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Recent Patents on Corrosion Science
ISSN (Print): 2210-6839
ISSN (Online): 1877-6108
VOLUME: 2
ISSUE: 1
DOI: 10.2174/2210683911202010022









Protective Coatings for Porcelain Insulators

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Author(s): Dachamir Hotza
Pages 22-29 (8)
Abstract:
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.
Keywords:
Coatings, films, glazes, hydrophobic, hydrophilic, insulators, photocatalytic, porcelain, semiconducting.
Affiliation:
Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040- 900 Florianópolis, SC, Brazil