Analysis of High-Purity Iron

The Active Iron Electrode

“…On the basis of the results just described, the partial anodic and cathodic current densities may be expressed by Eq. [18] and [19], respectively ia ~ kaa(oH-)m exp (3FE/2RT) [18] Iicl = kca(H+)n exp (--FE/2RT) [19] in which the reaction orders, ~n and n, remain to be determined. A direct evaluation of the order of the anodic reaction with respect to the hydroxyl ion activity was made.…”

“…According to Eq. [18], the reaction order is given by Eq. [20] m ----(a log ~a/OpH)E [20] Using the current densities observed at E =--0.300v (marked in Fig.…”

“…[21], which follows directly from Eq. [18] (aE/apH)~ a = --(2m/3) (2.303 RT/F) [21] the electrode potential at a constant anodic current density should be a linear function of pH and, if ~r~ = 1, the proportionality constant should be equal to --40 mv/pH. Using this approach, the results of anodic order determinations performed on several different electrodes are conveniently summarized in Fig.…”

Ferrous Metallurgy

“…Reviews and useful reference books (1-3) were published. These include such subjects as gases in metals (76,117), activation (41,51), trace analysis (178), electroanalytical chemistry (42,103), microchemical methods (121), sampling and analysis of cast (28) and pig iron (174), analysis of high purity iron (81), analysis of deep drawing steel (119), and x-ray spectroscopy in an industrial organization was published (124)• ALUMINUM Aluminum, in trace amounts, in cast iron was determined by titration after separating a major part of the iron by a butyl acetate extraction.…”