Salih S. Al-Juaid *
Chem. Dept., Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
Received 5 November 2006; accepted 19 July 2007
Abstract
The effect of some mono azo dyes compounds on the dissolution of aluminium in 0.01 M NaOH solutions was studied using weight loss and galvanostatic polarization techniques. The percentage inhibition efficiency was found to increase with increasing concentration of inhibitor and with decreasing temperature. The inhibition mechanism was discussed on the basis of the formation of complex compound adsorbed on the metal surface. The adsorption process follows Frumkin isotherm. The effect of temperature on the rate of corrosion in the absence and presence of these compounds was also studied. Some activated thermodynamic parameters were computed.
Keywords: mono azo dyes, aluminium, inhibitors.
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References
1. M. Abdallah, Corros. Sci. 46 (2004) 1981.
2. A.Y. El-Etre, H.E. Megahed, M. Abdallah and M.A. Obied, Corros. Prev. 32, March (2004).
3. S.S. Abd El-Rehim, H.H. Hassan and M.A. Amin, Mater. Chem. Phys. 78 (2002) 337.
]]> 4. M.L. Zheludkevich, K.A. Yasaku, S.K. Poznyak and M.G.S. Ferreira, Corros. Sci. 47 (2005) 3368.5. M.M. Osman and S.S. Abd El-Rehim, Mater. Chem. Phys. 53 (1998) 34.
6. G.K. Gomma and M.H. Wahdan, Mater. Chem. Phys. 39 (1995) 209.
7. M. Abdallah, Bull. Electrochem. 16(6) (2000) 258.
8.M.R. Saleh and A.M. Shams El-Din, Corros. Sci. 21 (6) (1981) 439.
9.P.B. Mathur and T. Vasudevan, Corrosion 38 (1982) 17.
10.G.A. El-Mahdy and S.S. Mahmoud, Corrosion 51(6) (1995) 436.
11.G. Moretti, G. Quartorone, A. Tassan and A. Zingales, Werkst. Korros. 45 (1994) 641.
12.B.B. Damaskin, O.A. Pedtri and V.V. Batra Kov, "Adsorption of Organic Compounds on Electrodes", Plenum Press, New York, p.86 (1971). [ Links ]
13.G. Trabanelli, in “Corrosion Mechanisms” (Ed. F. Mansfeld) Marcel Dekker, New York, 119 (1987).
]]> 14.K.M. Ralls, T.H. Courtney and J. Wullf, Introduction to Materials Science and Engineering, Wiley and Sons, New York, p.214 (1976).15.S.T. Arab and E.M. Noor, Corrosion 49 (1993) 122.
16.S.S. Abd El-Rehim, M.A.M. Ibrahim and K.F. Khaled, J. Appl. Electrochem. 29 (1999) 593.
17.A.S. Fouda, M. Moussa, F. Taha and El-Neanaa, Corros. Sci. 26 (1986) 719.
* Corresponding author. E-mail address: ssaljuaid@hotmail.com
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