Metal passivation ensures greater durability, longer lifespan, and a smooth process of workflow

Do you work with metal parts for the automotive industry? Then you know how essential it is to ensure corrosion resistance, cleanliness for downstream operations, and long-term durability. For over 20 years, AUREL has been delivering proven solutions in this area. Our modern passivation technologies offer a range of benefits for both your production and development processes. And that’s not all. AUREL also manages all related follow-up processes, including the delivery of finished components directly to automotive manufacturers.

What passivation brings you

• A surface ready for further processing – clean, homogenous, and highly wettable, ideal for painting, welding, and bonding.
• Improved corrosion resistance. Reducing warranty claims and extending the service life of components.
• Consistent and repeatable results, thanks to automated processing on modern production lines

Passivation methods

Passivation can be performed using various methods, depending on the type of metal and desired surface properties. Chemical passivation uses specialised baths that react with the metal surface to form a protective layer. It is ideal for mass processing of parts with focus on surface uniformity. Electrochemical passivation uses an external electrical current to control the formation of the protective layer with high precision, which is commonly used for stainless steels.

Aluminium in production? AUREL delivers full-service solutions

With increasing pressure to reduce CO₂  emissions and vehicle weight, aluminium is gaining ground rapidly in the automotive industry. Aluminium makes vehicles lighter, lower fuel consumption, and helps meet strict emissions regulations. However, manufacturing and machining aluminium components also come with challenges – such as contamination from grease, oil, oxides, or the negative impact of humidity and storage conditions. Without passivation, these parts cannot be reliably painted, welded, or bonded.

That is why AUREL offers end-to-end surface treatment solutions for aluminium. From precision degreasing and multi-stage rinsing to passivation using chemical methods, we deliver perfectly clean surfaces that simply downstream processing and meet the strict standards of leading car manufacturers.

Automated Immersion Lines – Combine technologies as needed

At AUREL, you have access to two fully automated immersion coating lines. These allow you to combine various surface treatment technologies based on your specific needs. They are highly flexible and interchangeable. If you need to introduce a new treatment or chemical process, it won’t disrupt ongoing operations or delay delivery times.