Anticorrosive Performance of Commercial Nanoceramic Coatings on AISI 1010 Steel

作者：Kerstner Estela Knopp^*; Kunst Sandra Raquel; Rossa Beltrami Lilian Vanessa; Ortega Vega Maria Rita; Scienza Lisete Cirstina; Malfatti Celia de Fraga

来源：Materials Research, 2014, 17(6): 1497-1506.

DOI：10.1590/1516-1439.263514

• corrosion
• steel
• nanoceramic coatings
• zinc phosphate

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 degrees, 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.

• 出版日期2014-12