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ETH Zürich Rämistrasse 101 8092 Zürich, Switzerland http://www.hk.ethz.ch
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ETH Zürich

Neuartige Beschichtung verhindert Kalkablagerung

Wo heisses Wasser fliesst, ist der Kalk nicht weit / In Haushalten ist das lästig, in thermischen Kraftwerken ein teures Problem / Jetzt haben ETH-​Forschende eine Lösung dafür gefunden

(PresseBox) (Zürich, )



ETH-​Forschende entwickeln auf der Basis eines Hydrogels eine Beschichtung, die die Anhaftung von Kalk wirkungsvoll verhindert.
Kalkkristalle finden auf dieser Oberfläche keinen Halt und werden durch die umgebende Wasserströmung weggetragen.
Eine solche Beschichtung würde die Effizienz der Stromproduktion in thermischen Kraftwerken verbessern und den Verlust, der durch Kalkbeläge entsteht, ausgleichen.


Heisswassertanks, Waschmaschinen, Wasserkocher – jedes Haushaltsgerät, das mit (heissem) Wasser in Kontakt kommt, verkalkt, besonders in Gegenden mit hartem, also kalkreichem Wasser. Oft hilft dann nur der Griff zum Essig oder Spezial-​Entkalker, um den steinharten Belag aufzulösen und das Gerät wieder funktionstüchtig zu machen.

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