Thermodynamic calculation of the critical potentials of the selective dissolution of Ag-Au and Cu-Au alloys
Protection of Metals - 2007
Tóm tắt
A thermodynamic approach to estimating the critical potential of the selective alloy dissolution E
c at a vacancy concentration N
v(s) in the superficial layer is considered. The N
v(s) dependence on the potential and the concentration of gold N
Au in the alloy is calculated. The E
c potential corresponds to the critical concentration of vacancies N
v(s) ≈ 10−2, and the E
c value itself is determined chiefly by the zero-point potential of the alloy, which is a pronounced function of the surface enrichment in gold. The calculated E
c-N
Au functions for Ag-Au and Cu-Au alloys satisfactorily coincide with the experimental dependences.
Từ khóa
Tài liệu tham khảo
Pickering, H. And Wagner, G., J. Electrochem. Soc., 1967, vol. 114, no. 7, p. 698.
Gerischer, H. And Rickert, H., Z. Metallkunde, 1955, vol. 46, p. 681.
Pickering, H.W. and Birne, P.J., J. Electrochem. Soc., 1971, vol. 118, no. 2, p. 209.
Marshakov, I.K., Zashch, Met., 2002, vol. 38, p. 139.
Anokhina, I.V., Vvedenskii, A.V., and Marshakov, I.K., Zashch. Met., 1988, vol. 24, no. 2, p. 179.
Zartsyn, I.D., Vvedenskii, A.V., and Marshakov, I.K., Elektrokhimiya, 1994, vol. 30, no. 4, p. 544.
Anokhina, I.V., Vvedenskii, A.V., and Marshakov, I.K., Zashch. Met., 1989, vol. 25, no. 1, p. 13.
Vvedenskii, A.V., Bobrinskaya, E.V., Marshakov, I.K., and Storozhenko, V.N., Zashch. Met., 1993, vol. 29, no. 4, p. 560.
Andreev, Yu.Ya., Zh. Fiz. Khimii, 1998, vol. 72, no. 3, p. 529.
Andreev, Yu.Ya., Electrochim. Acta, 1998, vol. 43, p. 2627.
Andreev, Yu.Ya., Zh. Fiz. Khimii, 2000, vol. 74, no. 5, p. 913.
Andreev, Yu.Ya. and Kutyrev, A.E., Zh. Fiz. Khimii, 2001, vol. 75, no. 10, p. 689.
Andreev, Yu.Ya., Zh. Fiz. Khimii, 2002, vol. 76, no. 1, p. 106.
Andreev, Yu.Ya., Zh. Fiz. Khimii, 2002, vol. 76, no. 2, p. 98.
Andreev, Yu.Ya., Zh. Fiz. Khimii, 2005, vol. 79, no. 2, p. 239.
Andreev, Yu.Ya., Zashch. Met., 2007, vol. 43, no. 1, p.
Andreev, Yu.Ya. and Kutyrev, A.E., Zashch. Met., 2004, vol. 40, no. 3, p. 272.
Sevast’yanov, E.S., Vitanov, T., and Popov, A., Elektrokhimiya, 1972, vol. 8, p. 412.
Khoinig, N. and Batrakov, V.V., Elektrokhimiya, 1979, vol. 15, p. 1833.
Hamelin, A. and Leqoeur, J., Coll. Czechosl. Chem. Commun., 1971, vol. 36, p. 714.
Frumkin, A.N., Potentsialy nulevogo zaryada (Zero Point Potentials), Moscow: Nauka, 1982.
Trassatti, S., Electrochim. Acta, 1983, vol. 26, p. 1083.
Fain, S.C. and McDavid, J.M., Phys. Rev. B, 1974, vol. 9, p. 5099.
Kukk, Yu. And Klavilie, J., Elektrokhimiya, 1977, vol. 13, p. 841.
Kozaderov, O.A. and Koroleva, O.A., Tezisy dokladov I Vserossiiskoi konferentsii “FAGRAN-2004” (Theses of I All-Russian Conference “FAGRAN-2004”), Voronezh, 2004, p. 85.
Marshakov, I.K., Vvedenskii, A.V., Kondrashin, V.Yu., and Bokov, G.A., Anodnoe rastvorenie i selektivanaya korroziya splavov (Anodic Dissolution and Selective Corrosion of Alloys), Voronezh: VGU, 1988.
Kubashevskii, O. and Olkok, K.B., Metallurgicheskaya termokhimiya (Metallurgical Thermochemistry), Moscow: Metallurgiya, 1982.
Esin, O.A. and Markov, B.V., Zh. Fiz. Khimii, 1939, vol. 10, p. 353.
Popov, Yu.A., Teoriya vzaimodeistviya metallov i splavov s korrozionno-aktivnoi sredoi (Theory of Metal an Alloy Interaction with a Corrosive Environment), Moscow: Nauka, 1995.
Vella, M.E., Andreasen, G., Aziz, S.G., et al., Electrochim. Acta, 1998, vol. 43, p. 3; Phys. Rev. B, 1996, vol. 53, p. 10217.