Abstract
T-22 alloy is an alternative material for heat transfer tube of steam generator of high temperature gas cooled reactor. The corrosion behavior of T-22 alloy in high temperature impure helium and air at 950 °C was studied. After the experiment, the experimental results were analyzed by electronic balance, scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS) and carbon sulfur analyzer. The results show that the corrosion phenomena and mechanisms of T-22 alloy in the atmosphere of extreme low oxygen partial pressure and extreme high oxygen partial pressure are quite different. There was no obvious oxide layer on the surface of T-22 alloy after corrosion in impure helium, and Fe elements did not participate in the oxidation reaction. After corrosion, the alloy had slight mass loss and complete decarburization. After the corrosion of T-22 alloy in air, a large number of Fe elements participated in the oxidation. After the experiment, the oxide layer of the alloy fell off, and the mass gain was very obvious. The alloy was seriously corroded and damaged.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
