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Effect of Magnetic Field on the Electrochemical Corrosion Behavior of X70 Pipeline Steel

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  • (1. College of Petroleum Engineering,Liaoning Petrochemical University,Fushun 113001,China;2. PetroChina Planning and Engineering Institute,Beijing 100083,China;3. PetroChina Oil,Gas & New Energies Company,Beijing 100007,China)
XIE Fei (1983-),Ph.D.,Professor,Research Focus: Oil and Gas Pipeline Corrosion Engineering and Safety Assurance Technology,Tel.: 13942359915,E-mail:xiefei0413@ 163.com

Received date: 2023-11-14

  Revised date: 2023-12-19

  Accepted date: 2023-12-25

  Online published: 2024-05-31

Supported by

National Natural Science Foundation of China Funded Projects(52274062)

Abstract

To investigate the effect of magnetic field on the electrochemical corrosion behavior of X70 pipeline steel and the effect of magnetic field on the corrosion behavior of X70 steel after immersed in Kuerle soil simulation solution, the electrochemical corrosion behavior of pipeline steel under different magnetic field strengths, directions and the presence or absence of product films was analyzed by electrochemical tests, immersion tests and metallographic analysis. Results showed that as the magnetic field strength increased, the corrosion rate of X70 steel first increased and then decreased. Changing the direction of the magnetic field had no significant effect on the electrochemical corrosion behavior of X70 steel. The corrosion trend of X70 pipeline steel was the same in both cases after immersed for 3 and 5 d, respectively, and the corrosion rate increased with the increase of external magnetic field. Moreover, the adsorption resistance of X70 steel with a product film on its surface was higher than that without a product film, and the X70 steel with the product film exhibited lower corrosion current density and lighter corrosion degree. However, different immersing times had little effect on the corrosion current density.

Cite this article

CHEN Xu, GUO Dacheng, LIU Fugang, XIE Fei . Effect of Magnetic Field on the Electrochemical Corrosion Behavior of X70 Pipeline Steel[J]. Materials Protection, 2024 , 57(5) : 33 -41 . DOI: 10.16577/j.issn.1001-1560.2024.0099

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