Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 75, Issue -, Pages 178-186Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.03.021
Keywords
Sb-SnO2 nanoparticles; Polypyrrole coating; Hydrophobicity; Self-healing; Physical properties; Corrosion
Funding
- National Science & Technology Pillar Program during the Twelfth Five-year Plan Period for Seawater Desalination Technology [2015BAB08B00]
- Natural Science Foundation for Young Scholars of Jiangsu Province, China [BK20160983]
- National Key RD Plan [2017YFC0404100]
- National Natural Science Foundation of China [21605084, 51808254]
- Jiangsu Province Natural Science Foundation for Young Scholars of China [BK20160983, BK20170111]
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Polypyrrole (PPy) coatings were successfully electrosynthesized on the carbon steel by embedding SnO2 and Sb-SnO2 nanoparticles (NPs). The associated structural, morphology, hydrophobic, physical properties, anti-corrosion and self-healing performance of these coatings were systematically studied by several tests. XRD results showed that SnO2 had a tetragonal rutile structure and the lattice parameters indicated that Sb ions were successful substituted into SnO2 lattice. The average size of SnO2 NPs was decreased by the incorporation of Sb-SnO2 NPs, which were found through TEM images. The contact angle test showed that the hydrophobic of PPy coatings was greatly enhanced by the incorporation of Sb-SnO2 NPs. SEM results revealed that Sb-SnO2/PPy coating exhibited a more compact and uniform surface than SnO2/PPy coating, hence the physical barrier effect was significantly strengthened. The electrochemical measurements confirmed the excellent anti-corrosion and self-healing ability of Sb-SnO2/PPy coating for a long immersion time in HCl solution. The superior anti-corrosion performance of Sb-SnO2/PPy coating was ascribed to the synergistic effects of the anodic protection combined with the self-healing effect, the excellent physical barrier effect with compact, smooth and hydrophobic coating surface as well as the formation of p-n junction with decreased charge transfer. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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