%0 Journal Article
%T EXFOLIATION CORROSION BEHAVIOR OF T6 TREATED 2090 Al-Li ALLOY IN EXCO SOLUTION AND EIS DURING EXFOLIATION CORROSION EVOLUTION<br>T6态2090 Al-Li合金在EXCO溶液中的剥蚀行为和剥蚀发展过程中的电化学阻抗谱
%A SU Jingxin
%A ZHANG Zhao
%A CAO Fahe
%A ZHANG Jianqing
%A CAO Chunan
%A <br>苏景新
%A 张 昭
%A 曹发和
%A 张鉴清
%A 曹楚南
%J 金属学报
%D 2005
%I 
%X Electrochemical impedance spectroscopy (EIS) and in situ microscopic image of T6 peak-aged AA2090 Al-Li alloys in EXCO solution were studied. The localized corrosion form of the alloy during immersion evolved from pitting through intergranular corrosion, exfoliation corrosion (EC) to post EC. EC initiated at big corrosion pits which were formed with inclusion phase as center in pitting stage. The EC blisters propagate from these big pits till the upper layer is totally lifted. EIS of the initiation stage of pitting corrosion consists of a high frequency capacitive arc and a middlelow frequency inductive arc, and the inductive arc tends to disappear when pitting corrosion starts to propagate. In the intergranular corrosion stage, the second time constant corresponding to the corroded area can hardly be distinguished in the capacitive part of the EIS. In the stages of EC propagation and post EC, their EIS consist of two capacitive arcs.
%K Al-Li alloy
%K electrochemical impedance spectroscopy (EIS)
%K EXCO solution
%K exfoliation corrosion<br>Al-Li合金
%K 电化学阻抗谱
%K EXCO溶液
%K 剥蚀
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=1DCF8CEFA1C9B1F9&yid=2DD7160C83D0ACED&vid=2001E0D53B7B80EC&iid=9CF7A0430CBB2DFD&sid=3A9B6DFDAB34D091&eid=32491EEEE0A8C927&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=14