In this work, the corrosion behaviour of aluminium (Al) and zinc (Zn) sacrificial anodes under AC interference were studied in 3.5% NaCl solution by AC corrosion simulation experiments, weight loss tests and surface morphology analyses. It was found that AC accelerated the corrosion of Al and Zn, and their corrosion rates increased with the AC current density, besides the localised corrosion of Al was much more obvious than Zn. When the AC current density was 100 A m−2, the uniform corrosion rates of Al and Zn increased to 14.6 and 0.46 mm/year, respectively, which were 34.8 and 1.48 times of the free-corrosion rates of them. Meanwhile, both the uniform and localised corrosion rates of Al increased much more significant than that of Zn under AC interference.
FieltschWSilvaD.AC interference risk ranking: case study. Vancouver: NACE; 2016 (Corrosion-2016; Paper No. 7393).
2.
JunkerANielsenLVHeinrichC. Laboratory and field investigation of the effect of the chemical environment on AC corrosion. Phoenix: NACE; 2018 (Corrosion-2018; Paper No. 10844).
3.
LuccaG.Evaluation of sea return impedance and mutual impedance between submarine AC power cables and pipelines. Euro Trans Electr Power. 2011; 21 (1): 273–281.
4.
AdedejiKBPonnleAAAbeBT. AC induced corrosion assessment of buried pipelines near HVTLs: a case study of South Africa. Prog Electromagn Res. 2018; 81: 45–61.
5.
MicuDDChristoforidisGCCzumbilL.AC interference on pipelines due to double circuit power lines: a detailed study. Electr Pow Syst Res. 2013; 103: 1–8.
6.
FuAQChengYF.Effects of alternating current on corrosion of a coated pipeline steel in a chloride-containing carbonate/bicarbonate solution. Corros Sci. 2010; 52 (2): 612–619.
7.
KuangDChengYF.Understand the AC induced pitting corrosion on pipelines in both high pH and neutral pH carbonate/bicarbonate solutions. Corros Sci. 2014; 85: 304–310.
8.
GuoYBMengTWangDG. Experimental research on the corrosion of X series pipeline steels under alternating current interference. Eng Fail Anal. 2017; 78: 87–98.
9.
KouloumbiNBatisGKioupisN. Study of the effect of AC-interference on the cathodic protection of a gas pipeline. Anti-Corros Methods Mater. 2002; 49 (5): 335–345.
10.
XuLYSuXChengYF.Effect of alternating current on cathodic protection on pipelines. Corros Sci. 2013; 66 (1): 263–268.
11.
LindemuthDHernandezHCreeJ. AC mitigation and cathodic protection for a long regulated pipeline. Houston: NACE; 2010 (Corrosion-2010; Paper No. 10105).
12.
DuYXWangLYJiangZT. Study on AC interference mitigation design methods for buried pipelines. Orlando: NACE; 2013 (Corrosion-2013; Paper No. 2444).
FarooqAHamzaMAhmedQ. Evaluating the performance of zinc and aluminum sacrificial anodes in artificial seawater. Electrochim Acta. 2019; 314: 135–141.
15.
TangDZLuMXDuYX. Electrochemical studies on the performance of zinc used for alternating current mitigation. Corrosion. 2015; 71 (6): 795–806.
16.
LuMXTangDZDuYX. Investigation on corrosion of zinc ribbon under alternating current. Corros Eng Sci Technol. 2015; 50 (3): 256–263.
17.
HuLLZhaoXYLiuP. Effect of AC electric field and thickness of electrolyte film on corrosion behavior of A6082-T6 Al alloy. J Chin Soc Corros Prot. 2020; 40 (4): 342–350.
18.
LeeYLOuBLChiuYH.Effect of frequency and current density on AC etching of aluminum electrolytic capacitor foil. J Mater Sci Mater Electron. 2007; 18 (6): 627–634.
19.
GB/T16545-2015. Corrosion of metals and alloys—removal of corrosion products form corrosion test specimens. Beijing: Standards Press of China; 2015.
20.
BounoughazMSalhiEBenzineK. A comparative study of the electrochemical behaviour of Algerian zinc and a zinc from a commercial sacrificial anode. J Mater Sci. 2003; 38 (6): 1139–1145.
21.
CaoCNZhangJQ.An introduction to electrochemical impedance spectroscopy. Beijing: Science Press; 2002.
22.
LiHYKangWLuXC.Effect of age-forming on microstructure, mechanical and corrosion properties of a novel Al–Li alloy. J Alloys Compd. 2015; 640: 210–218.
23.
MccaffertyENatishanPM.Localized breakdown of the natural oxide film on aluminum by chloride ions and the formation of oxide blisters). 218th ECS Meeting, Las Vegas; 2010. p. 47–56.
24.
BargeronCBGivensRB.Precursive blistering in the localized corrosion of aluminum. Corrosion. 1980; 36 (11): 618–625.
25.
MouangaMBercotPRauchJY.Comparison of corrosion behaviour of zinc in NaCl and in NaOH solutions. Part I: corrosion layer characterization. Corros Sci. 2010; 52 (12): 3984–3992.
26.
LideDr.CRC handbook of chemistry and physics. Boca Raton: CRC Press; 1999.
