Corrosion inhibition of triethanolammonium bromide mono- and dibenzoate as cationic inhibitors in an acidic medium
Tóm tắt
A weight loss technique was used to determine the corrosion inhibition efficiency of synthesized alkyl mono-and dibenzoate triethanolammonium bromide derivatives (TEAMB, TEADB) in an acidic medium (2 N HCl) at different doses (50, 100, and 200 ppm). The results showed that monoderivatives had a higher corrosion inhibition efficiency than diderivatives. The results were correlated with several factors, including the alkyl chain length of the hydrophobic chains, interfacial tension (IT), critical micelle concentration (CMC), and adsorption free energy of these inhibitors. Increasing the geometric length of the alkyl chains in the synthesized inhibitors had an increasing effect on their corrosion inhibition efficiency, whereas decreasing the CMC and IT had an increasing effect on their tendency toward corrosion inhibition. The number of hydrophobic chains attached to the inhibitor molecules had a vital influence on their efficiency as corrosion inhibitors.
Tài liệu tham khảo
Craddock, H.A., U.S. Patent Application 20040259740A1 (2004).
Ajmal, M., J. Rawat, and M.A. Quraishi, Thioamidines as Novel Class of Corrosion Inhibitors, Br. Corros. J. 34:220 (1999).
Kerra, S.T., N.A. Negm, S.M. Ahmed, and A.M. Badawi, Surface Parameters and Corrosion Inhibition of Some Isothiouronium Derivatives, J. Sci. Ind. Res. 61:712 (2002).
Walker, M.L., Chemical Abstracts Patent 2,482,513 (2003).
Pillai, K., and R. Narayan, Inhibition of Corrosion of Iron in Acids by Thiourea and Derivatives, J. Electrochem. Soc. 125:1393 (1978).
Yu, X., W. Zhang, and T. Garosshen, European Patent 1,493,846 A1 (2004).
Kendig, M.W., U.S. Patent Application 20040175587A1 (2004).
Morsy, S. M. I., and N.A. Negm, Characterization of Triethanolammonium Bromide Mono- and Dibenzoate as Cationic Surfactants, Egypt. J. Chem., in press.
Moran, F., Anticorrosion Composition, U.S. Patent 4,276,089 (1981).
Negm, N.A., Surface Activities and Electrical Properties of Long Chain Diquaternary Bola-Form Amphiphiles, Egyp. J. Chem. 45:486 (2002).
Yu, X., W. Zhang, T. Garosshen, P. Bhatia, M. Jaworowski, F. Lamm, X. Tang, A. Besing, M.A. Kryzman, and X. Chang, European Patent EP1493846 (2005).
Biscoglio, M.B., K.T. Devlin, P.M. Russell, D.P. Wright, B.I. Chaudhary, J. Klier, S.R. Betso, and L.H. Gross, World Patent WO2005003220 (2005).
Overkeme, K., W.J.E. Parr, and J.C. Speelman, World Patent WO03054251 (2003).
Negm, N.A., S.M.I. Morsy, and M.M. Said, Corrosion Inhibition of Some Novel Hydrazone Derivatives, J. Surfact. Deterg. 8:95 (2005).
Negm, N.A., M.A.I. Salem, A.M. Badawi, and M.F. Zaki, Corrosion Inhibition Properties of Some Novel n-Methyl Diethanolammonium Bromide Cationic Surfactants, Proceedings of the 7th International Conference on Chemical Engineering, Vol. 2, Society of Chemical Engineering, Cairo, Egypt, 2004.
El-Dougdoug, W.I.A., K.A.H. Hebash, and A.M.F. Eissa, Cationic Surfactants from Local Mangifera indica Fat, Olaj, Szappan, Kozmet. 50:143 (2001).
Negm, N.A., A.A. Hafiz, and M.Y. El-Awady, Influence of Structure on the Cationic Polytriethanolammonium Bromide Derivatives. II. Corrosion Inhibition, Egypt. J. Chem. 48:201 (2005).
Negm, N.A., and A.S. Mohamed, Surface and Thermodynamic Properties of Diquaternary Bola-Form Amphiphiles Containing an Aromatic Spacer, J. Surfact. Deterg. 7:23 (2004).