A study of corrosion protection efficiency of silica nanoparticles acrylic coated on mild steel electrode. (March 2019)

• Record Type: Journal Article
• Authors: Rajkumar, R.; Vedhi, C.
• Is Part Of: Vacuum. Volume 161(2019)
• Page Start: 1
• Page End: 4
• Publication Date: 2019-03
• Subjects: Silica nanoparticles -- Rice husk -- Acrylic coating -- Anticorrosion performance; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2018.12.005
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Silica nanoparticles (SNPs) were synthesized using rice husk by eco-friendly method. The physico-chemical characterization of SNPs was investigated by Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS). FT-IR spectrum shows the main characteristic peak of SiOSi at 468 cm −1 indicating the formation of SNPs. The XRD pattern revealed the formation of crystalline SNPs and the particle grain size value were found to be 5 nm. The surface morphology was observed by SEM. EDS result showed that the composition of silicon and oxygen in SNPs is found to be 47.54% and 28.24%, respectively. Acrylic coating containing SNPs was directly coated on the mild steel surface and the anticorrosive behavior was examined by polarization curve and electrochemical impedance spectroscopy in 1% HCl and 3.5% NaCl solution. It was found that silica/acrylic coating showed better corrosion protection efficiency as compared to that of pure acrylic coating. Silica/acrylic coating acted as good anticorrosive behavior for 3.5% of NaCl solution. Highlights: Synthesis of silica nanoparticles by vacuum condition. It act as a excellent protective layer on mild steel electrode. Silica nanoparticles is prepared from agricultural waste.