Effect of boron addition on pitting corrosion resistance of modified 9Cr-1Mo steel: Application of electrochemical noise

M. G. Pujar, C. R. Das, S. Thirunavukkarasu, U. Kamachi Mudali, A. K. Bhaduri, J. Brijitta, B. V. R. Tata

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

9Cr-1Mo steels indigenously melted with the addition of boron (Alloy B) and without it (Alloy D) along with Alloy C (without boron addition with minor changes in the trace element concentrations) were studied for their pitting corrosion resistance in 0.001 M, 0.01 M, 0.05 M and 0.1 M sodium chloride solutions using electrochemical noise (EN) technique. Weibull probability plots were used to determine the pit embryo generation rates. Gumbel extreme value analysis was conducted to determine the maximum metastable as well as stable pit radii. The analysis of the data showed superior pitting corrosion resistance of the Alloy B compared to Alloy C as well as Alloy D. (C) 2011 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalMaterials Chemistry and Physics
Volume130
Issue number1-2
Pages (from-to)536-547
ISSN0254-0584
DOIs
Publication statusPublished - 2011
Externally publishedYes

Keywords

  • 9Cr-1Mo
  • Boron
  • C. electrochemical techniques
  • D. corrosion
  • Electrochemical noise
  • Electron microscopy
  • Microstructure
  • Pitting corrosion

Cite this

Pujar, M. G., Das, C. R., Thirunavukkarasu, S., Mudali, U. K., Bhaduri, A. K., Brijitta, J., & Tata, B. V. R. (2011). Effect of boron addition on pitting corrosion resistance of modified 9Cr-1Mo steel: Application of electrochemical noise. Materials Chemistry and Physics, 130(1-2), 536-547. https://doi.org/10.1016/j.matchemphys.2011.07.036