高温高湿环境轨道交通用铝合金涂层室外与室内腐蚀老化的相关性研究  

Correlation of Aging Behaviour Exposed in Hot and Humid Environment and Assessed by Indoor Accelerated Test for Protective Coating on Al-alloy Used for Rail Transit

作　　者：林化强 赵民 段文超[2,3] 韦涛 史洪微[2] 刘常升[3] 刘福春 韩恩厚[2] LIN Huaqiang;ZHAO Min;DUAN Wenchao;WEI Tao;SHI Hongwei;LIU Changsheng;LIU Fuchun;HAN En-Hou(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,青岛266111 [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,沈阳110016 [3]东北大学材料科学与工程学院,沈阳110819

出　　处：《腐蚀科学与防护技术》2018年第4期375-380,共6页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(51571202);企业合作项目(SF/GY-梁字-2014-489)~~

摘　　要：研究了轨道交通用铝合金防护涂层在典型高温高湿地区(广州)的自然环境腐蚀老化和室内加速腐蚀老化的相关性。室内加速腐蚀老化采用氙灯老化+湿热实验+盐雾实验组合方法。考察了两种条件下实验过程中涂层的光泽、色差和红外光谱变化。室内加速腐蚀老化6个周期与自然环境腐蚀老化2 a的结果表明,依据色差判断室外和室内腐蚀老化的相关性最佳,光泽次之,红外光谱无明显相关性。根据色差的结果可以得出如下规律,室内腐蚀老化3个周期后,采用广州地区环境谱进行室内加速老化实验1个周期色差值变化相当于在广州地区自然环境曝露实验10个月左右。The correlation of aging behaviour of protective coating on Al-alloy used for rail transit in the area of hot and humid（such as Guangzhou area） was studied comparatively with that assessed by indoor accelerated test. The combination of aging induced by Xenon lamp radiation, humidity cabinet test and salt spraying test was used as an indoor accelerated aging method. While the evolution of gloss, colour difference and infrared spectrogram of the coatings were monitored in the two test processes. After 6 cycles of indoor accelerated aging and outdoor exposure for 2 a, the results indicate that the change of colour difference presents the best correlation between the two tests methods, and it takes the second place for gloss. No correlation could be found from the change of infrared spectrograms. It can be peculiarly concluded that the change of colour difference induced by 1 cycle indoor test corresponding to an equivalent environment spectrum designed for Guangzhou area is close to that induced by the real outdoor exposure in Guangzhou area for 10 months.

关 键 词：铝合金 有机涂层 老化 光泽 色差 红外光谱 

分 类 号：TG174[金属学及工艺—金属表面处理]