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- W2606199427 abstract "The corrosion resistance of iron in acid and neutral chloride solutions has been investigated as a function of the purity of iron. Five kinds of iron having residual resistivity ratios, RRRH,4.2K, of 80, 150, 800, 1500 and 6000 were used as specimens. The former three with RRRH,4.2K 80, 150 and 800 were commercially available pure iron and the latter two with RRRH,4.2K 1500 and 6000 were high purity iron produced by a new method combining anion exchange and zone-refining processes.In deaerated 0.5 kmol·m−3 H2SO4, the corrosion rate of iron decreased sharply with increasing purity; the corrosion rate of iron with RRRH,4.2K 6000 showed only 2% of that of the one with RRRH,4.2K 80. From the examination of cathodic polarization curves in the solution, it was confirmed that the increased hydrogen overpotential of high purity iron resulted in the decrease of corrosion rate.Concerning the pitting corrosion in aerated 0.1 kmol·m−3 NaCl, the corrosion rate decreased slightly with increasing purity. The pitting potential and the induction time for pitting were, however, found to depend strongly on the purity of iron; the values of them measured in a pH 8.45 boric-borate buffer solution containing 0.01 kmol·m−3 NaCl increased sharply with increasing purity. This increased resistance against the initiation of pitting can be ascribed to the improved nature of passive films on high purity iron. The formation of thin compact films with low carrier concentration has been confirmed in situ by ellipsometric and impedance measurements on high purity iron in a pH 8.45 boric-borate buffer solution." @default.
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- W2606199427 date "1982-01-01" @default.
- W2606199427 modified "2023-10-05" @default.
- W2606199427 title "Corrosion Characteristics of High Purity Iron" @default.
- W2606199427 doi "https://doi.org/10.2320/jinstmet1952.46.2_155" @default.
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