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...

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Bibliographic Details
Published inCoatings (Basel) Vol. 12; no. 1; p. 53
Main Authors Xi, Yuntao, Jia, Mao, Zhang, Jun, Zhang, Wanli, Yang, Daoyong, Sun, Liang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2022
Subjects
Alloys
Aluminum
Cathodic protection
Corrosion potential
Current efficiency
Discharge
Efficiency
Electrodes
Electrolytes
Gallium
Magnesium base alloys
Performance evaluation
Sacrificial anodes
Seawater
Test methods
Zinc
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Summary: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%.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12010053