%0 Journal Article
%T PROPERTIES OF SURFACE FILM FORMED ON X70 PIPELINE STEEL IN HCO3^-/CO3^2- ENVIRONMENT<br>X70管线钢在HCO-3/CO2-3体系中表面膜性能研究
%A Hu Gang
%A Xu ChunChun
%A Chi Lin
%A Wang ZiSe
%A <br>胡钢
%A 许淳淳
%A 池琳
%A 王紫色
%J 腐蚀科学与防护技术
%D 2005
%I 
%X The electrochemical behavior of X70 pipeline steel in 0.5 mol/LNa_2CO_3+1 mol/LNaHCO_3 solution has been studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods.X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to examine the composition and morphologies of the surface film.The results showed that there were two anodic peaks appeared at -600 mV and -350 mV respectively in the process of anodic polarization.For the surface film formed at -600 mV,the reaction resistance of electrode surface was small,it was mainly consisted of FeCO_3?Fe_2(OH)_2CO_3 and FeOOH.There were many hollows and microcracks existed in the film.The film was metastable and poorly protective.For the film formed at -350 mV,the reaction resistance of electrode surface was big,it was mainly consisted of Fe_2O_3 and Fe_3O_4 and it has good protectiveness.
%K X70 pipeline steel
%K surface film
%K electrochemical impedance spectroscopy (EIS)
%K X-ray photoelectron spectroscopy (XPS)
%K scanning electron microscopy (SEM)<br>X70管线钢
%K 表面膜
%K 交流阻抗（EIS）
%K X光电子能谱（XPS）
%K 扫面电镜（SEM）
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=9F6E6EC8BA5BB62698F6640073DDD6E1&aid=FF54E17CEA1D8D5E4B9542D67B724951&yid=2DD7160C83D0ACED&vid=BCA2697F357F2001&iid=94C357A881DFC066&sid=717CC18E05F2AFA0&eid=9DC563A0FEFC04F9&journal_id=1002-6495&journal_name=腐蚀科学与防护技术&referenced_num=0&reference_num=12