Mechanistic investigation of hydrogen-enhanced anodic dissolution of X-70 pipe steel and its implication on near-neutral pH SCC of pipelines
作者： MC Li , YF Cheng , None
DOI: 10.1016/J.ELECTACTA.2007.07.015
关键词:
摘要: Abstract The effects of hydrogen-charging on anodic dissolution pipe steel under near-neutral pH condition were studied by electrochemical techniques. Hydrogen-charging enhances the rate steel. hydrogen-enhanced increases with increasing charging current density. hydrogen effect is attributed to alteration chemical potential and exchange density affects corrosion process In particular, at a high density, layer product forms electrode surface change interfacial double-charge capacitance as well charge-transfer resistance. factor for enhanced an −0.4 V (SCE) 1.53 only. Hydrogen-enhanced itself may not be major contributing crack growth in electrolyte. A further investigation synergistic stress crack-tip essential determine mechanism cracking pipelines.
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