焊管Issue(10)：16-21,6.
X80管线钢管在5%NaCl+0.5%醋酸溶液中的腐蚀行为研究
Study on Corrosion Behavior of X80 Pipeline Steel in 5%NaCl+0.5%Acetum
摘要
Abstract
The corrosion behavior of X80 pipeline steel base metal and weld specimens were studied by potentiodynamic polarization,electrochemical impendence spectroscopy and immersion test in 5%NaCl+0.5%acetum. The result showed that the open circuit potential of the weld sample is more positive than the base metal sample. The process of electrochemical corrosion is activation-controlled and the weld sample is with a high corrosion rate. The electrochemical impendence spectroscopy presents two time constants,the polarization resistance of base metal is higher than that of weld joint. The average corrosion rate from the immersion test decreases gradually with the immersion time increasing, but serious selective corrosion appear on the weld zone.关键词
管线钢/开路电位/动电位极化/电化学阻抗谱/浸泡试验Key words
pipeline steel/open circuit potential/potentiodynamic polarization/electrochemical impendence spectroscopy/immersion test分类
能源科技引用本文复制引用
林海威,刘明,王荣,杨爱民..X80管线钢管在5%NaCl+0.5%醋酸溶液中的腐蚀行为研究[J].焊管,2013,(10):16-21,6.基金项目
陕西省重点学科资助项目（YS30230203）。 （）
