Electrochemical Behavior of A516 Carbon Steel in Solutions Containing Hydrogen Sulfide

H. H. Huang, Wen-Ta Tsai, J. T. Lee

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

The electrochemical behavior of A516 grade 70 (UNS K02700) carbon steel with a ferrite-pearlite structure in acidic chloride (Cl-) solutions containing hydrogen sulfide (H2S) at 25°C was investigated by electrochemical impedance spectroscopy (EIS). Results showed the impedance of A516 steel increased in an acidic Cl- solution with H2S (compared to a solution without H2S) at the open-circuit potential (OCP). The corrosion process for A516 steel in the H2S-containing solution was in two stages. Polarization resistance (Rp) initially increased with time for immersion up to ∼ 10 h but then decreased gradually. In the early stage, the impedance was characterized by one large semicircle in the Nyquist plot that increased with time for immersion up to 3 h. In the later stage, precipitation of a sulfide film modified the surface properties and led to variation in EIS data through a capacitive effect in the low-frequency region.

原文English
頁(從 - 到)708-713
頁數6
期刊Corrosion
52
發行號9
DOIs
出版狀態Published - 1996 一月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)
  • 材料科學(全部)

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