Effect of boron addition on pitting corrosion resistance of modified 9Cr-1Mo steel: Application of electrochemical noise
Effect of boron addition on pitting corrosion resistance of modified 9Cr-1Mo steel: Application of electrochemical noise
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Date
2011-10-17
Authors
Pujar, M. G.
Das, C. R.
Thirunavukkarasu, S.
Kamachi Mudali, U.
Bhaduri, A. K.
Brijitta, J.
Tata, B. V.R.
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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. © 2011 Elsevier B.V. All rights reserved.
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Keywords
9Cr-1Mo,
Boron,
C. electrochemical techniques,
D. corrosion,
Electrochemical noise,
electron microscopy,
microstructure,
Pitting corrosion
Citation
Materials Chemistry and Physics. v.130(1-2)