کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1468359 | 1509985 | 2016 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: EIS analysis on stress corrosion initiation of pipeline steel under disbonded coating in near-neutral pH simulated soil electrolyte EIS analysis on stress corrosion initiation of pipeline steel under disbonded coating in near-neutral pH simulated soil electrolyte](/preview/png/1468359.png)
• EIS is useful for mechanistic study of corrosion process under disbonded coating.
• Pipeline steels under disbonded coating is in an active dissolution state.
• Yield stress enhances pitting corrosion and microcracks under disbonded coating.
• Corrosion rate shows a decreasing trend over distance from coating defect.
• CO2 gradient is responsible for corrosion scenarios under disbonded coating.
Initiation of stress corrosion of X80 high strength low alloy (HSLA) pipeline steel in a near-neutral pH environment was investigated in a crevice cell simulating coating disbondment. Multi specimens were loaded simultaneously by a loading frame. EIS was applied to characterize behavior of SCC and local electrochemical process. Results indicate that the steel under disbonded coating is in an active dissolution state. In-depth profile of the reciprocal charge transfer resistance shows a decreasing trend over distance from the opening. A shielding factor was proposed to characterize shielding effect of disbondment on stress corrosion of pipeline steels.
Journal: Corrosion Science - Volume 110, September 2016, Pages 23–34