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Effect of Aging on the Corrosion Resistance of 2209 Duplex Stainless Steel Weldments

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Abstract

In this study, we investigated the correlation between the microstructure and the localized corrosion characteristics for a weld metal made up of 22Cr-9Ni duplex stainless steel (DSS) aged in the range of 400–1000 °C for 30 min. The results showed that changes in the microstructure of the DSS weldments, owing to the formation of precipitates during the aging process, affected its pitting corrosion resistance. The microstructural evolution was found to be extremely sensitive to the secondary phase precipitations such as chi (χ), sigma (σ), chromium nitride (Cr2N), and secondary austenite (γ2) in the aging range of 700–900 °C. The potentiodynamic polarization tests confirmed that the pitting potential representing the corrosion resistance decreased gradually from 500 °C, attained the lowest at 850 °C, and increased again at 900 °C. In addition, the Cr or Mo deficient area around σ phase was transformed into the secondary austenite (γ2) phase during aging where the pitting was found to occur.

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  • 27 February 2019

    The article “Effect of Aging on the Corrosion Resistance of 2209 Duplex Stainless Steel Weldments”, written by Donghoon Kang, Nohoon Kim, and Haewoo Lee, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 02 November 2018 with open access.

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Acknowledgements

This study was supported by the Dong-A university research fund.

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Authors and Affiliations

  1. Technical Research Center, Hyundai Steel Co. Ltd., Dangin, 31719, Republic of Korea

    Donghoon Kang

  2. Department of Materials Science and Engineering, Dong-A University, Busan, 49315, Republic of Korea

    Nohoon Kim & Haewoo Lee

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  1. Donghoon Kang
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  2. Nohoon Kim
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  3. Haewoo Lee
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Correspondence to Haewoo Lee.

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The ​original ​version ​of ​this ​article ​was ​revised: ​The article “Effect of Aging on the Corrosion Resistance of 2209 Duplex Stainless Steel Weldments”, written by Donghoon Kang, Nohoon Kim, and Haewoo Lee, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 02 November 2018 with open access. With the author(s)’ decision to step back from Open Choice, the copyright of the article changed on 27 February 2019 to © The Korean Institute of Metals and Materials 2018 and the article is forthwith distributed under the terms of copyright.

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Kang, D., Kim, N. & Lee, H. Effect of Aging on the Corrosion Resistance of 2209 Duplex Stainless Steel Weldments. Met. Mater. Int. 25, 740–750 (2019). https://doi.org/10.1007/s12540-018-0206-4

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  • DOI: https://doi.org/10.1007/s12540-018-0206-4

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