Abstract
SiO2-Al2O3 mixed oxide nanoparticles were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometry (XRD) analysis. The anticorrosion behaviour of PU/SiO2-Al2O3 nanocomposite coating was investigated by SECM, polarization studies and EIS for 1 h, 240 h, 480 h, and 720 h of immersion in 3.5% NaCl solution. EIS studies showed a pronounced protection performance for PU/SiO2-Al2O3 coating in 3.5% NaCl. SECM analysis measured lower current for the PU/SiO2-Al2O3 at the scratch of the coated surface compared to PU coating. Dynamic mechanical analysis (DMA) test provided valuable information about the protective performance of the PU/SiO2-Al2O3 nanocomposite coated surface. The formation of thin films of oxides and chlorides of Si and Al blocks the penetration corrosive ion in the coating/metal interface was investigated by FE-SEM/EDX. It was revealed that the mixed oxide nanoparticles (SiO2-Al2O3) enhanced mechanical as well as barrier properties of the polyurethane coating against corrosion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
