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Improvement of hydrogen permeation barrier performance by iron sulphide surface films

查看全文 作　　者：Pengpeng [1]Bai;Shaowei [2]Li;Jie [3]Cheng;Xiangli [1]Wen;Shuqi [4]Zheng;Changfeng [4]Chen;Yu [1]Tian 高影响力作者 机构地区：[1]State Key Laboratory of Tribology,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;[2]School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;[3]School of Mechanical Electronic&Information Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;[4]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China高影响力机构 出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2023年第30卷第9期,共9页高影响力期刊 基　　金：financailly supported by the National Natural Science Foundation of China (Nos.52275198 and 51805292);the Beijing Natural Science Foundation,China(No.2202020);the Tribology Science Fund of State Key Laboratory of Tribology,China (No.SKLT2022B11)。 摘　　要：Fe–S compounds with hexagonal crystal structure are potential hydrogen permeation barrier during H2S corrosion. Hexagonal system Fe–S films were prepared on carbon steel through corrosion and CVD deposition, and the barrier effect of different Fe–S films on hydrogen permeation was tested using electrochemical hydrogen permeation method. After that, the electrical properties of Fe–S compound during phase transformation were measured using thermoelectric measurement system. Results show that the mackinawite has no obvious barrier effect on hydrogen penetration, as a p-type semiconductor, and pyrrhotite (including troilite) has obvious barrier effect on hydrogen penetration,as an n-type semiconductor. Hydrogen permeation tests showed peak permeation performance when the surface was deposited with a continuous film of pyrrhotite (Fe_(1–x)S) and troilite. The FeS compounds suppressed hydrogen permeation by the promotion of the hydrogen evolution reaction, semiconducting inversion from p-to n-type, and the migration of ions at the interface. 关 键 词：hydrogen permeation barrier iron sulfide PYRRHOTITE SEMICONDUCTOR
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