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Effects of Relative Humidity on Crevice Corrosion Behavior of 304L Stainless-Steel Nuclear Material in a Chloride Environment

Institute of Nuclear Energy Research (INER), 1000 Wenhua Rd., Longtan District, Taoyuan City 32546, Taiwan
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Metals 2019, 9(11), 1185; https://doi.org/10.3390/met9111185
Received: 7 October 2019 / Revised: 28 October 2019 / Accepted: 31 October 2019 / Published: 3 November 2019
In the dry cask storage of spent nuclear fuels, a stainless-steel canister acts as an important barrier for encapsulating spent fuels. As a result, local corrosion behavior of 304L stainless steel has become an issue of concern in the wet coastal region and salt spray environment. The test was conducted after deposition of simulated sea salt particles on the 304L stainless-steel specimen. It was first covered with a crevice former, and then kept at 45 °C with a relative humidity of 45%, 55%, and 70%, respectively. The surface morphologies and electron back scatter diffraction (EBSD) analysis of the corroded region for the 304L stainless-steel specimen are presented in this paper. The goal of this work was to investigate the crevice corrosion behavior of 304L stainless steel under different chloride concentrations and relative humidity conditions. From the experimental results, a threshold relative humidity for stress corrosion cracking (SCC) initiation of 304L stainless steel was proposed. View Full-Text
Keywords: austenitic stainless steel; crevice corrosion; stress corrosion cracking; chloride environment austenitic stainless steel; crevice corrosion; stress corrosion cracking; chloride environment
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Yeh, C.-P.; Tsai, K.-C.; Huang, J.-Y. Effects of Relative Humidity on Crevice Corrosion Behavior of 304L Stainless-Steel Nuclear Material in a Chloride Environment. Metals 2019, 9, 1185.

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