NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (4), P. 711–723
Inhibition of corrosion of mild steel in well water by TiO2 nanoparticles and an aqueous extract of May flower
P. Nithyadevi – PG and Research Department of Chemistry, GTN arts College, Dindigul–624005, India
R. Joseph Rathish – PSNA College of Engineering and Technology, Dinidgul, India
J. Sathiya Bama – PG and Research Department of Chemistry, GTN arts College, Dindigul–624005, India
S. Rajendran – Corrosion Research Centre, Department of Chemistry, RVS Educational Trust’s Group of Institutions, Dindigul–624005, India; susairajendran@gmail.com
R. Maria Joany – Sathyabama University, Chennai, India
M. Pandiarajan – PG and Research Department of Chemistry, GTN arts College, Dindigul–624005, India
A. Anandan – SKV Higher Sec School, Kandampalayam–637201, India
Titanium dioxide nanoparticles have been used to control corrosion of mild steel in well water in the absence and presence of an aqueous May flower extract. As the concentration of TiO2 increases, the inhibition efficiency also increases. 100 ppm of TiO2 offers 84 % inhibition efficiency. The addition of 10mlof May flower extract enhances the inhibition efficiency to 95 %. Adsorption of TiO2 on the metal surface follows Langmuir adsorption isotherm. Polarization study reveals that the flower extract-TiO2 system functions as mixed type of inhibitor, controlling both anodic and cathodic reactions. AC impedance spectra reveal the formation of a protective film on the metal surface. This technology may find application in cooling water systems and concrete technology.
Keywords: corrosion inhibition, nanoparticles, TiO2, flower extract, Delonix regia, adsorption isotherm.
PACS 81.07.-b
DOI 10.17586/2220-8054-2016-7-4-711-723
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