Corrosion Behavior of 316H in NaCl-KCl-MgCl<sub>2</sub> Molten Salt

LIU Huajian; CHEN Bingchuan; AI Hua; YANG Xinmei; ZHOU Xingtai

doi:10.11973/fsyfh-202307012

Corrosion & Protection > 2023 > 44(7): 69-74. > DOI: 10.11973/fsyfh-202307012

LIU Huajian, CHEN Bingchuan, AI Hua, YANG Xinmei, ZHOU Xingtai. Corrosion Behavior of 316H in NaCl-KCl-MgCl₂ Molten Salt[J]. Corrosion & Protection, 2023, 44(7): 69-74. DOI: 10.11973/fsyfh-202307012

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Corrosion Behavior of 316H in NaCl-KCl-MgCl₂ Molten Salt

1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

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Received Date: June 19, 2022

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The corrosion behavior of 316H (stainless steel) in 700 ℃ chloride molten salt was systematically studied using a combination of static corrosion test and dynamic corrosion test. The results showed that after 1 000 hours of static corrosion, 316H exhibited significant intergranular corrosion in the unpurified molten salt, with a corrosion depth about 80 μm. In purified molten salt, the corrosion of 316H was relatively weak, and the surface of the sample after corrosion had a Cr deficient layer about 3 μm thick. After dynamic dynamic corrosion, the thickness of the Cr deficient layer on the surface of the sample was about 6 μm. Adding metal Mg to the chloride molten salt could effectively suppress the intergranular corrosion of 316H.
- 316H stainless steel,
- high temperature,
- chloride molten salt,
- dynamic corrosion,
- corrosion protection

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Corrosion Behavior of 316H in NaCl-KCl-MgCl₂ Molten Salt