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Effect of inclusions modified by rare earth elements (Ce, La) on localized marine corrosion in Q460NH weathering steel
Liu, C.; Revilla, R.I.; Liu, Z.; Zhang, D.; Li, X.; Terryn, H. (2017). Effect of inclusions modified by rare earth elements (Ce, La) on localized marine corrosion in Q460NH weathering steel. Corros.Sci. 129: 82-90. https://dx.doi.org/10.1016/j.corsci.2017.10.001
In: Corrosion science. Pergamon: Oxford, etc.. ISSN 0010-938X; e-ISSN 1879-0496
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Carbon steel; AFM; SEM; Inclusion; Pitting corrosion
Auteurs  Top 
  • Liu, C.
  • Revilla, R.I.
  • Liu, Z.
  • Zhang, D.
  • Li, X.
  • Terryn, H.
Abstract
    In this work the initial stages of the pitting corrosion in Q460NH weathering steel in a marine environment was studied. To elucidate the effects of inclusions modified by rare earth (RE) elements on pitting corrosion, field emission-scanning electron microscopy-energy dispersive spectrometry (FE-SEM-EDS) analyses, scanning Kelvin probe force microscopy (SKPFM) tests, and a series of immersion tests were conducted. Two main types of inclusions were formed in the steel, and different pit morphologies were observed. The pitting corrosion was initiated by the dissolution of (RE)2O2S-(RE)xSy in both types of inclusions due to the lower potential of this phase compared to the matrix, which indicated that the inclusions in the Q460NH weathering steel had a lower pitting corrosion resistance than the matrix.
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