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Article

Influence of SiO2 Content and Exposure Periods on the Anticorrosion Behavior of Epoxy Nanocomposite Coatings

1
Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P. O. Box 800, Riyadh 11421, Saudi Arabia
2
Electrochemistry and Corrosion Laboratory, Department of Physical Chemistry, National Research Centre, El-Behoth St. 33, Dokki, 12622 Cairo, Egypt
3
SABIC Polymer Research Center (SPRC), Chemical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
4
Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(2), 118; https://doi.org/10.3390/coatings10020118
Received: 27 November 2019 / Revised: 23 January 2020 / Accepted: 26 January 2020 / Published: 31 January 2020
Epoxy coating formulations containing 1%, 3%, and 5% SiO2 nanoparticles were produced and applied on a mild steel substrate to achieve the objective of high performance corrosion resistance. The electrochemical impedance spectroscopy (EIS) technique was employed to measure the anticorrosive properties of coatings. The corrosion tests were performed by exposing the coated samples in a solution of 3.5% NaCl for different periods of time, varied from 1 h and up to 30 days. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) analyses revealed the presence of nanoparticles in the final cured samples. Establishing the incorporation of the nanoparticles in the coating formulations was confirmed by employing both of XRD and FT-IR techniques. The FT-IR spectra have proved to be satisfactory indicating that there was a complete reaction between the epoxy resin with the hardener. EIS measurements confirmed that the presence and the increase of SiO2 nanoparticles greatly improved the corrosion resistance of the epoxy coating. The highest corrosion resistance for the coatings was obtained for the formulation with 5% SiO2 nanoparticles content, particularly with prolonging the immersion time to 30 days. View Full-Text
Keywords: epoxy; nanoparticles; anticorrosion; EIS; coatings epoxy; nanoparticles; anticorrosion; EIS; coatings
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MDPI and ACS Style

Alam, M.A.; Samad, U.A.; Sherif, E.-S.M.; Poulose, A.M.; Mohammed, J.A.; Alharthi, N.; Al-Zahrani, S.M. Influence of SiO2 Content and Exposure Periods on the Anticorrosion Behavior of Epoxy Nanocomposite Coatings. Coatings 2020, 10, 118. https://doi.org/10.3390/coatings10020118

AMA Style

Alam MA, Samad UA, Sherif E-SM, Poulose AM, Mohammed JA, Alharthi N, Al-Zahrani SM. Influence of SiO2 Content and Exposure Periods on the Anticorrosion Behavior of Epoxy Nanocomposite Coatings. Coatings. 2020; 10(2):118. https://doi.org/10.3390/coatings10020118

Chicago/Turabian Style

Alam, Mohammad Asif, Ubair Abdus Samad, El-Sayed M. Sherif, Anesh Manjaly Poulose, Jabair Ali Mohammed, Nabeel Alharthi, and Saeed M. Al-Zahrani. 2020. "Influence of SiO2 Content and Exposure Periods on the Anticorrosion Behavior of Epoxy Nanocomposite Coatings" Coatings 10, no. 2: 118. https://doi.org/10.3390/coatings10020118

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