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Inhibitive Effects of cis-2,6-Diphenyl-3-alkyl Piperidine at Aluminium/1 N Hydrochloric Acid Interface
Asian Journal of Chemistry,
Vol. 30 No. 8 (2018): Vol 30 Issue 8
Abstract
Three piperidine molecules viz., t-3-methyl-r-2,c-6-diphenylpiperidine (3MP), t-3-ethyl-r-2,c-6- diphenylpiperidine (3EP), t-3,c-5-dimethyl-r-2,c-6-diphenylpiperidine (DMP) were treated in different concentrations to decide their capability to inhibit the dissolution of aluminium in 1 N HCl. Gravimetric method, AC impedance (EIS) and potentiodynamic polarization techniques were employed to ascertain the corrosion of aluminium. The weight loss is found to be concentration and temperature dependent. The effect of temperature (303-333 K) was examined to find out the thermodynamic parameters like DH#, DS# and DGºads and activation parameter Ea. Polarization data revealed that the piperidine inhibitor molecules were mixed type. By using Nyquist plots the double layer capacitance and charge transfer resistance values were obtained. The impedance data proved the adsorption of inhibitor molecules on the aluminium surface. Surface coverage (q) parameter was found to fit Tempkin adsorption isotherm. Scanning electron microscopy and energy dispersive X-ray spectroscopy (EDS) were utilized to investigate the aluminium surface.
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References
F. Ovari, L. Tomcsanyi and T. Turmezey, Electrochim. Acta, 33, 323 (1988); https://doi.org/10.1016/0013-4686(88)85023-0.
L. Tomcsányi, K. Varga, I. Bartik, H. Horányi and E. Maleczki, Electrochim. Acta, 34, 855 (1989); https://doi.org/10.1016/0013-4686(89)87119-1.
S.S. Mahmoud, Port. Electrochim. Acta, 26, 245 (2007); https://doi.org/10.4152/pea.200803245.
A. Ilamparithi, S. Ponnuswamy and A. Selvaraj, Int. J. Appl. Nat. Sci., 3, 63 (2014).
S. Sankarapapavinasam, F. Pushpanaden and M.F. Ahmed, Corros. Sci., 32, 193 (1991); https://doi.org/10.1016/0010-938X(91)90043-O.
T. Ravindran and R. Jeyaraman, Indian J. Chem., 31B, 677 (1992).
V. Maheshwaran, S. Abdul Basheer, A. Akila, S. Ponnuswamy and M.N. Ponnuswamy, Acta Crystallogr. Sect. E Struct. Rep. Online, 69, 1371 (2013); https://doi.org/10.1107/S1600536813020382.
C.R. Noller and V. Baliah, J. Am. Chem. Soc., 70, 3853 (1948); https://doi.org/10.1021/ja01191a092.
S. Ponnuswamy, M. Venkatraj, R. Jeyaraman, M. Sureshkumar, D. Kumaran and M.N. Ponnuswamy, Indian J. Chem., 41B, 614 (2002).
R.S. Chaudhary and S. Sharma, Indian J. Chem. Technol., 6, 202 (1999).
M. Behpour, S.M. Ghoreishi, A. Gandomi-Niasar, N. Soltani and M. Salavati-Niasari, J. Mater. Sci., 44, 2444 (2009); https://doi.org/10.1007/s10853-009-3309-y.
M. Benabdellah, R. Touzani, A. Aouniti, A. Dafali, S. El Kadiri, B. Hammouti and M. Benkaddour, Mater. Chem. Phys., 105, 373 (2007); https://doi.org/10.1016/j.matchemphys.2007.05.001.
H. Ma, S. Chen, B. Yin, S. Zhao and X. Liu, Corros. Sci., 45, 867 (2003); https://doi.org/10.1016/S0010-938X(02)00175-0.
R. Solmaz, M. Mert, G. Kardas, B. Yazici and M. Erbil, Wuli Huaxue Xuebao, 24, 1185 (2008); https://doi.org/10.1016/S1872-1508(08)60053-4.
V.R. Saliyan and A.V. Adhikari, Corros. Sci., 50, 55 (2008); https://doi.org/10.1016/j.corsci.2006.06.035.
K.F. Khaled, K. Babic-Samardzija and N. Hackerman, J. Electrochem., 34, 697 (2004); https://doi.org/10.1023/B:JACH.0000031160.88906.03.