摘要
采用电化学方法,研究了超级13Cr-N80油管钢电偶对在不同浓度NaCl溶液中的电偶腐蚀行为,采用SEM分析了电偶对中被腐蚀试样的腐蚀形貌,并利用EDS和XRD分析手段分析了其腐蚀产物。结果表明,在不同浓度NaCl溶液中,13Cr与N80之间均存在明显的电位差,13Cr与N80偶接时均发生了不同程度的电偶腐蚀,电偶对中N80作为阳极被加速腐蚀,而13Cr作为阴极得到保护,超级13Cr-N80油管钢电偶对必须对N80防护后方可偶接使用;随着NaCl溶液浓度的增大,超级13Cr-N80油管钢电偶对的电偶电流密度减小,电偶对中N80的腐蚀程度降低,且其表面的腐蚀产物主要由Fe3O4组成。
The corrosion behavior of super 13Cr-N80 steel couples in NaCl solution with different concentrations was investigated by electrochemical method. Corrosion morphologies and products of the couple were analyzed with SEM, EDS and XRD. The results showed that, in different concentrations of NaCl solution, distinct potential difference was found between 13Cr and N80, together with different levels of galvanic corrosion. As anode, N80 was accelerated to corroded, however, 13Cr was protected as cathode when coupled. The super 13Cr-N80 steel couples could not be used without protection of N80. With the increasing of concentration of NaCl solution, corrosion current density of the super 13Cr-N80 steel couples reduced as well as the reduction of corrosion degree of N80, corrosion products of which was Fe3O4.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第12期117-120,共4页
Materials Reports
基金
陕西省科技计划项目(2011K07-01)
