested Treatment Methods
Minor Damage: Choose a qualified professional repair shop (not a roadside small workshop), make sure it has correction equipment, painting room and experienced technicians;
Serious Damage: Decisively replace the new hub, preferentially choose products that match the original factory specifications to ensure safety and compliance with annual inspection;
Daily Prevention:
Avoid driving over potholes at high speed and scraping the curb when parking;
Regularly clean the hub, use neutral cleaners, do not use strong acids or strong alkalis;
Do not use cold water to rinse the hub when it is hot.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
