In conditions where tight crevices exist in hot chloride containing solutions Alloy 22 may suffer crevice corrosion. The occurrence (or not) of crevice corrosion in a given environment (e.g. salt concentration and temperature), is governed by the values of the critical potential (Ecrit) for crevice corrosion and the corrosion potential (Ecorr). This paper discusses the evolution of Ecorr and corrosion rate (CR) of creviced Alloy 22 specimens in 5 M calcium chloride (CaCl2) at 120°C. Tested specimens included non-creviced rods and multiple creviced assemblies (MCA) both non-welded (wrought) and welded. Results show that Alloy 22 suffers crevice corrosion under the open circuit conditions in the aerated hot CaCl2 brine. However, after more than a year immersion the propagation of crevice corrosion was not significant. The general corrosion rate decreased or remained unchanged as the immersion time increased. For rods and MCA specimens, the corrosion rate was lower than 100 nm/year after more than a year immersion time.
Skip Nav Destination
ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
July 23–27, 2006
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4758-6
PROCEEDINGS PAPER
Long-Term Corrosion Behavior of Alloy 22 in 5 M CaCl2 at 120°C
John C. Estill,
John C. Estill
Lawrence Livermore National Laboratory, Livermore, CA
Search for other works by this author on:
Gary A. Hust,
Gary A. Hust
Lawrence Livermore National Laboratory, Livermore, CA
Search for other works by this author on:
Kenneth J. Evans,
Kenneth J. Evans
Lawrence Livermore National Laboratory, Livermore, CA
Search for other works by this author on:
Marshall L. Stuart,
Marshall L. Stuart
Lawrence Livermore National Laboratory, Livermore, CA
Search for other works by this author on:
Rau´l B. Rebak
Rau´l B. Rebak
Lawrence Livermore National Laboratory, Livermore, CA
Search for other works by this author on:
John C. Estill
Lawrence Livermore National Laboratory, Livermore, CA
Gary A. Hust
Lawrence Livermore National Laboratory, Livermore, CA
Kenneth J. Evans
Lawrence Livermore National Laboratory, Livermore, CA
Marshall L. Stuart
Lawrence Livermore National Laboratory, Livermore, CA
Rau´l B. Rebak
Lawrence Livermore National Laboratory, Livermore, CA
Paper No:
PVP2006-ICPVT-11-93422, pp. 581-589; 9 pages
Published Online:
July 23, 2008
Citation
Estill, JC, Hust, GA, Evans, KJ, Stuart, ML, & Rebak, RB. "Long-Term Corrosion Behavior of Alloy 22 in 5 M CaCl2 at 120°C." Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. Volume 7: Operations, Applications, and Components. Vancouver, BC, Canada. July 23–27, 2006. pp. 581-589. ASME. https://doi.org/10.1115/PVP2006-ICPVT-11-93422
Download citation file:
2
Views
0
Citations
Related Proceedings Papers
Related Articles
Stifling of Crevice Corrosion in Alloy 22 During Constant Potential Tests
J. Pressure Vessel Technol (February,2009)
Anodic Behavior of Specimens Prepared From a Full-Diameter Alloy 22 Fabricated Mockup Container for Nuclear Waste
J. Pressure Vessel Technol (November,2007)
A Review on Corrosion and Wear of Additively Manufactured Alloys
J. Tribol (May,2021)
Related Chapters
Corrosion-Resistant Alloys (CRAs)
Corrosion and Materials in Hydrocarbon Production: A Compendium of Operational and Engineering Aspects
Pipeline Protection
Pipeline Design & Construction: A Practical Approach, Third Edition
Introduction
Consensus on Operating Practices for the Sampling and Monitoring of Feedwater and Boiler Water Chemistry in Modern Industrial Boilers (CRTD-81)