A new topcoat - and even more innovation

The new topcoat from DÖRKEN, DELTA-PROTEKT^® TC 502 GZ stands out thanks to the fact that it has a very narrow friction coefficient window, it is PFAS-free and it ensures strong process stability. This silver, water-based topcoat is therefore ideal for components with metric threads, such as bolts and nuts, and meet the demands made by customers for a topcoat of this kind.

In combination with a basecoat, DÖRKEN’s latest solution offers effective corrosion protection with additional multifunctional properties, and also provides cathodic corrosion protection. Here, the less noble zinc contained in the coating sacrifices itself in favour of the more noble steel, thereby ensuring that the component remains protected, even if the coating is damaged, as the zinc dissolves more rapidly. Whilst the basecoat is primarily responsible for protection against corrosion, other properties that are important for a wide variety of components can be added via the topcoat.

The very narrow friction coefficient window and high process stability ensure that processes always proceed in the same way to guarantee consistently high-quality results. This makes processes easier to plan, more efficient and less susceptible to unforeseen events. DÖRKEN also bears sustainability in mind with the new topcoat. By avoiding per- and polyfluoroalkyl substances (PFAS), the company is specifically thinking about the future of the coating industry as well as the environment.

An innovative collaboration

But innovation is more than just developing new product solutions. When it comes to coating technology, DÖRKEN also works closely with its partners, for example, the companies EJOT and WMV Apparatebau.

EJOT, a specialist in fastening technology, was looking for a standard for coating bolts with internal drives. In the case of the micro bolts, which are used in a large range of industries, coating accumulations occurred in the drives from time to time, and this had a negative effect on the bit accessibility of the bolts. As a result, safe assembly was not necessarily ensured.

The collaborative efforts of the companies EJOT, DÖRKEN and WMV, a plant manufacturer specializing in surface treatment, took many years. But the time invested paid off in the end: A new type of coating system, in which the parts are ideally coated, was created. The system, called PULZ^®, operates with a permanent circulation of the components, which are thus coated evenly and with thin layers. It is the first system in the world that can coat 120 kilograms of material at 32 g acceleration with a change in position. In addition, optimization has made it possible to establish a process in which CO₂ emissions are reduced by 30 per cent compared to before.

Be it new coating solutions or new innovations in plant engineering - wherever there are innovations in the field of coatings, DÖRKEN is not too far away. Always close to the customer, always with sustainability in mind.