Wednesday, March 19, 2008 - 3:25 PM
Convention Center, Second Level, R08 (Ernest N. Morial Convention Center)
08412

Influence of H2S and CO2 Corrosion Scales on Hydrogen Permeation in X65 Steel

Jianwei Yang, Corrosion and Protection Center; Lei Zhang, University of Science & Technology; Minxu Lu, Univ of Sci & Tech Beijing; Lining Xu, University of Science & Technology Beijing

In the pipelines transporting wet gas containing with H2S and CO2, electrochemical corrosion will occur as well as Hydrogen Induced Cracking (HIC). The presence of H2S and CO2 corrosion scales would influence the permeating process of hydrogen into the steel. The influences of scale covering on hydrogen entry into steel were detected in electrochemistry cell for hydrogen permeation. Perfect covering of corrosion scale retarded hydrogen permeation but loose corrosion scale improved it. The H2S and CO2 concentration in solutions could also influence the hydrogen entry process.

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