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Anodic reactions of amorphous and devitrified Fe-B-Si-Nb-Cu alloys in buffered chloride and fluoride
I. Chattoraj, K. Ram Mohan Rao, S. Das,
Published in Elsevier Sci Ltd, Exeter, United Kingdom
1999
Volume: 41
   
Issue: 1
Pages: 1 - 16
Abstract
The anodic response of two Fe-Si-B-Cu-Nb alloys was investigated in buffered chloride and fluoride media through polarisation studies and corrosion product analysis. It was found that the anodic reactions and dissolution of the alloys were dependent on the alloy compositions as well as the state (amorphous or crystalline) of the alloy substrate. It was observed that crystallisation resulting in the formation of the ordered Fe80Si20 phase only, was beneficial to corrosion resistance in chloride media, however the presence of secondary intermetallic phases was detrimental. The anodic responses in the fluoride media were dominated by the formation of fluorosilicate. The anodic response of two Fe-Si-B-Cu-Nb alloys was investigated in buffered chloride and fluoride media through polarisation studies and corrosion product analysis. It was found that the anodic reactions and dissolution of the alloys were dependent on the alloy compositions as well as the state (amorphous or crystalline) of the alloy substrate. It was observed that crystallisation resulting in the formation of the ordered Fe80Si20 phase only, was beneficial to corrosion resistance in chloride media, however the presence of secondary intermetallic phases was detrimental. The anodic responses in the fluoride media were dominated by the formation of fluorosilicate.
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Figures & Tables (9)
  • Figure-0
    Fig[ 1[ Crystallisation of the alloys indicated by the DSC scan ... Expand
  • Figure-1
    Fig[ 2[ Potentiodynamic polarisation of the amorphous alloys ... Expand
  • Figure-2
    Fig[ 3[ "a#[ Post!exposure appearance of amorphous alloy ... Expand
  • Figure-3
    Table 1 Anodic reaction product deposited after potentiostatic ... Expand
  • Figure-4
    Fig[ 4[ Appearance of amorphous alloy 1 after exposure ... Expand
  • Figure-5
    Fig[ 5[ Potentiodynamic polarisation of the crystallised alloys ... Expand
  • Figure-6
    Fig[ 6[ "a#[ Post!exposure appearance of crystallised alloy ... Expand
  • Figure-7
    Fig[ 7[ "a# Post!exposure appearance of crystallised alloy ... Expand
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About the journal
JournalData powered by SciSpaceCorrosion Science
PublisherData powered by SciSpaceElsevier Sci Ltd, Exeter, United Kingdom
ISSN0010938X