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Effect of Nanostructured Surface on the Corrosion Behavior of RAFM Steels

  • Yanhong Lu
  • Maolong Zhang
  • Weibao Tang
  • Yuanyuan Song
  • Lijian RongEmail author
Original Paper
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Abstract

This study investigated the effect of a preformed nanostructured surface on the corrosion behavior of 9Cr2WVTa reduced activation ferritic/martensitic (RAFM) steel and 9Cr+AlSi steel (9Cr2WVTa with the 0.12 wt.% Al and 0.68 wt.% Si addition) at 700 °C in air and at 550 °C in liquid lead–bismuth eutectic (LBE) alloys. The nanostructured surface layer was fabricated by surface mechanical rolling treatment (SMRT). The results showed that the SMRT 9Cr+AlSi sample has a lower oxidation rate than the SMRT 9Cr2WVTa steel at 700 °C in air, due to the faster diffusion rates of Al, Cr and Si in the nanostructure and a higher diffusion driving force increased by Cr. The SMRT 9Cr+AlSi sample at 550 °C in oxygen-saturated LBE alloy also had a higher oxidation rate, due to the formation of Al and Si oxides in the internal oxide layer.

Graphical Abstract

Keywords

Nanostructured surface RAFM Corrosion LBE alloy 
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Notes

Acknowledgements

This work was financially supported by the Major Research Plan of the National Natural Science Foundation of China (No. 91226204) and the Strategic Priority Research Program of the Chinese Academy of Science (No. XDA03010304).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Yanhong Lu
    • 1
  • Maolong Zhang
    • 1
  • Weibao Tang
    • 1
  • Yuanyuan Song
    • 2
  • Lijian Rong
    • 2
    Email author
  1. 1.Shanghai Electric Nuclear Power Equipment Co., LtdShanghaiChina
  2. 2.Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal ResearchChinese Academy of SciencesShenyangChina

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