Autors: Tzaneva, B. R., Fachikov L.B., Raicheff R.G.
Title: Pitting corrosion of Cr–Mn–N steel in sulphuric acid media
Keywords: chloride ions, manganese, nitrogen, pitting corrosion, stainless steel, sulphuric acid

Abstract: The resistance to pitting corrosion of austenitic stainless steel Cr18Mn12N has been studied in model solutions of sulphuric acid (0.5 M) containing chloride ions (0.5 M). The cyclic potentiodynamic method has been employed to investigate the effects of chloride ions and agitation rate on the pitting and repassivation potentials. Electron and optical microscopy, electron diffraction spectroscopy and atomic absorption spectrometry have been used to detect the surface sites for pit formation and the growth of pit nuclei. The results obtained with chromium–manganese–nitrogen steel have been compared with those of austenitic Cr18Ni9 stainless steel. A similarity in pit initiation is established, while steel composition exhibits no significant effect. Cr18Mn12N steel is less prone to repassivation as compared with Cr18Ni9 steel.

References

    Issue

    Journal of Applied Electrochemistry, vol. 36, issue 3, pp. 347-353, 2006, Netherlands, Springer Netherlands, ISBN 0021-891X (Print) 1572-8838 (Online)

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    Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus и Web of Science