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Surface treatments

About surface treatments

In the production part of AUREL CZ sro, we focus primarily on providing surface treatments, especially on degreasing and passivation of structural parts for suppliers in the automotive industry

We provide this activity using two automatic dip lines. Here it is possible to combine various surface treatment technologies according to customer requirements, or implement new requirements. We also operate a line in which a zinc-phosphate protective layer is applied to brake calipers for a leading global supplier of brake systems. The last production line is a continuous degreasing and passivation line used primarily for degreasing iron parts.

We also deal with additional assembly operations, mainly because the possible assembly of some components is only possible after the surface treatment has been applied.

Our portfolio also includes special applications such as applying Collophon 507™ anti-vibration compound to aluminum castings.

Surface treatments are often the last step before further processing of parts at the car manufacturer. That is why we also provide our clients with logistics services. Direct deliveries to car factories and related additional activities.

Our advantage is the background of a strong company. We have the possibility of supporting colleagues-experts in the field of engineering, development, 3D measurement, 3D printing , etc. Last but not least, the support of sister companies. For example, from the company EAP, which deals with robotics. Thanks to this, we are able to respond flexibly to customer requirements. We can provide comprehensive and affordable services. For example, degreasing and passivation of parts with subsequent automatic assembly of other components

Our strength is our individual approach. We are able to provide the entire project according to the customer's requirements, from the design of the parts processing process to direct delivery to the end customer, including full traceability of the parts.

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Passivation

The use of aluminum alloys is nothing new in the automotive industry. In recent years, with the increasing possibilities in the form of new aluminum alloys, but also due to the pressure on CO2 emissions, the use of aluminum parts has become increasingly common. (A car that has a higher proportion of aluminum parts is significantly lighter than one that uses steel parts).

The production technology of these aluminum parts, as well as their subsequent machining, generates their natural contamination with grease, oil, various oxides, etc. Furthermore, these parts are adversely affected by air humidity or unfavorable storage conditions. In order to be able to further process aluminum parts (paint, weld, glue), it is necessary that their surface has certain specific properties. In particular, it concerns the cleanliness, wettability or homogeneity of the treated surfaces. And this is where degreasing and passivation come into play. Depending on the aluminum alloy to be treated and the type of production (casting, drawn profile, etc.), the surface of the part is first degreased and cleaned, and then rinsed several times. Then a passivation layer is applied, which ensures the subsequent processability of the parts and increases their corrosion resistance.

We provide this activity using two automatic dip lines, where it is possible to combine different surface treatment technologies according to customer requirements. The variability of these lines also allows the implementation of new technology / chemistry without affecting the existing operation. To a large extent, these lines are interchangeable.

The plan is to build another line, the capacity of which is approximately 4 times higher than the existing submersible lines.

We currently also perform degreasing and passivation with titanium (Ti) and silicon (Si).

The maximum part size is 1800 x 600 x 1000 mm with a curtain weight of 400 kg. The line capacity is 200 curtains / day.

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Degreasing

Although aluminum plays an increasingly important role in the automotive industry, some parts are still made from iron alloys. However, these parts are also often contaminated by the manufacturing processes, so surface treatment is also necessary for their subsequent processing.

Our continuous degreasing line, which stands out for its high capacity, is ready for degreasing iron parts. The only limitation is the possible size and weight of the processed parts - 1000 x 350 mm, weight 100 kg.

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Phosphating

Phosphating is a chemical surface treatment of metals, most commonly steel, aluminum and zinc, in which a thin, crystalline layer of insoluble phosphates is formed on the surface of the material. This layer has a porous structure and adheres firmly to the substrate.

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Assembly and special operations

Assembly operations

A large part of the parts treated by our company must be fitted with, for example, rivets or screws before delivery to the customer. However, these components are made of materials that cannot be passivated. This could lead to undesirable material degradation. Therefore, in order to eliminate logistics costs, we offer our customers the option of subsequent assembly operations. For example, screw pressing, riveting, etc. Thanks to the strong background of our partner EAP, we are also able to develop fully automatic equipment according to customer requirements.

Special applications

In our series production, we apply a special material called Collophon 507. It is a material that is applied to aluminum castings and its purpose is to reduce noise and vibrations in the car cabin. This process is again facilitated by our company's strong background - 3D printing and development.

Our customers can also contact us with less common requirements. We are ready to accommodate and help solve their specific problems. We often perform various surface treatment tests or paint parts with special products.

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Quality

In our laboratory, we constantly monitor the quality of chemical baths. This guarantees their optimal effect. On a daily basis, we measure the thickness of the surface layer or critical diameters with a cavity meter; surface tension, check degreasing and, of course, measure the content of titanium or silicon using RFA measurement. In this way, we can teach the reproducible quality of our products.

Compliance with the requirements of the IATF 16949 standard as well as meeting the specific requirements of our customers and their standards is a matter of course for us:

TL 82428
DBL 4918 / DBL 4952
N 10295

STJLR 50.5002
PTL 7555
DBL 1171 / DBL 1175

We are also holders of ISO 14001, TISAX AL1 certifications and are planning to obtain ISO 45001 certification.

Environmental protection plays a very important role here.

Environmental protection plays a very important role for us. All technologies are selected and designed with a view to minimizing environmental impacts. Our technology also includes our own wastewater disposal station. Hazardous waste is properly disposed of by contractual partners.

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Logistics services

It goes without saying that we provide logistics services to our customers. Primarily, these are direct deliveries to manufacturing plants – OEMs – car manufacturers. Specific customer requirements for packaging, marking or traceability of parts are consistently followed and respected. Everything is done through the logistics system APLS or WebEDI / EDI developed by us.

We have sufficient storage space and are able to "hold" a safety stock for our customers. No parts are stored outdoors. The loading ramps are covered and the quality of the parts is not compromised in bad weather.

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