where: m is the deposit weight [g], Fe% and Ni% [wt.%] are the percents of iron and nickel in deposits, respectively, [Eq.sub.1] and [Eq.sub.2] are the
electrochemical equivalent [g x [C.sub.-1]] of [Fe.sup.2+] and [Ni.sup.2+], respectively, I is the deposition current [A], and t is the deposition time [s]; we obtain theoretical equations of the balance sheet cathode (5) / (13) and replacement anode compartment by the degree of transformation [[eta].sub.NiFe] of the component values in each balance equation with equation ([MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]), assessment of theoretical equations are obtained (14) / (23) (Tab.