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An electrical equivalent for barrier anodic films on aluminium

1972; Elsevier BV; Volume: 17; Issue: 12 Linguagem: Inglês

10.1016/0013-4686(72)87014-2

1873-3859

Itzik Klein, A. Yaniv, John H. White,

Concrete Corrosion and Durability

Abstract A duplex-film model for barrier anodic films on aluminium is suggested, the lower layer being homogeneous and amorphous and the upper consisting of a dispersion of a crystalline phase in an amorphous matrix. From impedance measurements over a range of frequencies, the dielectric constants of the layers are estimated as 12 and 9 respectively.