Performance evaluation of ceramic insulators coated with titanium dioxide films to reduce soiling




titanium dioxide, ceramic insulators, atmospheric soiling


The soiling of in-service electrical insulators exposed to the atmosphere is a major problem in power transmission lines. Several inorganic and organic particulate materials are deposited on insulator surfaces forming a layer that could become conductive in the presence of moisture. This produces different phenomena that could deteriorate the insulating properties of the material and eventually lead to its rupture, affecting the electrical energy supply. Currently, a method based in the application of a titanium dioxide film is being developed. This method tries to minimize the pollution accumulation on the porcelain insulators without affecting their electrical properties. In this work the performance of two different thicknesses of the coating film on the porcelain insulators was evaluated by means of contact angle, adhesion, leakage current, dry-flashover voltage and erosion laboratory tests. Finally, the in-service behavior of coated and no-coated insulators installed in a power transmission tower was evaluated. The coated insulators showed a good performance in the laboratory tests. Moreover, before 5 months of exposure in the energized power line, a decrease in the soiling was observed.

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Author Biographies

Lorena E. Correa, University of Antioquia

Corrosion and Protection Group-CIDEMAT.

Esteban Velilla, University of Antioquia

Research group on Efficient Management of Electrical Energy.

Maryory Gómez, University of Antioquia

Corrosion and Protection Group-CIDEMAT.

Félix Echeverría, University of Antioquia

Corrosion and Protection Group-CIDEMAT.

Alejandro Marín, Departamento de Líneas de Alta Tensión Bogotá

Department of High Voltage Lines.

Juan G. Castaño, University of Antioquia

Corrosion and Protection Group-CIDEMAT.


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How to Cite

Correa, L. E., Velilla, E., Gómez, M., Echeverría, F., Marín, A., & Castaño, J. G. (2013). Performance evaluation of ceramic insulators coated with titanium dioxide films to reduce soiling. Revista Facultad De Ingeniería Universidad De Antioquia, (66), 131–140.

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