用于提高Mg-Gd-Y镁合金微弧氧化复合涂层服役性能的硅烷纳米自组装渗透剂 第二部分:植酸催化体系

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• 英文论文题名：A Self-assembled Nanoparticle Penetrant Used for Increasing Service Performance of Composite PEO Film Coated on Mg-Gd-Y Mg Alloy Part Two:PhyticAcid
• 论文作者：郭兴华 ; 杜克勤 ; 王艳秋 ; 邵亚薇 ; 王荣 ; 王福会
• 英文论文作者：GUO Xing-hua ; DU Ke-qin ; WANG Yan-qiu ; SHAO Ya-wei ; WANG Rong ; WANG Fu-hui ; State Key Laboratory for Corrosion and Protection ; Institute of Metal Research ; Chinese Academy of Science ; College of materials science and chemical engineering ; Harbin Engineering University ; The Ningbo Branch of Ordnance Science of China
• 年：2012
• 作者机构：中国科学院金属研究所金属腐蚀与防护国家重点实验室;哈尔滨工程大学材科科学与化学工程学院;中国兵器工业集团第五二研究所;
• 论文关键词：植酸 ; 纳米自组装 ; 渗透剂 ; Mg-Gd-Y
• 英文论文关键词：phyticacid ; self-assembled ; penetrant ; Mg-Gd-Y
• 会议召开时间：2012-07-25
• 会议录名称：第十七届全国缓蚀剂学术讨论会论文集
• 语种：中文
• 分类号：TG174.4
• 学会代码：ZGHA
• 会议名称：第十七届全国缓蚀剂学术讨论及应用技术经验交流会
• 会议地点：中国重庆
• 主办单位：中国腐蚀与防护学会缓蚀剂专业委员会
• 学会名称：中国腐蚀与防护学会缓蚀剂专业委员会
• 页数：4
• 文件大小：611k
• 原文格式：O
• 会议级别：全国

摘要

以植酸作为水解催化剂,针对Mg-Gd-Y镁合金微弧氧化膜合成了一种新型改性硅烷纳米自组装渗透剂。通过采用电化学阻抗谱(EIS)对镁合金微弧氧化层-改性渗透层-氟碳复合涂层在3.5%NaCl溶液中的浸泡腐蚀检测表明:Mg-Gd-Y镁合金微弧氧化膜经植酸改性的硅烷纳米自组装渗透剂处理后,复合涂层的耐蚀性显著提高,服役寿命大大延长。主要原因如下:酸性较弱的植酸对镁合金微弧氧化膜的腐蚀大大减小;对于镁合金基体植酸是一种性能优良的缓蚀剂。在浸泡的后期,植酸能在镁合金表面形成一层保护膜,有效地缓解了腐蚀介质对镁合金基体的侵蚀。
In this paper,aself-assembled nanoparticle penetrant was used for PEO composite film coated on Mg-Gd-Y magnesium alloy,which was modified by the catalyzer of phyticacid.Corrosion protection of the modified composite coating of PEO/penetrant/fluorocarbon was evaluated by EIS in the practical environment of 3.5%NaCl solution for long-term immersion time.The results showed an obvious increase of corrosion protection for this modified composite coating after long-term immersion process,and its practical time was also extensively prolonged.The main reasons were as follows:firstly,the weak acidity of phytic acid can reduce the corrosion of PEO film;Secondly,phytic acid as a good inhibitor for Mg-Gd-Y Mg substrate alloy,a protective film can be formed on the surface of Mg substrate by phytic acid during the later immersion time,which can relieve the corrosion problem of Mg substrate by corrosive particles.

引文

[1]郭兴华,安茂忠,杨培霞,等.SNAP溶胶组成对镁合金涂层耐蚀性的影响[J].无机化学学报,2009,25(7):1254-1261.
    [2]Guo X H,An M Z,Yang P X,et al.Property characterization and formation mechanism of anticorrosion film coated on AZ31B Mg alloy by SNAP technology[J].Journal of Sol-Gel Science and Technology,2009,52(3):335-347.
    [3]Guo X H,An M Z.Experimental study of electrochemical corrosion behaviour of bilayer on AZ31B Mg alloy[J].Corrosion Science,2010,52(12):4017-4027.