Coating
POWDER COATING
At WIEGEL, powder coating not only ensures long-lasting corrosion protection, but also gives materials a high-quality, aesthetic upgrade – through extensive colour palettes and an exceptionally durable coating. This method is suitable for a wide range of applications, particularly in technical, architectural, and design fields.
What is powder coating?
Finely ground pigment and resin particles are electrostatically applied to surfaces – usually made of aluminium or steel – and then cured in an oven. The result is a uniform, durable protective layer. As the process uses no liquid carriers, no evaporation occurs – this increases durability and reduces emissions.
Application methods
Powder coating is applied to a wide range of materials. The method is particularly robust as it contains no solvents, making the coating more durable than conventional paints. It is mainly used for the functional and aesthetic enhancement of metal surfaces.
For maximum protection, WIEGEL combines proven hot-dip galvanizing with a high-quality coating. The duplex system merges long-lasting corrosion protection with versatile colour design – technically robust and visually impressive.
WET COATING
In addition to high-quality powder coating, WIEGEL also offers professional wet coating for demanding metal surfaces – precise, flexible, and optimally tailored to individual customer requirements.
What is wet coating?
In wet coating, special coating materials in liquid form are applied to the surface to be protected. Once dried, they form a solid, protective layer. This film formation creates a long-lasting and reliable surface protection.
Application methods
The coating material is mainly applied manually using a spray gun, supported by application pumps (Airless, Airmix, or electrostatic). This method enables particularly precise and even coating – even for complex part geometries.
Process
Pre-treatment
(Powder) coating
(Wet) coating
Curing / Drying
Overview of Paint Types
Epoxy resin coatings
Epoxy resin coatings offer excellent chemical resistance and adhesion, making them ideal for indoor areas and as a primer, but they are not UV-resistant.
Polyurethane coatings
Polyurethane coatings are characterized by excellent weather and UV resistance as well as good mechanical properties. They are commonly used in high-quality outdoor projects and serve as a topcoat system.
Water-based coatings
Water-based coatings (hydro paints) feature an environmentally friendly profile, low solvent content, and a favorable VOC balance – all without compromising quality.
Duplex System: Hot-Dip Galvanizing and Coating
For maximum corrosion protection, we offer a combination of hot-dip galvanizing and coating (duplex system).
The galvanizing process is already optimized with the subsequent coating in mind. After galvanizing, the parts are stored in a protected environment and then professionally coated. The result: a service life that exceeds the sum of the two individual systems (in accordance with DIN 55634 – A.6 and A.7).
Sustainability and Environmental Protection
By using modern water-based paints and efficient application methods, solvents and emissions are significantly reduced. This way, WIEGEL actively contributes to sustainable surface protection even in the field of wet coating.
Your Benefits at a Glance
Individually adaptable and environmentally friendly coating solutions
High-quality corrosion protection with long-lasting appearance
Suitable even for complex geometries and custom-made parts
Duplex system for maximum protection durability
Thanks to our skilled on-site personnel and the use of high-quality coating systems, we achieve consistently impressive results – with effective protection against weathering and corrosion.
The WIEGEL Group employs personnel with FROSIO Level III certification as well as DIN-certified coating inspectors. This enables global paint inspections in accordance with recognized international standards. For further information, our contacts at WIEGEL will be happy to assist you.
Our Coating Locations at a Glance
PBH Höchstadt (Powder coating)
WIEGEL Isseroda (Powder coating)
WIEGEL Zittau (Powder coating)
WIEGEL Velké Meziříčí (Wet coating)
FAQ
Which coating processes does WIEGEL offer?
Depending on the site, we offer powder or wet coating for steel and aluminum products – including coordinated pretreatment. This enables the WIEGEL Group, working as an integrated network, to meet and implement all corrosion protection requirements.
What is meant by a duplex system?
This refers to the combination of hot-dip galvanizing and coating; the galvanizing process is designed with the subsequent coating in mind. The resulting protection period exceeds the sum of the individual processes. Depending on the system, the extension factor is up to 2.5 (anchored, among others, in DIN 55634, A.6/A.7). Both systems protect each other.
Which pretreatment does WIEGEL use?
Mechanical (e.g., blasting) or wet-chemical pretreatment – always focusing on clean, grease-free surfaces for maximum adhesion and service life. “Sweep blasting” is the pretreatment process on hot-dip galvanized surfaces. Sweep blasting is carried out at a much lower pressure than sandblasting. Because the WIEGEL Group can offer various pretreatment methods, the right process can be selected for the customer’s intended application.
What visual options are available?
A wide color palette and high-quality, uniform surfaces for functional through to architectural applications. In addition, surfaces can be provided in the following five gloss levels: high gloss, gloss, semi-gloss, satin matt and matt. These can also be measured after application using a gloss meter, so the customer receives exactly the desired result.
Are the processes suitable for complex geometries/small series?
Yes. WIEGEL reliably coats demanding geometries as well as single parts and small batch sizes. In such cases, certain areas must be “pre-painted” to ensure corrosion protection and appearance also in areas the application equipment cannot reach.
Which paint systems are used?
Depending on requirements, among others epoxy resin coatings (chemical resistance, often as primer/indoor use) and polyurethane coatings (UV/weather resistance, top coat for outdoor use). We also use water-based coatings with a low environmental impact and low VOC content.
How does WIEGEL ensure sustainability in coating?
Efficient application and modern water-based coatings reduce solvents/VOCs; the processes are designed to conserve resources. In addition, special drying systems reduce drying times and thus save energy. Our in-house power generation at selected sites further enhances energy savings.
How is a uniform coating thickness ensured?
Powder or wet coating is applied manually or automatically with the aim of achieving a homogeneous film thickness – even in hard-to-reach areas. Finally, it is checked non-destructively using a coating thickness gauge. At WIEGEL, we are also able to measure both the zinc and paint layer thickness simultaneously using a special measuring device.
What must be considered in a duplex system regarding the galvanizing/coating interface?
After galvanizing, components are stored in a protected manner and properly prepared for coating; the entire process chain is coordinated from a single source. To avoid white rust, components must be stored dry immediately after galvanizing. Transport under a tarpaulin must also be ensured.
Are qualified contacts available?
Yes. The area is managed by a FROSIO Inspector Level III. DIN-certified coating inspectors are also available as contacts for corrosion protection matters. With these two solid qualifications, we are able to advise and support customers in the best possible way. Requirements are increasing continuously. That is why we keep training and are at your side whenever questions arise.
What does “VOC” stand for?
VOC stands for Volatile Organic Compounds. These are chemical substances that can easily be released from materials and enter the air. They are found in many everyday products, for example paints, cleaning agents, furniture, or new carpets. VOCs can affect air quality and may cause odors or health complaints. In short: VOCs are substances that escape from materials into indoor air.
We provide you with comprehensive advice. Get in touch with your nearest WIEGEL contact person.