Abstract
The effects of the concentration and chemical structure of 2-substituted benzoimidazoles (BIs) on copper and zinc dissolution in phosphate electrolytes were studied. X-ray photoelectron study of copper or zinc electrodes revealed that their surface coverages with an inhibitor depend on its concentration in solution; metal complexes with the inhibitor form a protective surface film. The protective effects of substituted BIs on copper and zinc in phosphate electrolytes vary with the chemical structure of an inhibitor and the metal nature. Electron-withdrawing groups enhance the inhibitive effects of BIs on copper dissolution, while electron-donating groups are favorable for zinc protection; this is associated with the different σ- and π-bonding abilities of these metals. The formation of protective copper complexes is facilitated by π-bonding between the metal and an inhibitor, while zinc is protected best in the presence of strong σ-bonds.
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REFERENCES
Kuznetsov, Yu.I., Rozenfel'd, I.L., Podgornova, L.P., and Balashova, N.N., Elektrokhimiya, 1978, vol. 14,no. 12, p. 1869.
Kuznetsov, Yu.I. and Podgornova, L.P., Zashch. Met., 1983, vol. 19,no. 1, p. 98.
Grigor'ev, V.P. and Ekilik, V.V., Khimicheskaya struktura i zashchitnoe deistvie ingibitorov korrozii (Chemical Structure and Protective Effect of Corrosion Inhibitors), Rostov-on-Don: Rostov. Gos. Univ., 1978.
Ekilik, V.V. and Grigor'ev, V.P., Priroda rastvoritelya i zashchitnoe deistvie ingibitorov korrozii (Solvent Nature and Protective Effect of Corrosion Inhibitors), Rostov-on-Don: Rostov. Gos. Univ., 1984.
Kuznetsov, Yu.I., Organic Inhibitors of Corrosion of Metals, New York: Plenum, 1996.
Kuznetsov, Yu.I. and Podgornova, L.P., Elektrokhimiya, 1984, vol. 20,no. 7, p. 982.
Kuznetsov, Yu.I. and Podgornova, L.P., Zashch. Met., 1985, vol. 21,no. 3, p. 487.
Zhdanov, Yu.A. and Minkin, V.I., Korrelyatsionnyi analiz v organicheskoi khimii (Correlation Analysis in Organic Chemistry), Rostov-on-Don: Rostov. Gos. Univ., 1966.
Podgornova, L.P., Shirokov, V.F., Kazanskii, L.P., and Kuznetsov, Yu.I., Izv. Akad. Nauk SSSR, Ser. Khim., 1987, no. 10, p. 2221.
Albert, A. and Sergeant, E., Konstanty ionizatsii kislot i osnovanii (Ionization Constants of Acids and Bases), Moscow: Khimiya, 1964.
Spravochnik khimika (Chemist's Reference Book), Nikol'skii, B.P., Ed., Moscow: Khimiya, 1964, vol. 3.
Exner, O., Correlation Analysis in Chemistry, New York: Plenum, 1978.
Grinberg, A.A., Vvedenie v khimiyu kompleksnykh soedinenii (Introduction to Coordination Chemistry), Moscow: Khimiya, 1966.
Lebedeva, L.I., Kompleksoobrazovanie v analiticheskoi khimii (Complexation in Analytical Chemistry), Leningrad: Leningr. Univ., 1985.
Li, S.L., Wang, Y.G., Chem, S.H., et al., Corros. Sci., 1999, vol. 41,no. 9, p. 1769.
Beccaria, A.M. and Betoloto, C., Electrochim. Acta, 1997, vol. 42,no. 9, p. 1361.
Yatsimirskii, K.B., Zh. Neorg. Khim., 1957, vol. 2,no. 10, p. 2346.
Ramachandran, S. and Jovancicevic, V., Corrosion, 1999, vol. 55,no. 3, p. 259.
Lukovits, I., Kalman, E., and Zucchi, F., Corrosion, 2001, vol. 57,no. 1, p. 3.
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Kuznetsov, Y.I., Podgornova, L.P. & Kazanskii, L.P. Chemical Structures of Benzoimidazoles and Their Protective Effects on Zinc and Copper in Phosphate Electrolytes. Protection of Metals 40, 130–135 (2004). https://doi.org/10.1023/B:PROM.0000021608.70697.23
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DOI: https://doi.org/10.1023/B:PROM.0000021608.70697.23