|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Oil and Gas and AMREE Oil & Gas III
||Development of Cr-based Duplex Alloy for Corrosive Environments II: Evaluation of Corrosion Resistance in Boiling Sulfuric Acid
||Tomonori Kimura, Masahumi Nojima, Makoto Ogata, Naoya Tokoo, Kosuke Kuwabara
|On-Site Speaker (Planned)
Cr based duplex alloys (CrDA) with high wear and corrosion resistance have been developed as alternative alloys to bearing cladding alloys such as stellite 6. The developed alloys contain over 37 wt.% of Cr to form passivation film and to have duplex microstructure composed of α phase and γ phase. In order to evaluate their corrosion resistance necessary for cladding alloys in Oil&Gas instruments, corrosion tests in boiling 5% sulfuric acid were performed for the 9 alloys having different compositions as shown in the former presentation. The corrosion rates of developed alloys were lower than that of stellite 6. The corrosion behavior of CrDA was classified into the selective corrosion of α phase, that could be suppressed when α phase contained over 51 wt.% of Cr.
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