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Anticorrosive performance of commercial nanoceramic coatings on AISI 1010 steel

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Anticorrosive performance of commercial nanoceramic coatings on AISI 1010 steel

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Título Anticorrosive performance of commercial nanoceramic coatings on AISI 1010 steel
Autor Baldin, Estela Knopp Kerstner
Kunst, Sandra Raquel
Beltrami, Lílian Vanessa Rossa
Ortega Vega, Maria Rita
Scienza, Lisete Cristine
Malfatti, Célia de Fraga
Abstract The aim of this work was to study the corrosion behavior of three commercial nanoceramic coatings in comparison to zinc phosphate coatings applied on mild steel (SAE 1010). The coatings were evaluated by scanning electron microscopy (SEM), profilometry and hydrophobicity. The electrochemical behavior was evaluated by dynamic polarization. The results showed that the samples coated with nanoceramics presented contact angles greater than 100°, achieving hydrophobic behavior. Evaluating the electrochemical behavior under dynamic polarization revealed that the nanoceramic coating containing chromium (CHT) exhibited a higher corrosion potential and lower current than the other nanoceramic coatings tested, although its performance in a dilute sodium chloride solution was below that of the zinc phosphate-based coating. Although the nanoceramic coatings exhibited poor electrochemical behavior compared to the zinc-based coatings, they had a higher corrosion resistance when associated with an organic coating.
Contido em Materials research : ibero-american journal of materials. São Carlos. Vol. 17, no. 6 (Nov./Dec. 2014), p. 1497-1506
Assunto Aço
Corrosao
Fosfato de zinco
Revestimento nanocerâmico
[en] Corrosion
[en] Nanoceramic coatings
[en] Steel
[en] Zinc phosphate
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/115572
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