No abstract

The corrosion inhibition efficiency (IE) of an aqueous extract Allium cepa (onion) in controlling the corrosion of carbon steel ground water in absence and presence of with Zn 2+ has been studied by weight loss method. The formulation consisting of 3 mL Allium cepa extract, 50 ppm of Zn 2+ and 50 ppm of sodium pattassium tartarate which offers 97% inhibition efficiency. The synergistic effect exists between onion-Zn 2+-tartarate system. The addition of N-cetyl-N,N,Ntrimethylammonium bromide on onion-Zn 2+-tartarate system does not change the excellent inhibition efficiency. Polarization study shows that the onion-Zn 2+-tartarate system functions as a cathodic inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. The UV fluorescent spectra indicate the possibility of formation of Fe 2+-onion complex and also Zn 2+-onion complex in solution. Thus the protective film is found to be UV fluorescent.

The current research work attempted to investigate the strontium oxide nanoparticles (SrONPs) synthesized from the Lantana camara leaf extract. The bio-synthesized strontium nanoparticles were characterized by a UV-Visible spectrometer, Fourier Transform Infra-Red spectra (FTIR), Scanning Electron Microscope, X-Ray diffraction, and Dynamic Light Scattering. The biomolecules in the extraction of plant leaves behaved as good reducing and capping agents. The XRD peaks are indexed to 13.020, 22.240, 25.940, 31.310, 34.000, and 40.910, and the corresponding planes are (101), (112), (202), (213), (310), and (312) representing cubic structure for SrNPs. The strontium nanoparticles are unevenly globular in shape, and chaos, and exhibited cluster and partially even surfaces shown from the Scanning Electron Microscope. The antibacterial assay of the synthesized Lantana camara strontium oxide nanoparticles was evaluated. The binding effect was more at higher concentrations (100 µl) than the control for the species E. coli (21 mm), and A. niger (20 mm).

No abstract