Evaluating the Performance of Aluminum Sacrificial Anodes with Different Concentration of Gallium in Artificial Sea Water

In this manuscript, the influence of gallium content additions of Al-Zn-In-Mg alloy was investigated through electrochemical techniques and microstructure observation in 3.5 wt% NaCl solution. The results indicated that Al-Zn-In-Mg-0.03Ga alloy has the best discharge performance among all alloys. We propose that this is due to the fact that gallium addition to the Al-4Zn-In-Mg alloy improves the discharge activity of the alloy as well as elevating its anodic efficiency. In particular, the effect of gallium addition to improve discharge activity tends to be a parabolic curve, in which there is an increase when the gallium is first added that rises to the maximum anode current efficiency of about 98.25% whenever gallium content is 0.03 wt%.

Automated summary

This manuscript investigates the influence of gallium content additions on Al-Zn-In-Mg alloy in a 3.5 wt% NaCl solution through electrochemical techniques and microstructure observation. The results show that Al-Zn-In-Mg-0.03Ga alloy exhibits the best discharge performance among all alloys. The addition of gallium improves the discharge activity and anodic efficiency of the Al-4Zn-In-Mg alloy. The effect of gallium addition on discharge activity follows a parabolic curve, with the maximum anode current efficiency of about 98.25% achieved at a gallium content of 0.03 wt%.