Alternative models of passive state of metals. Part III: Comparison of different models

Principal aspects of current theories of the passive state of metals are co mpared. Each theory contains three main parts (or models). Two of them are interfaces between the passive film (PF) and (1) the electrolyte (FE interf ace) (2) the metal (MF interface); the third one (3) is the film itself, wh ich transfers ions between these interfaces. The paper covers all three top ics. The processes' paths, an adequate set of equations, and their aggregat e studies compose what is referred to as a term "model." The reviewed theor ies can mainly be distinguished by the means of interpreting processes proc eeding at the MF and FE interfaces and in the bulk of PF which are discusse d in this work.