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Corrosion Behavior of Alloy 600 in Simulated Nuclear High Level Waste Medium

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Abstract

Nickel-based alloys are being considered as candidate materials for the storage of high level waste. In the present investigation, Alloy 600 was assessed by potentiodynamic anodic polarization technique for its corrosion behavior in the as-received, solution annealed, and sensitized condition in 3 M HNO3 and 3 M HNO3 containing simulated high level waste. From the results of the investigation, it was found that the solution annealed specimen possesses superior corrosion resistance compared to the as-received and sensitized specimen. Double loop electrochemical potentiokinetic reactivation test was carried out to study the degree of sensitization. The effect of different concentrations of chloride ions in 3 M HNO3 at 25 °C indicated tendency for pitting as the concentration of chloride ions was increased. Microstructural examination was carried out by optical microscope and scanning electron microscope after electrolytic etching. X-ray photoelectron spectroscopy study was carried out to investigate the passive film formed in 3 M HNO3 and 3 M HNO3 simulated high level waste.

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Acknowledgments

The authors would like to acknowledge Prof. Ramesh Chandra, IIT, Roorkee and Mr. B. Shashank Dutt of Materials Development and Technology Group, IGCAR for the help in SEM observation of the specimens. Also, thanks to Mr. T. Nandakumar of Corrosion Science & Technology Group, IGCAR for the technical support in carrying out the specimen preparation for the polarization tests.

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  1. Corrosion Science & Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    Pradeep Kumar Samantaroy, Girija Suresh, Nanda Gopala Krishna & U. Kamachi Mudali

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  1. Pradeep Kumar Samantaroy
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  2. Girija Suresh
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  3. Nanda Gopala Krishna
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  4. U. Kamachi Mudali
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Correspondence to U. Kamachi Mudali.

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Samantaroy, P.K., Suresh, G., Krishna, N.G. et al. Corrosion Behavior of Alloy 600 in Simulated Nuclear High Level Waste Medium. J. of Materi Eng and Perform 22, 1041–1053 (2013). https://doi.org/10.1007/s11665-012-0345-6

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  • DOI: https://doi.org/10.1007/s11665-012-0345-6

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