Corrosion Behavior of 316L Stainless Steel and Alloy 625 in Supercritical Water Oxidation for Coking Wastewater Treatment

Yu Zhen Wang; Shu Zhong Wang; Yang Guo; Dong Hai Xu; Xin Ying Tang; Guang Xin Yu; Hang Yu

doi:10.4028/www.scientific.net/AMM.316-317.1037

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 316-317Corrosion Behavior of 316L Stainless Steel and...

Corrosion Behavior of 316L Stainless Steel and Alloy 625 in Supercritical Water Oxidation for Coking Wastewater Treatment

Abstract:

The corrosion behavior of 316L stainless steel and alloy 625 were deteced in superciritical water oxidation (SCWO) process for coking wastewater treatment. The operation conditions were 500 °C, 25 MPa, oxygen ratio of 3.5 and the reaction time of 150 h. Surface morphologies of metal samples, oxide structure and compositions across the oxide thickness of the metal samples after SCWO were analyzed using SEM and ESD, and the corrosion rates for both samples were obtained. Pitting corrosion was found on the surface of 316L stainless steel with a corrosion rate of 0.334 mm/a. While no remarkable corrosion was found on the surface of alloy 625, and the corrosion rate is 0.052 mm/a.

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Periodical:

Applied Mechanics and Materials (Volumes 316-317)

Pages:

1037-1040

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.316-317.1037

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Online since:

April 2013

Authors:

Yu Zhen Wang, Shu Zhong Wang, Yang Guo, Dong Hai Xu, Xin Ying Tang, Guang Xin Yu, Hang Yu

Keywords:

316L Stainless Steel, Alloy 625, Coking Wastewater, Corrosion, Supercritical Water Oxidation

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References

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