%0 Journal Article
%T Micro-arc Oxidation and Sol-Gel Composite Coatings on Magnesium Alloy<br>镁合金微弧氧化—溶胶凝胶复合膜层的耐蚀性
%A SHANG Wei CHEN Baizhen SHI Xichang WEN Yuqing College of Metallurgical Science
%A Engineering
%A Central South University
%A Changsha College of Chemistry
%A Bioengineering
%A Guilin University of Technology
%A Guilin
%A <br>尚伟
%A 陈白珍
%A 石西昌
%A 温玉清
%J 材料研究学报
%D 2011
%I 
%X Protective composite coatings were obtained on a magnesium alloy by micro–arc oxidation (MAO) and sol–gel technique. The cross–section morphologies and composition of the MAO coating and composite coatings were analyzed by scanning electron microscopy (SEM) and energy dispersive X–rays (EDX). The phase structure of the composite coatings was analyzed by X–ray diffractometer (XRD). The corrosion resistance of MAO coating and composite coatings in a 3.5% (mass fraction) NaCl solution was evaluated by potentiodynamic polarisation measures. The results show that SiO2–ZrO2 sol can effectively seal the micropores in the MAO coating, and the composite coatings are more compact and have good adhesion. The composite coatings are composed of MgO, MgAl2O4, SiO2 and ZrO2. The corrosion resistance of the sample with composite coatings is enhanced significantly.
%K materials failure and protection
%K magnesium alloy
%K micro&ndash
%K arc oxidation
%K sol&ndash
%K gel
%K composite coatings
%K corrosion resistance<br>材料失效与保护
%K 镁合金
%K 微弧氧化
%K 溶胶凝胶
%K 复合膜层
%K 耐蚀性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=3924FE186C90DEE40B5A06FD8FED0E82&yid=9377ED8094509821&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=11B4E5CC8CDD3201&eid=BFE7933E5EEA150D&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=0