Abstract
The objective of this research was to understand the physical effects of the implantation process and the chemical effects of implanted species on the formation and breakdown of chromia scales in an oxidizing-sulfidizing atmosphere. Coupons of Fe25Cr and AISI 446 were polished metallographically on both sides up to 1 μm alumina and implanted on both sides with cerium. The energy and the fluence of implantation were about 160 keV and about 10 16 ions cm −2, respectively. A few coupons were implanted with xenon to isolate the effects of physical defects introduced by the implantation process on the corrosion behavior. Implanted and unimplanted coupons were exposed to a mixed gas environment at 700–850°C for times of up to 100 h. The breakdown of preoxidized scales by sulfur was also studied. The scales and the substrates were characterized by scanning electron microscopy combined with energy dispersive X-ray analysis, sputter Auger electron spectroscopy, Rutherford backscattering and transmission electron microscopy. The results showed that there was no significant change in the oxidation kinetics of cerium-implanted Fe25Cr from that of the unimplanted alloy at 700–850°C. Further, the presence of cerium did not enhance the sulfidation resistance at 700°C in a mixed gas environment.
Sign-in/Register to access full text options 
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.
