Recent Patents on Corrosion Science

Oleg L. Figovsky  
R&D of International Nanotechnology Research Centre
Migdal HaEmek


Protective Coatings for Porcelain Insulators

Author(s): Dachamir Hotza

Affiliation: Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040- 900 Florianópolis, SC, Brazil

Keywords: Coatings, films, glazes, hydrophobic, hydrophilic, insulators, photocatalytic, porcelain, semiconducting.


This review presents a selection of patents reported on coatings for high-voltage porcelain insulators. An insulator is subject to surface corrosion due to air pollution or salt deposition, which may form a conductive electrolytic solution. This may cause a flashover and shut down the transmission and distribution electrical energy line, particularly in high polluted or coastal regions. The main goal of protective coatings has been to produce flashover-free high-voltage insulators. Coating porcelain insulators with specific inorganic or organic may prevent the leakage current. Major approaches are based either on semiconducting glazes or hydrophobic coatings.

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Article Details

Page: [22 - 29]
Pages: 8
DOI: 10.2174/2210683911202010022