Influence of temperature on electrochemical corrosion

behavior of X80 pipeline and its weld joint XIE Fei,XU Chang- hao,WANG Dan,WU Ming,WANG Hai- yan,XIE Hong- yu

Iron and Steel ›› 2015, Vol. 50 ›› Issue (8) : 89-94.

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Iron and Steel ›› 2015, Vol. 50 ›› Issue (8) : 89-94. DOI: 10.13228/j.boyuan.issn0449-749x.20140661

Influence of temperature on electrochemical corrosion

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Abstract

Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) technology were used to study the effect of temperature on electrochemical corrosion behavior of X80 pipeline steel and its weld joint in simulated Ku’erle soil solution. The results showed that the corrosion current density of X80 steel first increased and then decreased with the increase of temperature. Moreover,the increase of the amplitude gradually narrowed. When the temperature was 80 ℃,there was a peak value on charge transfer resistance,and the corrosion behavior of the metal was the most intense at this time. When the temperature was 90 ℃,electrode corrosion reaction was restrained,the corrosion rate decreased observably. The corrosion of weld joint part was more than other part of the steel at the same temperature.

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XIE Fei, XU Zhang-Gao, YU Dan, et al. Influence of temperature on electrochemical corrosion[J]. Iron and Steel, 2015, 50(8): 89-94 https://doi.org/10.13228/j.boyuan.issn0449-749x.20140661

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