Thursday - February 2, 2017

Productivity gain for Swedish corrosion protection service provider

Covestro increases the profitability of wind turbines

Pasquick™: fewer coats, greater efficiency, faster curing
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Corrosion protection specialist Alucrom AB used a coating system of just two layers from Hempel for an efficient and lasting protection of the gigantic steel towers for wind power plants. The topcoat is based on Pasquick™ technology by Covestro. By that the company contributes to a higher profitability of this renewable energy.

Wind power is among the most sustainable technologies for generating electricity and it is achieving tremendous growth rates worldwide. However, to fully exploit the potential of this renewable energy source, wind turbines need to become significantly more cost-efficient to manufacture and operate. One critical factor in this connection is the corrosion protection of the enormous steel components.

Swedish corrosion protection specialist Alucrom AB operates a major plant in Malmö for coating wind turbine components: in 2008 alone, steel towers with a surface area exceeding 300,000 square meters were blasted and coated. To satisfy the rising demand, Alucrom was in search of a cost-efficient and time-saving coating solution, and turned to the Danish coatings producer Hempel A/S for help.

Six steel towers a week
Hempel mastered the task by developing a coating system of just two layers, comprising a zinc epoxy primer and a topcoat based on Pasquick™ technology from Covestro. The technology and coating system passed all tests and Alucrom had been using them as a standard solution ever since. The company was now in a position to deliver six, gigantic steel towers a week to its customer Enercon Windtower Production AB.

With Pasquick™ technology, the number of coats can be reduced compared with the conventional process. The outer layer is thicker; Alucrom worked with a dry layer thickness of 320 micrometers. In addition, the coatings cure faster. Both factors help to further reduce the cycle time and manufacturing cost of wind turbines.

Lasting corrosion protection, low maintenance
The corrosion protection is just as long-lasting and high in quality as with the standard process. This is an important prerequisite for producing turbines with long service lives and minimal maintenance requirements and thus for the cost-effective use of wind energy.

The technology has advantages over conventional coatings even in ecological terms: Alucrom observed a significant reduction of some 30 percent in the emission of volatile organic components (VOC).

The collaboration between Alucrom and Enercon began in 2008 and ended in 2015, when the wind turbine manufacturer decided to apply the coatings itself. The outstanding results, however, are unchanged: efficient, lasting, low-maintenance corrosion protection for wind turbines.

Visit us at the European Coatings Show 2017 from April 4 to 6 in Nuremberg, Hall 4A, Stand 528.

About Covestro:
With 2015 sales of EUR 12.1 billion, Covestro is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. Covestro, formerly Bayer MaterialScience, has 30 production sites around the globe and as of the end of 2015 employed approximately 15,800 people (full-time equivalents).

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Forward-looking statements
This press release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s public reports which are available on the Covestro website at Covestro assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.