X80管线钢在海滨盐碱土壤模拟溶液中的耐腐蚀性能研究  

Corrosion Resistance of X80 Pipeline Steel in Simulated Solution of Seaside Saline-Alkali Soil

作　　者：胥聪敏[1] 国蓉[2] 胡海军[3] 戚东涛[4] 

机构地区：[1]西安石油大学材料科学与工程学院材料加工工程重点实验室,西安710065 [2]西安工业大学,西安710032 [3]西安交通大学,西安710049 [4]中国石油天然气集团公司管材研究所,西安710065

出　　处：《钢铁研究学报》2010年第3期42-46,共5页Journal of Iron and Steel Research

基　　金：西安石油大学科技创新基金资助项目(YS29030518)

摘　　要：采用失重法、电化学测试、SEM及XRD微观分析等方法,研究了X80管线钢在海滨盐碱土壤模拟溶液中的耐腐蚀性能。结果表明,在海滨盐碱土壤模拟溶液中,随着浸泡时间的增加,X80钢平均腐蚀速率明显下降,但总的腐蚀程度增加,钢基体表面由以全面腐蚀为主转为以点蚀为主;X80钢的阴极过程为氧的活化控制;腐蚀产物主要由FeOOH(表层)和Fe3O4(内层)组成;X80钢的耐蚀性及腐蚀形态与各试样表面生成的腐蚀产物膜的完整性和致密性有关。研究还发现氯离子含量是影响腐蚀的主导因素。The corrosion resistance of X80 pipeline steel was investigated in simulated solution of saline-alkali soil by using weight loss method, electrochemical measurement, scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results show the average corrosion rate of X80 steel decrease obviously, and corrosion tendency increases, this is induced by change of corrosion morphology from uniform corrosion to pitting corrosion. The cathodic progress is dominated by oxygen activation control. The corrosion products are almost FeOOH （surface layer） and Fe3O4 （inner layer）. The corrosion resistance and corrosion morphology of X80 steel samples have close relationship with the integrality and compactness of corrosion product films. The content of Cl- dominates the corrosion severity.

关 键 词：X80管线钢 耐腐蚀性能 海滨盐碱土壤 模拟溶液 腐蚀产物 

分 类 号：TG172.4[金属学及工艺—金属表面处理]