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Report RSE 18000042

Hydrophobic and anti-icing coatings for electrical insulators and conductors:preparation and characterization

Anti-ice coatings are applied to conductoris and guard cables. Processes are developed in laboratory and applied on samples for outdoor winter testing. Characterization of materials and coatings. Development of anti-fuoling coatings for insulators.

The issue of anti-ice coatings for electrical components and conductors and anti-fouling coatings forinsulators is of undoubted relevance to the electrical system, from the point of view of its resilience toclimate events and of the huge economic impact due to structures restoration and disservice costs.The report describes the research activities carried out on anti-ice coatings for conductors and guardcables and on hydrophobic coatings for insulators. In this period, the activities were focused on settingup field tests, i.e. the preparation of rope samples, guard ropes, conductors and slabs with anti-icecoating that have been exposed for the winter season at the WILD station of RSE (Vinadio, CN) and atthe Malga Ciapela station (BL). The activity took advantage of the collaboration with TERNA, with themanufacturing companies TRATOS CAVI and De Angeli, and with CNR-ISTEC of Faenza.

The goal of preparing ropes of 15 meters (for the WILD station) and 120 meters (for the Malga Ciapelastation) in time for the winter 2017-2018 imposed to exceed the scale of laboratory tests to get toprocesses and methods compatible with the prototype scale and in an industrial perspective. Tools andmethods as well as process details have consequently been settled and optimized with particularattention to practicality on a prototype and industrial scale, simplicity and costs. Laboratory, study andcharacterization activities were mainly aimed at supporting the preparation of samples to be testedoutdoor. The materials studied are those present on the external surface of the conductors and ropes, i.e.pure aluminum and Anticorodal alloy.

The development activities of hydrophobic or hydrophilic coatings for glass insulators continued, withthe aim of obtaining coatings of different degree of hydrophobicity, well adherent, resistant to aging.The research was focused on the development of both hydrophobic and hydrophilic coatings and onpreliminary treatments of surfaces aimed at increasing the adhesion of such coatings onto glass.

Finally, an exploratory study was started to evaluate the possibility of installing an artificial snowlaboratory to perform indoor tests throughout the year, under controlled conditions.

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