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AUTHOR(S): Prakash Kumar, Rajesh Baitha, Mukesh Kumar, Shikandar Prasad, Anand Prakash, Raushani Suman
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ABSTRACT This study focuses on formulating polymer nanocomposite solutions based on polydimethylsiloxane (PDMS) and nanofillers (ZnO and SiO2) for coating galvanized iron (GI) via the sol-gel dip coating method, with a particular emphasis on investigating their corrosion resistance. Various weight percentages (0, 2, 4, 6, 8, and 10) of nanofillers are incorporated into PDMS and xylene solutions to create the nanocomposite coating solution. The resulting solutions are applied onto GI substrates and subjected to characterization using scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS) and Fourier-transform infrared spectroscopy (FTIR), followed by assessments of wettability and electrochemical responses. SEM with EDS and FTIR analysis reveals surface morphology and chemical composition of the coated surfaces, identifying Si-O-Si groups at 1088 cm-1. Wettability studies ascertain the hydrophobicity of the coatings. Electrochemical analysis demonstrates a reduction in corrosion rate with increasing contact angle. Remarkably, the coating containing 10% nanofillers exhibits the highest contact angle and lowest corrosion rate, suggesting potential applications in the construction, marine, and naval sectors. |
KEYWORDS Sol-gel coating; Polydimethylsiloxane; Nanofillers; Hydrophobicity; Corrosion behavior |
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Cite this paper Prakash Kumar, Rajesh Baitha, Mukesh Kumar, Shikandar Prasad, Anand Prakash, Raushani Suman. (2025) Impact of Contact Angle on Corrosion Behaviour of Polydimethylsiloxane and Nanofillers Based Nanocomposite Coated Galvanized Iron. International Journal of Mechanical Engineering, 10, 103-111 |
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