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Metals and Materials International

, Volume 11, Issue 2, pp 135–140 | Cite as

Effect of temperature on anodic behavior of 13Cr martensitic steel in CO2 environment

  • G. X. Zhao
  • M. Zheng
  • X. H. Lv
  • X. H. Dong
  • H. L. Li
Article

Abstract

The corrosion behavior of 13Cr martensitic stainless steel in a CO2 environment in a stimulated oilfield was studied with potentiodynamic polarization and the impedance spectra technique. The results showed that the microstructure of the surface scale clearly changed with temperature. This decreased the sensitivity of pitting corrosion and increased the tendency toward general (or uniform) corrosion. The capacitance, the charge transfer resistance, and the polarization resistance of the corrosion product scale decrease with increasing temperature from 90 to 120 °C, and thus the corrosion is a thermal activation controlled process. Charge transfer through the scale is difficult and the corrosion is controlled by a diffusion process at a temperature of 150 °C. Resistance charge transfer through the corrosion product layer is higher than that in the passive film.

Keywords

CO2 corrosion 13Cr martensitic stainless steel electrochemical impedance spectra 

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Copyright information

© Springer 2005

Authors and Affiliations

  • G. X. Zhao
    • 1
    • 2
  • M. Zheng
    • 1
  • X. H. Lv
    • 2
  • X. H. Dong
    • 2
  • H. L. Li
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringXi'an Jiaotong UniversityXi'anP. R. China
  2. 2.Tubular Goods Research Center of CNPCXi'anP. R. China

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