Abstract: The theoretical concepts of polarization behavior of the Fe (ON)₆^4-/Fe(ON)₆^3- redox couple on semiconducting electrodes in a boric acid/sodium borate buffer solution are discussed in this paper. The concentration polarization is considered to determine the overpotential parameters of the redox couple through a study of polarization curves of a semiconducting electrode polarized by linear. sweep potential. It is found that a part of the overpotential occurs in colored films on stainless steel. In addition, the mechanism by which the charge transfer reaction proceeds on films is also approached.

Key words: polarizatioja, colored film, semioonduotor