Abstract
The influence of 3-mercaptopropyltrimethoxysilane (MPTMS)/WC nanoparticles within the neat epoxy (EP) coated mild steel was investigated for its hydrophobic, mechanical and electrochemical properties in the marine environment. The MPTMS modified WC nanoparticles were confirmed by TGA, XRD, SEM/EDX, AFM and TEM to investigate the chemical structure. The electrochemical techniques (EIS, SECM and Polarization) were utilized to investigate the protective properties of the investigated coatings. The FE-SEM/EDX and XRD were carried out to examine the nature of the corrosion products. The water repellent property of EP, EP/WC, EP/MPTMS, and EP-MPTMS/WC coatings was characterized by contact angle measurement (CA). It was found that the coating resistance of the EP-MPTMS/WC nanocomposite is over 41% higher than that of the pure epoxy coating. The coating resistance of the EP-MPTMS/WC coated steel was found to be 5699.76 kΩ.cm2 whereas the coating resistance of EP was 1.11 kΩ.cm2 even after 240 h exposed to the marine environment. Similarly, the corrosion current density of the EP-MPTMS/WC nanocomposite coated steel obtained by SECM technique was 2.1 nA/cm2 in comparison to EP coated steel (14.4 nA/cm2). The results showed that the newly developed EP-MPTMS/WC nanocomposite coating possessed superior corrosion protection and enhanced hydrophobic behaviors (WCA: 144°). The investigated coatings showed profound mechanical properties. Therefore, the compatibility of EP, MPTMS and WC nanoparticles was established by superior hydrophobicity and improved corrosion protection and enhanced mechanical properties.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Joseph Raj Xavier: Visualization, Conceptualization, Methodology, Resources, Validation, Formal analysis, Investigation, Writing – original draft, Writing – review & editing.
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Xavier, J.R. Superior Surface Protection, Mechanical and Hydrophobic Properties of Silanized Tungsten Carbide Nanoparticles Encapsulated Epoxy Nanocomposite Coated Steel Structures in Marine Environment. Silicon 14, 11147–11161 (2022). https://doi.org/10.1007/s12633-022-01842-0
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DOI: https://doi.org/10.1007/s12633-022-01842-0