Study on effect of seawater salinity on electrochemical performance of Al anodes

In compliance with the requirements of the Shengli Oil Field of Shandong, C hina, the effect of seawater salinity (30-5) on the electrochemical propert ies of Al-basis sacrificial anode was studied under laboratory conditions b y the method given in the Chinese National Standard GB4948-85 (Sacrificial Anode of Al-Zn-In System Alloy) [1]. The results showed that there was no o bvious effect when the seawater salinity varied from 30 to 10, but that the anodic open circuit potential, closed circuit potential and current effici ency at seawater salinity of 5 were lower than those given in the Chinese N ational Standard. The variation of seawater salinity must be considered whi le designing marine projects in estuary areas.