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RENEWABLE ENERGY
Coatings manufacturer Dörken is taking up this challenge in a joint project with Peiner Umformtechnik, a manufacturer of bolt sets for the wind industry. The firm’s bolt sets – which consist of a bolt, a washer and a nut – must withstand extreme weather conditions during daily use. After months of intensive cooperation, the two companies have found a way to solve this challenge.
basecoat is applied directly to the component and determines the corrosion protection properties of the coating. The topcoat increases the corrosion protection and ensures that corrosive media such as water or salt are kept away from the surface. The topcoat is also responsible for resistance to mechanical and chemical stresses as well as abrasion. When coating bolts, a defined coefficient of friction can also be set.
Such a topcoat now also improves the bolt sets from Peiner Umformtechnik. After numerous trials and extensive tests, a product was defined that perfectly complements the company’s hotdip galvanised bolt sets. The hotdip galvanisation provides protection against corrosion, while the Dörken’s zinc flake topcoat, which is applied on top of it, is responsible for a secure bolt connection of the nut due to adjusted coefficients of friction. This is done without removing any of the hotdip galvanised layer. Thanks to this coating, the coefficients of friction are kept stable regardless of weather conditions. The combination of hotdip galvanising and topcoat achieves precisely those properties that are required in the wind energy industry.
Zinc flake coatings
For decades, Dörken’s zinc flake coatings have been deployed for a wide variety of applications in different industries. Such a system usually consists of a basecoat and a topcoat. The www.doerken.com
The solution has not only proven to be a success under laboratory conditions, with various test series also being carried out in the field. In the meantime, millions of sets have been delivered and installed, with excellent process reliability on construction sites.
