There have been a considerable number of polarization studies of iron corrosion at room temperature reported in the literature. However, the literature on iron corrosion studies at higher temperatures has not been nearly as extensive. This paper reports on some iron corrosion studies conducted between 23 and 69 C (73 and 156 F).
The iron electrodes were prepared from Ferrovac E iron rod (1/2-inch diameter). The electrodes were cut in 1/4-inch lengths. The cross sectional areas were polished with alumina paper (# 400 and 600). The electrodes were degreased in a soxhlet column with hot benzene for 3 hours, then vacuum annealed at 750 C (1382 F) for one hour and furnace cooled to room temperature. A three electrode electrochemical cell made of pyrex glass with either glass or Teflon fittings was used. The sulfuric acid electrolyte (pH = 2.0) was prepared by addition of KOH to 1N H2...
