12 research outputs found
A case of nasal myiasis due to Oestrus ovis (Diptera: Oestridae) in a llama (Lama glama)
Potassium Iodide as a Corrosion Inhibitor of Mild Steel in Hydrochloric Acid: Kinetics and Mathematical Studies
Alternating current oxidation of Ti–6Al–4V alloy in oxalic acid for corrosion resistant surface finishing
Inhibition of mild steel corrosion in HCI solution using chitosan
The efficiency of chitosan (a naturally occurring polymer) as a corrosion inhibitor for mild steel in 0.1 M HCl, was investigated by gravimetric, electrochemical and spectroscopic measurements (SEM observations and UV-visible analysis). The polymer was found to inhibit corrosion even at a very low concentration. Inhibition efficiency increases with a rise in temperature up to 96 % at 60°C and then drops to 93% at 70°C, while it slightly increases with an increase in chitosan concentration. Polarization curves indicate that chitosan functions as a mixed inhibitor, affecting both cathodic and anodic corrosion reactions. Impedance results indicate that chitosan was adsorbed on the metal/solution interface. Adsorption of chitosan at the mild steel surface is found to be in agreement with Langmuir adsorption isotherm model. Chemical adsorption is the proposed mechanism for corrosion inhibition considering the trend of protection efficiency with temperature. Calculated kinetic and thermodynamic parameters corroborate the proposed mechanism.Fil: Umoren, Saviour E.. University of Uyo. Faculty of Science; Nigeria. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico la Plata. Instituto de Investigaciones FisicoquĂmicas TeĂłricas y Aplicadas; ArgentinaFil: Banera, Mauro. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico la Plata. Instituto de Investigaciones FisicoquĂmicas TeĂłricas y Aplicadas; ArgentinaFil: Alonso Garcia, Teodoro. Biosurfaces Unit, Cic BIOMAGUNE; EspañaFil: Gervasi, Claudio. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico la Plata. Instituto de Investigaciones FisicoquĂmicas TeĂłricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Mirifico, Maria Virginia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico la Plata. Instituto de Investigaciones FisicoquĂmicas TeĂłricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentin