Investigation on Two Salen Type Schiff base Compounds as Corrosion Inhibition of Copper in 0.5 M H2SO4

Year 2009, Volume: 22 Issue: 3, 175 - 182, 26.03.2010

Fatemeh Ravarı , Athareh Dadgarınezhad İran Shekhshoaeı

Abstract

The inhibition of copper corrosion by two new Schiff bases under 0.5 M H₂SO₄ at 25^oC was studied by electrochemical tests (potentiodynamic polarization and AC impedance technique).These studies have shown that two Schiff bases are good inhibitors for copper in 0.5 M H₂SO₄. Results obtained reveal that, as the concentration of two Schiff bases increases, the polarization resistance values ( Rt ) increases, the double layer capacitance values (Cdl) decrease and inhibition efficiency increases. The inhibition process was attributed to the formation of an adsorbed film on the metal surface that protects the metal against corrosive agents. It was found that these two Schiff bases were chemically adsorbed on the copper surface and follow Langmuir isotherm. The Tafel polarization have shown that two Schiff bases act as anodic inhibitors.

 

Key Words: Corrosion inhibition, Schiff base, AC impedance, Inhibition efficiency.

 

Keywords

Corrosion inhibition, Schiff base, AC impedance, Inhibition efficiency

References

• Kertite, S., Hammouti, B., “Corrosion Inhibition of Iron in 1MHCl by 1Phenyl-5-mecapto-1,2,3.4- tetazzole”, Appl.Surf.Sci., 93: 59-66 (1996).
• Quraishi, M.A., Ansari, F.A., Jamal, D.M., “Thiourea derivatives as Corrosion Inhibitors Mild Steel Formic Acid”, Mater.Chem. Phys., 77: 687- 690 (2002).
• Chelouani, A., Aouniti, A., Hammouti, B., Benchat,N., et al.,” Corrosion Inhibitors for Iron in Hydrochloric Acid Solution by Newly Synthesized Pyridazin Derivatives”, Corros.Sci., 45:1675-1684 (2003). [4] Khaled, K.F., “The Inhibition Effect of Benzimidazole Derivatives on the Corrosion of Iron in 1MHCl Solutions”, Electrochimica Acta., 48: 2493-2503 (2003)
• Chebabe, D., Ati Chikh, Z., Hajjaji, N., Srhiri, A., Zucchi, F., “Corrosion Inhibition of Armco Iron in 1MHCl Media by New Bipyrazolic Derivatives”, Corros.Sci., 45: 309-320 (2003).
• Desai, M.N., Desai, M.B., Shah, J.B., Desai, M., “ Schiff-bases as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution”, Corros. Sci., 26: 827-837 (1986).
• Shokry, H., Yuasa, M., Sekine, I., Issa, R.M., EL- Baradie, Inhibition Mild Steel by Schiff Base Compounds in Various Aqueous Solutions”: part 1, Corros. Sci., 40:2173-2186 (1998). G.K.,” Corrosion
• Hosseini, M., .Mertens, F.L., Gorbani, M., Arshadi, M., “Asymitrical Schiff Bases as Inhibitors of Mild Steel Corrosion in Sulphuric Acid Media”, Materials Chemistry and Physics, 78:800-808 (2003).
• Baghae, F., Sheikhshoaie, I., Dadgarnezhad, A., ”Investigation on some two bidentate N,O schiffbase ligands os corrosion inhibitors on mild steel”, Asian Journal of Chemistry, 3:127-137 (2005).
• El Ashry, El Sayed H., El Nemr, A., Essawy, S.A., Ragab, S., ”Quantum Chemical Studies on the Efficiencies of Some Aromatic Hydrazides and Schiff Bases as Corrosion Inhibitors of Steel in Acidic Medium”, ARKIVOC.XI:205-220 (2006).
• Ma, H., Chen, S., Zhao, S., Liu, X., Liu, D., Li, D., ”A Study of Corrosion Behavior of Copper in Acidic Cetyltrimethylammonium Electrochem. Soc., 148: B482-B488 (2001). boromide”, J.
• Li, S., Chen, S., Lei ,S., Ma, H., Yu, R., Liu, D., “Investigation on some Schiff Bases in HCl as Corrosion Inhibitors foe Copper”, Corros. Sci., 41:1273-1287 (1999).
• Quan, Z., Chen, S., Li, Y., Cui, X., ” Adsorption Behaviour of Schiff Base and Corrosion Protection of Resulting films to Copper Substrate”, Corros. Sci., 44:703-715 (2002).
• Quan, Z., Chen, S., Li, S., ”Protection of Copper Corrosion by Modification of Self-assembled Films of Schiff-bases with Alkanethiol”, Corros. Sci., 43:1071-1060 (2001).
• Gao, G., Cheng Hao, L., ”1,3-Bis-diethylamino- propan-2-ol as Corrosion Inhibitor for Brass”, Corros. Sci., 49:3479-3493 (2007).
• Barica, O.E., Mattos, O.R., Pedere, N., Tribollet, B., Electrochedissolution Electrchem.Soc., 140: 2825 (2003). for the J. of copper”,
• Deslouis, C., Tribollet, B., Mengoli, G., Musiani, M.M., ”Electrochemical Bhavioure of Copper in Neutral Aerated Chloride Solution”, J. Appl. Electrchem., 18: 374-383 (1988).
• Bentiss, F., Traisnel, M., Lagrenee, M., ”The Substituted 1-3-4-Oxadiazole:a New Class of Corrosion Inhibitors of Mild Steel in Acidic Medium”, Corros. Sci., 42:127-146 (2000).
• Wu, X., Ma, S., Chen, S., Xu, Z., Sui, A., “General Equivalent Circuts for Faradic Electrode Processes under Electrochemical Reaction Control”, J. Electrochem. Soc., 146:1847-1853 (1999).
• Ma, H., Cheng, X., Li, G., Chen, S., Quan, Z., Zhao, S., Niu, L., ”The Influence of Hydrogen Sulfide on Corrosion of Iron under Different Condition”, Corros .Sci., 42:1669-1683 (2000).
• Li, P., Tan, T.C., Lee, T.Y., ”Impedance Spectra of the Anodic Dissolution of Mild Steel in Sulfuric Acid”, Corros.Sci., 38:1935-1955 (1996).
• Rehim, S.S.A., Hassan, H.H., Amin, M.A., ”Corrosion and Corrosion Inhibition of Al and Some Alloys in Sulphate Solutions Containing Halid Ions Investigated by an Impedance Technique”, Appl. Surf. Sci., 189:279-290 (2002).
• Kardas, G., ”The Inhibition Effect of 2- Thiobarbituric Acid on the Corrosion Performance of Mild Steel in HCl Solution”, J. Materials Science , 41:337-343 (2005).
• Sastri, V.S., Corrsion Inhibitors, John Wiley &Sons, New York, (1998).
• Do, D., Adsorption Analysis: Equilibria and Kinetics, Imperial College Press, (1998). [26] Amin, M.A., “Weight Loss Polarization ,Electrochemical Impedance Spectroscopy, SEM and EDX Studied od the Corrosion Inhibition of Copper in Aerated NaCl Solution”, J. Applied Electrochemistry, 36:215-226 (2005).
• Abdallah, M.,”Rhoadmine Azosupha as corrosion inhibitors for Corrosion of 304 Stainless Steel in hydrocholoric Acid solution”, Corros Sci., 44:717- 728 (2002).