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Development of corrosion-resistant superhydrophobic coating on brass using modified silica nanoparticles

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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Abstract

In this study, SiO2 nanoparticles were modified using triethoxyoctylsilane to fabricate a corrosion-resistant superhydrophobic coating on brass. The brass substrate of 1 × 1 cm2 was cut from the bulk using an electrical discharge machine (EDM) that generated a micro-pattern on its surface then it was chemically etched with Piranha solution. In order to create nano roughness on the etched micro-patterned brass substrate and to reduce its surface energy, surface-modified SiO2 nanoparticles were coated on the brass using the solution-immersion approach followed by annealing. AFM and FESEM analysis of the coated brass showed the presence of SiO2 nanoparticles and their clusters leading to the superhydrophobicity. The coated brass exhibited a maximum water contact angle (CA) of 152° ± 2° and a sliding angle (SA) of 7° ± 3°. The electrochemical impedance spectroscopy (EIS) plots demonstrated a high impedance value for coated brass compared to uncoated brass. Conversely, the corrosion current density (Icorr) of coated brass (0.068 × 10−6 A cm2) is much lower than the uncoated brass (0.369 × 10−6 A cm2) signifying efficient corrosion resistance of the coated brass. The present work has inordinate potential to control the corrosion of metals in corrosive conditions.

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Author contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by KS, MKM, AC, SD, DSA and MSG. The first draft of the manuscript was written by KS and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Funding

This work was supported by University of Petroleum and Energy Studies (UPES), Dehradun under SEED Grant No. UPES/R&D/09032020/28. Author MSG has received research support from UPES.

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Authors and Affiliations

  1. School of Basic and Applied Sciences, Lingaya’s Vidyapeeth, old Faridabad, Haryana, 121002, India

    Konica Sharma & M. K. Malik

  2. Department of Applied Science, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India

    Amit Chawla & M. S. Goyat

  3. Department of Mechanical Engineering, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand, 248007, India

    Subhankar Das

  4. Department of Physics, Chaudhary Devi Lal University, Sirsa, Haryana, 125055, India

    Dharamvir Singh Ahlawat

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  1. Konica Sharma
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Sharma, K., Malik, M.K., Chawla, A. et al. Development of corrosion-resistant superhydrophobic coating on brass using modified silica nanoparticles. J Sol-Gel Sci Technol 105, 701–708 (2023). https://doi.org/10.1007/s10971-022-06018-1

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