%0 Journal Article
%T ELECTROCHEMICAL NOISE CHARACTERISTICS OF METASTABLE PITING OF 16Mn MILD STEEL<br>用电化学噪声研究16Mn钢的亚稳态孔蚀特征
%A DONG Zehua
%A GUO Xingpeng
%A ZHENG Jiashen
%A XU Liming
%A <br>董泽华
%A 郭兴蓬
%A 郑家shen
%J 腐蚀科学与防护技术
%D 2001
%I 
%X The fluctuation of potential and current of 16Mn carbon steel were monitored in NaHCO 3+Na 2CO 3 aqueous solution with and without 0.5 mol/L Cl -.Noise current and noise potential patterns were experimentally observed which related to the incubation and die of metastable pitting,where the "transient" in ECN had generally characteristic of "fast down and slow recovery".The amplitude and lifetime of transient in ECN increased when addition of 0.5 mol/L NaCl.In addition,Surface potential and current mapping on passive film of 16Mn steel was also measured simultaneously by wire beam electrode,and the result showed the number of surface active points increased with addition of Cl -.Furthermore,dynamic potential scanning indicated that the addition of 0.5M Cl - would cause the passive film breakdown at more negative potential.
%K electrochemical noise
%K 16Mn steel
%K wire beam electrode
%K metastable pitting
%K passive film<br>电化学噪声
%K 丝束
%K 电极
%K 亚稳态点蚀
%K 钝化膜
%K 孔蚀
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=9F6E6EC8BA5BB62698F6640073DDD6E1&aid=77906935D884070B&yid=14E7EF987E4155E6&vid=FC0714F8D2EB605D&iid=E158A972A605785F&sid=64963996248CBF47&eid=FEF02B4635FE8227&journal_id=1002-6495&journal_name=腐蚀科学与防护技术&referenced_num=5&reference_num=11