高速列车用不饱和聚酯腻子的耐蚀性和老化机理  

Corrosion Resistance and Aging Mechanism of Unsaturated Polyester Putty for High-Speed Train

作　　者：梁国平 李春霖 李丽 王浩 王伟 史洪微[2,4] 刘福春 韩恩厚[2] LIANG Guoping;LI Chunlin;LI Li;WANG Hao;WANG Wei;SHI Hongwei;LIU Fuchun;HAN Enhou(Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;CRRC Qingdao Sifang Co.,Ltd.,Qingdao 26611l,China;School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室,沈阳110819 [2]中国科学院金属研究所中国科学院核用材料与安全评价重点实验室,青岛266111 [3]中车青岛四方机车车辆股份有限公司,沈阳110016 [4]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《腐蚀与防护》2024年第1期34-40,共7页Corrosion & Protection

基　　金：国家自然科学基金(52171089)。

摘　　要：利用电化学阻抗谱、湿热老化等方法研究了不饱和聚酯腻子的耐蚀性和老化机理。结果表明:在3.5%NaCl溶液中浸泡6 h后,腐蚀溶液便渗入腻子/铝合金界面,并发生电化学腐蚀,不饱和聚酯腻子阻抗下降明显,防护能力下降较快;在湿热老化过程中,不饱和聚酯腻子光泽和色差逐渐增加,表面随着树脂的老化和降解变得光滑且局部产生空洞;不饱和聚酯腻子在老化初期存在着后固化现象;老化和降解更容易在芳香酯的位置发生。The corrosion resistance and aging mechanism of unsaturated polyester putty were investigated using electrochemical impedance spectroscopy and accelerated hydrothermal aging test.The results show that the electrolyte solution penetrated into the putty/aluminum alloy interface and electrochemical corrosion occurred after immersing in 3.5 wt.%NaCl solution for 6 hours.The impedance of unsaturated polyester putty decreased significantly and the protection ability of unsaturated polyester putty decreased rapidly.In the process of hydrothermal aging,the surface of unsaturated polyester putty became smooth with the aging and degradation of resin.The aging and degradation of resin also caused localized holes on the surface of unsaturated polyester putty,and the gloss and color difference increased gradually.Unsaturated polyester putty had post-curing phenomenon at the initial stage of aging,and aging and degradation were more prone to occur at the position of aromatic ester.

关 键 词：不饱和聚酯腻子 铝合金 电化学阻抗谱 湿热老化 傅里叶变换红外光谱 

分 类 号：TG174.4[金属学及工艺—金属表面处理]