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Comparative Analysis on Corrosion Behavior of 316SS and 304SS in Subcritical and Supercritical Aqueous Systems

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Abstract:

The corrosion characteristics of 316SS and 304SS in subcritical and supercritical aqueous systems including chloride of approximate 4600 mg/L at 25 MPa and 250 °C, 350 °C, 425 °C, and 520 °C are comparatively investigated. Some local corrosion areas occurred on the surfaces of SS316, not on that of 304SS, at 250 °C and 425 °C, while at 350 °C, all the sample surfaces were covered by large amounts of corrosion products and clay materials due to the predominant precipitation for the formation of the outer subscale. Whether in reducing subcritical and supercritical industrial sludge suspension or in oxidizing supercritical sludge system, 304SS owns better corrosion resistance than 316SS due to higher chromium concentration of former.

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Periodical:

Key Engineering Materials (Volume 777)

Pages:

381-385

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.777.381

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Online since:

August 2018

Authors:

Tong Tong Xu*, Yan Hui Li

Keywords:

304 Stainless Steel, 316 Stainless Steel, Chloride, Corrosion, Subcritical Aqueous System, Supercritical Aqueous System

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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