Electrochemical hydrogen permeation tests were performed to measure the hydrogen permeation current through the X-65 pipeline steel in the electrolytes simulating the soil conditions to initiate near-neutral pH stress corrosion cracking (SCC) in pipelines. The hydrogen permeation current was analyzed following the constant concentration model. It is shown that, AQDS, simulating the organic compound in the soil, inhibits hydrogen permeation by decreasing the sub-surface hydrogen concentration, while sulfide promotes hydrogen permeation by inhibiting the hydrogen recombination and thus increasing the sub-surface hydrogen concentration. The steel specimen is more susceptible to stress corrosion cracking in the soil solution with a higher sub-surface hydrogen concentration, indicating that hydrogen is involved in near-neutral pH SCC in pipelines. It is suggested that hydrogen promotes the cracking of the steel, accompanying with the anodic dissolution on the crack sides and at the crack tip.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Analysis of electrochemical hydrogen permeation through X-65 pipeline steel and its implications on pipeline stress corrosion cracking


    Additional title:

    Analyse der elektrochemischen Wasserstoffpermeation durch X-65-Pipeline-Stahl und deren Bedeutung für die Spannungsrisskorrosion von Pipelines


    Contributors:
    Cheng, Y.F. (author)

    Published in:

    Publication date :

    2007


    Size :

    8 Seiten, 12 Bilder, 4 Tabellen, 24 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    Monitoring stress corrosion cracking in a working gas pipeline

    Khoroshikh, A.V. / Kremlev, V.V. / Surkov, Y.P. et al. | Tema Archive | 1999



    New technique monitors pipeline corrosion, cracking

    Strommen, R.D. / Horn, H. / Wold, K.R. | Tema Archive | 1993