%0 Journal Article
%T Corrosion Behavior of AZ91D Magnesium Alloy in City Atmosphere<br>Mg合金AZ91D在城市大气环境中的腐蚀行为
%A LIN Cui
%A LI Xiaogang
%A LI Ming
%A WANG Fengping
%A <br>林 翠
%A 李晓刚
%A 李 明
%A 王凤平
%J 金属学报
%D 2004
%I 
%X The surface morphology of corrosion layer, corrosion products and structure of rust layer for AZ91D magnesium alloy in natural city atmosphere were studied by SEM and XRD. The results show that Mg(OH)2 layer forms at the initial corrosion period, then film thickens and cracks appear with continued corrosion under cyclic wet/dry conditions, in the end these cracks develop to reticulate structure. The water vapour is easily condensed and the corrosives gases, salt particles are easily absorbed in the cracks. Meanwhile, the cracks provide the diffusion paths for oxygen and other corrosion pollutants into matrix, which results in severe local corrosion. The major corrosion products are Mg(OH)2, Al(OH)3, Mg2CO3(OH)2 3H2O and Mg2(OH)3Cl 4H2O, which plays a partial role in protecting the matrix, therefore slowing down the average corrosion rate of magnesium alloy in the latter periods.
%K city atmosphere
%K magnesium alloy
%K corrosion behavior<br>城市大气环境
%K Mg台金
%K 腐蚀行为
%K AZ91D
%K 腐蚀速率
%K 腐蚀层形貌
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=C88F7E4C8AC5E3A4&yid=D0E58B75BFD8E51C&vid=1371F55DA51B6E64&iid=0B39A22176CE99FB&sid=AC1578C6BB9EBDEF&eid=E0F6F365E4766526&journal_id=0412-1961&journal_name=金属学报&referenced_num=6&reference_num=8