1. Durable superhydrophobic silica/epoxy resin coating for the enhanced corrosion protection of steel substrates in high salt and H2S environments.
- Author
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Zeng, Qiao, Kang, Lei, Fan, Jiang, Song, Longfei, Wan, Shan, Liao, Bokai, and Guo, Xingpeng
- Subjects
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EPOXY coatings , *EPOXY resins , *STEEL corrosion , *CONTACT angle , *SUPERHYDROPHOBIC surfaces , *CORROSION resistance - Abstract
A superhydrophobic coating composed of epoxy on the bottom and siloxane-modified silica on the top was prepared by employing the scraping and spraying methods. The superhydrophobic coating possesses excellent mechanical properties, is superhydrophobic (water contact angle, WCA = 164.3°), and has low adhesion. The long-term corrosion resistance of the epoxy coating and the superhydrophobic coating in a 3.5 % NaCl solution and hydrogen sulfide environment was assessed using electrochemical impedance spectroscopy (EIS), polarization curve analysis, immersion testing, and X-ray diffraction (XRD). Test results indicate that the superhydrophobic coating has excellent anti-corrosion capability in an H 2 S environment for 50 days and in a 3.5 % NaCl solution for 60 days. This is of great significance for developing the potential applications of superhydrophobic coatings in H 2 S environments. [Display omitted] • Epoxy resin and superhydrophobic surface combination for carbon steel substrate protection. • The coating showed anticorrosive effect in 3.5 % sodium chloride solution. • Superhydrophobic surface has excellent corrosion resistance in H 2 S environment of alternating temperatures and humidities. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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