温度对X80管线钢及其焊缝腐蚀行为的影响

doi:10. 13228/j. boyuan. issn0449- 749x. 20140661

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摘要利用动电位极化和交流阻抗技术研究了温度因素对X80管线钢及其焊缝在库尔勒土壤模拟溶液中电化学腐蚀行为的影响。结果表明：随着温度的升高，试样腐蚀电流密度呈现先增大后减小的趋势，而且增大的幅度逐渐缩小。当温度为80 ℃时，电荷转移电阻Rt出现极小值，此时试样腐蚀现象最严重。当温度为90 ℃时，电极腐蚀反应受到抑制，金属腐蚀速率明显减小；相同温度下，X80管线钢焊缝的腐蚀程度高于母材，焊缝耐腐蚀性能较差。

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	谢飞
	许长浩
	王丹
	吴明
	王海燕
	谢宏宇

关键词 ： X80管线钢, 焊缝, 温度, 腐蚀电化学, 模拟溶液

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.

收稿日期: 2014-11-13 出版日期: 2015-08-18

PACS:

TG172

引用本文:

谢飞，许长浩，王丹，吴明，王海燕，谢宏宇. 温度对X80管线钢及其焊缝腐蚀行为的影响[J]. 钢铁, 2015, 50(8): 89-94. behavior of X80 pipeline and its weld joint XIE Fei，XU Chang- hao，WANG Dan，WU Ming,WANG Hai- yan，XIE Hong- yu. Influence of temperature on electrochemical corrosion. Iron and Steel, 2015, 50(8): 89-94.

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