期刊
CORROSION SCIENCE
卷 135, 期 -, 页码 167-176出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.02.045
关键词
Hydrogen sulfide; High temperature corrosion; Iron oxide; Iron sulfide
资金
- Anadarko
- Baker Hughes
- BP
- Chevron
- China National Offshore Oil Corporation
- CNPC Tubular Goods Research Center
- ConocoPhillips
- DNV GL
- ExxonMobil
- M-I SWACO
- Occidental Oil Company
- Petroleum Institute
- PTT
- Saudi Aramco
- Shell Global Solutions
- SINOPEC
- TOTAL
- TransCanada
- WGK
Recent high temperature H2S corrosion study reported that a thermodynamically less stable iron oxide layer can also form in addition to iron sulfide. In this work, H2S corrosion experiments were conducted at 120 degrees C for different exposure times, ranging from 1 to 21 days. The inner layer was identified by Transmission Electron Microscopy (TEM) as Fe3O4 (magnetite); Fe3O4 was always present over time despite it being less stable than iron sulfide. The observed formation sequence of iron sulfide at high temperature was mackinawite -> troilite -> pyrrhotite -> pyrite. The role of the different corrosion product layers in corrosion is discussed.
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