Synthesis of corrosion inhibitive poly(2,5-dimethylaniline) coatings on low carbon steel
Tóm tắt
An attempt has been made towards the synthesis of strongly adherent poly(2,5-dimethylaniline) coatings on low carbon steel substrates, with an objective of examining the possibility of using this polymer for corrosion protection of steel in chloride environment. In this work, the poly(2,5-dimethylaniline) coatings were synthesized by electrochemical polymerization of 2,5-dimethylaniline using sodium salicylate as a supporting electrolyte. The characterization of these coatings was carried out by cyclic voltammetry, UV-visible absorption spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy. The results of these characterizations indicate that the aqueous salicylate solution is a suitable medium for the electrochemical polymerization of 2,5-dimethylaniline to generate strongly adherent and smooth poly(2,5-dimethylaniline) coatings on low carbon steel substrates. The performance of poly(2,5-dimethylaniline) as protective coating against corrosion of low carbon steel in aqueous 3% NaCl was assessed by the open circuit potential and the potentiodynamic polarization measurements. The potentiodynamic polarization measurement reveals that the poly(2,5-dimethylaniline) coating increases the corrosion potential and reduces the corrosion rate of low carbon steel almost by a factor of 50. This study clearly ascertains that the poly(2,5-dimethylaniline) has outstanding capability to protect low carbon steel against corrosion in chloride environment.
Tài liệu tham khảo
T. A. SKOTHEIM (Ed.), “Handbook of Conducting Polymers”, Vols. I and II (Marcel Dekker Inc., New York, 1986).
H. S. NALWA, “Handbook of Organic Conductive Molecules and Polymers”, Vols. 1–4 (John Wiley and Sons Ltd., 1997).
P. CHANDRASEKHAR, “Conducting Polymers: Fundamentals and Appplications” (Kluwer Academic Publishers, Dordrecht, Holland, 1999).
D. E. TALLMAN, G. SPINKS, A. DOMINIS and G. WALLACE, J. Solid State Electrochem. 6 (2002) 73.
Idem., ibid. 6 (2002) 85.
M. M. POPOVIC and B. N. GRGUR, Synth. Met. 143(2) (2004) 191.
J. I. MARTINS, M. BAZZAOUI, T. C. REIS, E. A. BAZZAOUI and L. I. MARTINS, ibid. 129 (2002) 221.
M. BAZZAOUI, L. I. MARTINS, E. A. BAZZAOUI and T. I. MARTINS, Electrochemica Acta. 47 (2002) 2953.
N. A. OGURTSOV, A. A. PUD, P. KAMARCHIK and G. S. SHAPOVAL, Synth. Met. 143(1) (2004) 43.
K. SHAH and J. IROH, ibid. 132 (2002) 35.
S. AEIYACH, B. ZAID and P. C. LACAZE, Electrochim. Acta 44 (1999) 2889.
P. A. KILMARTIN, L. TRIER and G. A. WRIGHT, Synth. Met. 131 (2002) 99.
M. C. BERNARD, S. JOIRET, A. H. LE-GOFF and P. D. LONG, J. Electrochem. Soc. 148(8) (2001) B299.
D. W. DEBERRY and A. VIEHBACK, in The Electrochemical Society Softbound proceedings Series, edited by E. Mccaffetry, C. R. Clayton and J. Oudar (Pennington, NJ, 1984), 308.
J. I. MARTINS, T. C. REIS, M. BAZZAOUI, E. A. BAZZAOUI and L. I. MARTINS, Corros. Sci. 46 (2004) 2361.
P. HERRASTI and P. OCON, Appl. Surf. Sci. 172 (2001) 276.
H. NGUYEN THI LE, B. GARCIA, C. DESLOUIS and Q. LE XUAN, Electrochimica Acta 46 (2001) 4259.
L. H. C. MATTOSO and L. O. S. BILHOES, Synth. Met. 52 (1992) 171.
L. H. C. MATTOSO, S. K. MANOHER, A. G. MACDIARMID and A. J. EPSTEIN, Polymer Sci. Part A : Polymer Chem. 33 (1995) 1227.
V. SHINDE and P. P. PATIL, Mater. Sci. Technol. 19 (2004) 1604.
V. SHINDE, S. CHAUDHARI, S. R. SAINKAR and P. P. PATIL, Mater. Chem. Phys. 82(3) (2003) 622.
J. PETITJEAN, S. AEIYACH, J. C. LACROIX and P. C. LACAZE, J. Electroanal. Chem. 478 (1999) 92.
M. STERN and A. GEARY, ibid. 104 (1957) 56.
Electrochemistry and Corrosion—Overview and Techniques, Application Note CORR -4, EG and G, Princeton Applied Research, U.S.A.
D. E. STILLWELL and S. M. PARK, J. Electrochem. Soc. 135 (1988) 2254.
J. TANG, X. JING, B. WANG and F. WANG, Synth. Met. 24 (1988) 231.
T. OHSAKA, Y. OHNUKI, N. OYAMA, G. KATAGIRI and K. KAMISAKO, J. Electroanal. Chem. 161 (1984) 399.
W. Y. ZHENG, K. LEVON, T. TAKA, J. LAAKSO and J. E. OSTERHOLM, Polym. J. 28 (1996) 412.
K. G. NEOH, E. T. KANG and K. L. TAN, J. Phys. Chem. 95 (1991) 10151.
S. PATIL, Ph.D. Thesis, North Maharashtra University, Jalgaon, India (2000).