The influence of Ga and In on the microstructure and electrochemical performance of a Zn-Al alloy was investigated. It was found that the microstructure of the Zn-Al sacrificial anode can be significantly refined by Ga and In, but excess Ga or In leads to segregation. Electrochemical tests show that Zn-0.5Al-0.07 Ga and Zn-0.5Al-0.1In have the most negative OCPs, the corrosion products of which can easily flake off from the corroded surface, showing the good performance of cathodic protection. A small amount of Ga and In contribute to the corrosion of the Zn-Al alloy; however, excess Ga or In can improve the corrosion resistance of the alloy by refining the grains and making the surface of the oxide film form quickly.
MaJ, WenJ, LiX, . Influence of Mg and Ti on the microstructure and electrochemical performance of aluminium alloy sacrificial anodes. Rare Met. 2009;28:187–192. doi:10.1007/s12598-009-0037-z
WangF, XuJ, XuY, . A comparative investigation on cathodic protections of three sacrificial anodes on chloride-contaminated reinforced concrete. Construction and Building Materials. 2020;246(20):118476-1–118476-10.
4.
LiH, XuZB, ZengJ.Research and development of Al-Zn-In series sacrificial anode alloy. Foundry Technol. 2015;36(6):1337–1341. doi:10.16410/j.issn1000-8365.2015.06.002
5.
SalinasDR, GarcíaSG, BessoneJB.Influence of alloying elements and microstructure on aluminium sacrificial anode performance: case of Al-Zn. J Appl Electrochem. 1999;29(9):1063–1071. doi:10.1023/A:1003684219989
6.
ZhaoHY, BianP, JuDY.Electrochemical performance of magnesium alloy and its application on the sea water battery. J Environ Sci. 2009;21(S1):88–91. doi:10.1016/S1001-0742(09)60045-0
7.
KeyvaniA, SaremiM, SaeriMR.Anodic behavior of Al-Zn-In sacrificial anodes at different concentration of zinc and indium. Int J Mater Res. 2012;103(12):1533–1538. doi:10.3139/146.110817
8.
DelfinoF.Application of EIS to assess the effect of rare earths small addition on the corrosion behaviour of Zn-5% Al (galfan) alloy in neutral aerated sodium chloride solution. Electrochim Acta. 2009;54:1204–1209. doi:10.1016/j.electacta.2008.08.063
9.
HeSR, JiaSC, MaZF.Effects of rare earth on corro⁃sion resistance of Zn-based sacrificial anode materials. Met Funct Mater. 2011;18(5):36.
10.
CaoZY, KongG, CheCS, . Influence of Nd addition on the corrosion behavior of Zn-5%Al alloy in 3.5wt.% NaCl solution. Appl Surf Sci. 2017;426:67–76. doi:10.1016/j.apsusc.2017.07.109
ZhangJP, WangRC, FengY, . Effects of Hg and Ga on microstructures and electrochemical corrosion behaviors of Mg anode alloys. Trans Nonferrous Met Soc China. 2012;22(12):3039–3045. doi:10.1016/S1003-6326(11)61568-9
13.
DilerE, RouvellouB, RioualS, . Characterization of corrosion products of Zn and Zn-Mg-Al coated steel in a marine atmosphere. Corros Sci. 2014;87:111–117. doi:10.1016/j.corsci.2014.06.017
14.
WuPP, SongGL, ZhuYX, . Intelligentization of traditional sacrificial anode Zn by Mg-alloying for reinforcing steel. Corros Sci. 2022;194:109943. doi:10.1016/j.corsci.2021.109943
15.
MuňozAG, SaidmanSB, BessoneJB.Corrosion of an Al-Zn-In alloy in chloride media. Corros Sci. 2002;44(10):2171–2182. doi:10.1016/S0010-938X(02)00042-2
16.
MohedanoM, BlawertC, YasakauKA, . Characterization and corrosion behavior of binary Mg-Ga alloys. Mater Charact. 2017;128:85–99. doi:10.1016/j.matchar.2017.03.040
17.
FarooqQ.Evaluating the performance of zinc and aluminium sacrificial anodes in artificial seawater. Electrochim Acta. 2019;314:135–141. doi:10.1016/j.electacta.2019.05.067
18.
MondolfoLF.Effect of interfacial energies on heterogeneous nucleation. Mater Sci Technol. 1989;5(2):118–122. doi:10.1179/mst.1989.5.2.118
19.
LongP, LiQ.F.Study on corrosion mechanism of Zn-Al-Cd anodes in hot sea water. Corros Sci Prot Technol. 2007;19(4):235–238. doi:10.1016/S1872-2040(07)60059-0
20.
WangFP, CaoL, LiuZB, . Protective performance of Zn-Al-Cd alloy sacrificial anode for 20# steel. Corros Sci Prot Technol. 2015;27(5):431–436. doi:10.11903/1002.6495.2014.371
21.
SongXX, ZhangJ, YangDF, . Effects of microorganism on corrosion of Zn-Al-Cd sacrificial anode in natural seawater. J Mater Eng. 2013;356(1):58–63. doi:10.3969/j.issn.1001-4381.2013.01.012
22.
ShayebHA EI, Abd EI WahabFM, . Effect of gallium ions on the electrochemical behaviour of Al, Al-Sn, Al-Zn and Al-Zn-Sn alloys in chloride solutions. Corros Sci. 2001;43(4):643–654. doi:10.1016/S0010-938X(00)00100-1
23.
LuoJ, ZhangY, ZhongQD, . Influence of grain size on corrosion resistant of commonly used metals. Corros Prot. 2012;33(4):349–352.
24.
GancarzT, MechK, GuspielJ, . Corrosion studies of Li, Na and Si doped Zn-Al alloy immersed in NaCl solutions. J Alloys Compd. 2018;767:1225–1237. doi:10.1016/j.jallcom.2018.07.109
25.
TongJB, LiangY, WeiSC, . Microstructure and corrosion resistance of Zn-Al diffusion layer on 45 steel aided by mechanical energy. Materials (Basel). 2019;12(18):3032. doi:10.3390/ma12183032
26.
LiW, YanYG, ChenG, . Effect of alloy elements on electrochemical performance of aluminium sacrificial anode. J Chin Soc Corros Prot. 2012;32(2):127–132. doi:10.1007/s11783-011-0280-z
27.
ZhouHB, LiangM, LvDS, . Electrochemical behaviors of zinc-indium alloy electroplating in alkaline solutions. Acta Metall Sinica. 2011;47(8):1055–1060. doi:10.3724/SP.J.1037.2011.00080
28.
CaiM, ParkSM.Oxidation of zinc in alkaline solutions studied by electrochemical impedance spectroscopy. Electrochem Soc. 1996;143(12):3895–3902. doi:10.1149/1.1837313
