3003铝合金翅片在冷却液中耐蚀性的研究  

Study on anticorrosion property of 3003 aluminum alloy fin in coolant

作　　者：唐洪 李季 汪广武 文玉良 潘心宇[1] 刘建伟 吴凡 周城良 罗小虎 刘娅莉[1] TANG Hong;LI Ji;WANG Guangwu;WEN Yuliang;PAN Xinyu;LIU Jianwei;WU Fan;ZHOU Chengliang;LUO Xiaohu;LIU Yali(Department of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China;不详)

机构地区：[1]湖南大学化学化工学院,湖南长沙410082 [2]岳阳高澜节能装备制造有限公司,湖南岳阳414000 [3]广州高澜节能技术股份有限公司,广东广州510000 [4]黔南民族师范学院化学化工学院,贵州都匀558000

出　　处：《电镀与涂饰》2020年第10期587-594,共8页Electroplating & Finishing

基　　金：国家自然科学基金(51871097);湖南省自然科学基金(2019JJ40033)。

摘　　要：采用电感耦合等离子体质谱(ICP-MS)、金相显微镜、扫描电镜(SEM)等技术分析了风力发电机用冷却液使用前后离子种类和浓度的变化对3003铝合金耐蚀性的影响。在3.5%NaCl溶液中以动电位极化曲线和电化学阻抗谱(EIS)研究了单宁酸、鸟嘌呤、2−氨基噻唑、葡甘露聚糖、二乙基二硫代氨基甲酸钠等缓蚀剂对3003铝合金的缓蚀性能。结果显示2−氨基噻唑最好,缓蚀效率高达90.3%。分别以上述5种缓蚀剂为锂铝类水滑石(LiAl-LDHs)的插层剂,通过水热法在3003铝合金表面制备出不同的LiAl-LDHs/缓蚀剂复合转化膜。电化学测量结果显示,LiAl-LDHs/2−氨基噻唑复合转化膜的耐蚀性最好,且比单独使用2−氨基噻唑缓蚀剂或LiAl-LDHs转化膜时强。The effects of the changes in ion species and their concentrations in a coolant for wind turbine before and after being used on corrosion resistance of 3003 aluminum alloy were analyzed by inductively coupled plasma-mass spectrometry(ICP-MS),metallography,and scanning electron microscopy(SEM).The corrosion inhibition properties of tannic acid,guanine,2-aminothiazole,glucomannan,and sodium diethyldithiocarbamate to 3003 aluminum alloy in 3.5%NaCl solution were studied by potentiodynamic polarization measurement and electrochemical impedance spectroscopy(EIS).The results showed that 2-aminothiazole was the best with an inhibition efficiency up to 90.3%.The said corrosion inhibitors were used as an intercalator of lithium aluminum-layered double hydroxides(LiAl-LDHs),forming five types of LiAl-LDHs/inhibitor composite conversion films hydrothermally on 3003 aluminum alloy.The results of electrochemical measurements showed that the LiAl-LDHs/2-aminothiazole composite conversion film had the best corrosion resistance,better than the LiAl-LDHs conversion film and 2-aminothiazole used individually.

关 键 词：铝合金 冷却液 2−氨基噻唑 缓蚀剂 锂铝类水滑石 水热合成 电化学 

分 类 号：TG178[金属学及工艺—金属表面处理]