Al-Bi-Pb-In-Ga合金牺牲阳极的组织与电化学性能研究

MICROSTRUCTURE AND ELECTROCHEMICAL PROPERTIES OF AN Al-Bi-Pb-In-Ga SACRIFICIAL ANODE

研制了一种Al-Bi-Pb-In-Ga合金牺牲阳极;用恒电流法研究了合金在自来水、淡海水、人造海水介质中的电化学性能;用金相显微技术和扫描电子显微技术观察牺牲阳极的微观组织和腐蚀后的表面形貌;结果表明,合金化元素均匀弥散分布的Al-Bi-Pb-ln-Ga合金牺牲阳极在自来水、淡海水、人造海水介质中腐蚀溶解均匀,阳极极化弱,电极电位负,阳极利用率高。

A type of Al-Bi-Pb-In-Ga sacrificial anode has been developed. The electrochemical characteristics, microstructure and surface morphology of the Al alloy anode in tap water, diluted sea water and artifical sea water solution have been studied by using electrochemical, SEM and metallographic methods. The results showed that the alloying elements were dispersed uniformly. The anodic polarization was weak and the stable potential was negative. The Al alloy can be used efficiently as a sacrificial anode.