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SIMS imaging studies of the corrosion of alloy 800 and alloy 600 surfaces under secondary side boiler conditions
Author(s) -
McIntyre N. S.,
Davidson R. D.,
Weisener C. G.,
Taylor K. R.,
Gonzalez F. C.,
Rasile E. M.,
Brennenstuhl A. M.
Publication year - 1992
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740180806
Subject(s) - alloy , corrosion , metallurgy , grain boundary , materials science , superalloy , secondary ion mass spectrometry , oxide , passivation , boiler (water heating) , ion , chemistry , microstructure , composite material , organic chemistry , layer (electronics) , engineering , waste management
The nickel‐rich superalloys Alloy 600 and Alloy 800 have been corroded in mildly alkaline deuterated aqueous conditions typical of secondary coolant circuits in a nuclear power station. The oxide films and substrates of these alloys have been analysed by imaging SIMS depth profiling, which makes it possible to describe elemental distribution in all three dimensions. The measurement of the distribution of the secondary ions NiO − , FeO − and CrO − appears useful for detailing the behaviour of nickel, iron and chromium within oxidized phases. The measurement of D − distribution outlines the extent of oxide hydration. For Alloy 800, evidence of sodium migration into the grain boundaries of the alloy substrate is found. For Alloy 600, no grain boundary sodium ingress can be identified under comparable corrosion conditions.