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CHANG Wei, WANG Bei, LI Dapeng, TIAN Yongqin, LI Xiaqiao, WANG Maomao, ZHANG Lei. Under-Deposit Corrosion Behavior of 316L Stainless Steel Pipelines for CO2 Transport[J]. Corrosion & Protection, 2023, 44(11): 35-39,80. DOI: 10.11973/fsyfh-202311007
Citation: CHANG Wei, WANG Bei, LI Dapeng, TIAN Yongqin, LI Xiaqiao, WANG Maomao, ZHANG Lei. Under-Deposit Corrosion Behavior of 316L Stainless Steel Pipelines for CO2 Transport[J]. Corrosion & Protection, 2023, 44(11): 35-39,80. DOI: 10.11973/fsyfh-202311007

Under-Deposit Corrosion Behavior of 316L Stainless Steel Pipelines for CO2 Transport

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  • Received Date: November 30, 2021
  • To clarify the under-deposit corrosion behavior of 316L stainless steel pipelines for CO2 transport, electrochemical tests and high-temperature and high-pressure immersion tests for 316L stainless steel were carried out in a simulated under-deposit corrosion environment. The results showed that sand and CaCO3 deposits increased the under-deposit corrosion sensitivity and reduced the re-passivation performance of 316L stainless steel. Sand deposits caused sub-stable pitting corrosion, and thick CaCO3 deposits reduced the free corrosion potential of the steel. 316L stainless steel had a good under-deposit corrosion resistance at 100 ℃ and 5 MPa CO2. But the steel was at a risk of under-deposit corrosion when the deposits formed a suitable crevice with the material. It is necessary to pay attention to prevent and remove deposits on 316L stainless steel pipeline in the corrosion environment of high-temperature and high CO2 partial pressure.
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