<正> The effect of trace elements Bi and Ti on the electrochemical property of aluminium sacrificial anode in seawater was studied . Different amounts of Bi and Ti were alloyed with Al-Zn-In to make 9 types of aluminium sacrificial anodes . Anode closed circuit potential, discharge capacities and current efficiencies were measured in the laboratory . The results show that the effect of Bi is greater than that of Ti.