平面接触型Cu/Al设备线夹的腐蚀  

Corrosion of Cu/Al Plane Contact Type Terminal Connector

作　　者：陈国宏[1] 汤晓磊[2] 刘俊建[1] 王家庆[1] 张涛[1] 汤文明[2] 

机构地区：[1]安徽省电力科学研究院,合肥230601 [2]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《腐蚀与防护》2014年第2期142-145,149,共5页Corrosion & Protection

基　　金：国家电网科技项目(2012QTXM0751)

摘　　要：采用超声波浸Sn-Pb合金钎焊技术制备平面接触型Cu/Al设备线夹。通过7dNaCl盐雾试验,研究了Cu/Al设备线夹腐蚀产物的相组成、腐蚀断面结构、腐蚀机理以及腐蚀过程对线夹电学性能的影响。结果表明,Cu/Al设备线夹的腐蚀主要是铝板与Sn-Pb合金钎料间电化学腐蚀的结果。腐蚀产物组成复杂,主要是铝和锡的氧化物、氢氧化物和碱式氯化物盐。腐蚀断裂位于铝板/Sn-Pb合金钎料界面。随着腐蚀时间的延长,Cu/Al设备线夹的电阻率明显升高。Cu/Al plane contact type terminal connectors were produced by ultrasonic dip soldering technique. The phases and microstructure of the corrosion products, corrosion mechanism and effect of the corrosion process on the electrical property of the Cu/Al terminal connector were studied through a 7 days NaCl salt spray experiment. The results show that corrosion of the Cu/Al terminal connector mainly resulted from the galvanic corrosion between Al plate and Sn-Pb alloy solder. The corrosion products were complicated, mainly including oxides, hydroxides and alkaline chlorides of Al and Sn. Corrosion cracks of the connector located at the Al plate/the Sn-Pb alloy solder interface. The electrical resistivity of the connector increased obviously as the corrosion time increased.

关 键 词：CU Al设备线夹 盐雾腐蚀 腐蚀产物 腐蚀机理 

分 类 号：TG172.3[金属学及工艺—金属表面处理]