A Comparison of the Passive Oxide Films Formed on CANDU Steam Generator Tubing Alloy 600 and Alloy 800
36th Annual CNS-CNA Student Conference - 2012 June 12


Presented at:
36th Annual CNS-CNA Student Conference
2012 June 12
Location:
Saskatoon, Canada
Session Title:
CNS/CNA Student Conference 2012

Authors:
Melissa Faichuk (University of Western Ontario )
Sridhar Ramamurthy (University of Western Ontario )
Jamie Noël (University of Western Ontario )
Leo Lau (University of Western Ontario )
Dave Shoesmith (University of Western Ontario )
  

Abstract

Alloy 600 (A600) steam generator (SG) tubing has been shown to be susceptible to stress corrosion cracking (SCC). Alloy 800 (A800) was developed as a replacement, though it has shown susceptibility to corrosion under certain conditions. The properties of the passive oxide films on both alloys were extensively analyzed to determine why the performance of A800 superior to that of A600. Surface analysis to determine oxide composition was performed using X-ray photoelectron spectroscopy (XPS) and Auger Electron spectroscopy (AES). Electrochemical measurements were made using anodic polarization and electrochemical impedance spectroscopy (EIS).

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