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ZHANG Zhenghai, YANG Guirong, SONG Wenming, MA Ying, LI Yamin. Effect of CO2 Pressure on Corrosion Behavior of 20 Steel in CO2/AqueousTwo-Phase Stratified Flow Liquid Phase Medium[J]. Materials and Mechanical Engineering, 2020, 44(10): 33-37,42. DOI: 10.11973/jxgccl202010007
Citation: ZHANG Zhenghai, YANG Guirong, SONG Wenming, MA Ying, LI Yamin. Effect of CO2 Pressure on Corrosion Behavior of 20 Steel in CO2/AqueousTwo-Phase Stratified Flow Liquid Phase Medium[J]. Materials and Mechanical Engineering, 2020, 44(10): 33-37,42. DOI: 10.11973/jxgccl202010007
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Effect of CO2 Pressure on Corrosion Behavior of 20 Steel in CO2/AqueousTwo-Phase Stratified Flow Liquid Phase Medium

  • 1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;

  • 2. Lanpec Technologies Limited, Lanzhou 730070, China

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  • Received Date: November 10, 2019
  • Revised Date: September 01, 2020
    Graphical Abstract
    • Abstract
  • The effect of CO2 pressure (0.03-0.26 MPa) on corrosion behavior of 20 steel in CO2/aqueous two-phase stratified flow liquid phase medium was studied by weight loss method, scanning electron microscopy, and X-ray diffraction. The results show that the corrosion rate of 20 steel increased rapidly when the CO2 pressure increased from 0.03 MPa to 0.11 MPa, and the corrosion rate increased slowly after the CO2 pressure exceeded 0.11 MPa. The corrosion rates of 20 steel under different test conditions were greater than 1.193 mm·a-1, indicating that 20 steel was severely corroded. 20 steel surface was covered with uniform and loose floc corrosion products, and a net floc structure was formed. The corrosion products mainly consisted of iron oxidation and FeCO3. With the increase of CO2 pressure, the compactness of the corrosion product film increased, the particle size of the corrosion products decreased, and the morphology of the corrosion product changed from flocculent, needle-like, and granular to scaly.
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    • References (17)
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