Improvement of hydrogen permeation barrier performance by iron sulphide surface films  

作　　者：Pengpeng Bai Shaowei Li Jie Cheng Xiangli Wen Shuqi Zheng Changfeng Chen Yu Tian 

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

出　　处：《International Journal of Minerals,Metallurgy and Materials》2023年第9期1792-1800,共9页矿物冶金与材料学报（英文版）

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 

分 类 号：TG174.4[金属学及工艺—金属表面处理]