Effects of stray AC on corrosion of 3-layer polyethylene coated X70 pipeline steel and cathodic delamination of coating with defects in 3.5 wt-% NaCl solution
Restricted accessResearch articleFirst published online May, 2018
Effects of stray AC on corrosion of 3-layer polyethylene coated X70 pipeline steel and cathodic delamination of coating with defects in 3.5 wt-% NaCl solution
In this work, the effects of stray alternating current (AC) on the corrosion of coated X70 pipeline steel and the delamination of 3-layer polyethylene (3PE) coatings with defects were investigated using COMSOL Multiphysics simulation, electrochemical impedance spectroscopy and three-dimensional (3D) digital microscope techniques. The results showed that under the same level of AC interference, pits with deeper maximum pit depth were observed at the smaller defect areas than those at larger defect areas. It was consistent with the simulation results that a greater corrosion current density was accompanied on samples with smaller defects. According to 3D digital images, the larger delamination of 3PE coatings was found on samples with smaller defects. With the increase of current density, the impedance of samples with small defects decreased, while that of samples with large defects increased. Additionally, with the same defect size, the maximum pit depth became deeper and the corrosion was more severe.
XuSYLiW.Research on stray current corrosion evaluation of buried metallic pipeline in an urban rail transit system. Int J Electrochem Sci. 2015; 10 (7): 5950–5960.
2.
ZhuMDuCWLiXGEffect of AC current density on stress corrosion cracking behavior of X80 pipeline steel in high pH carbonate/bicarbonate solution. Electrochim Acta. 2014; 117 (4): 351–359. doi: 10.1016/j.electacta.2013.11.149
3.
ChenZGQinCKTangJXExperiment research of dynamic stray current interference on buried gas pipeline from urban rail transit. J Natl Gas Sci Eng. 2013; 15 (6): 76–81. doi: 10.1016/j.jngse.2013.09.003
4.
WangXHTangXHWangLWSynergistic effect of stray current and stress on corrosion of API X65 steel. J Natl Gas Sci Eng. 2014; 21 (21): 474–480. doi: 10.1016/j.jngse.2014.09.007
5.
CaoALZhuQJZhangSTBP neural network predictive model for stray current density of a buried metallic pipeline. Anti-Corros Methods Mater. 2013; 57 (5): 234–237.
6.
AllahkaramSRIsakhani-ZakariaMDerakhshaniMInvestigation on corrosion rate and a novel corrosion criterion for gas pipelines affected by dynamic stray current. J Natl Gas Sci Eng. 2015; 26: 453–460. doi: 10.1016/j.jngse.2015.06.044
7.
BertoliniLCarsanaMPedeferriP.Corrosion behaviour of steel in concrete in the presence of stray current. Corros Sci. 2007; 49 (3): 1056–1068. doi: 10.1016/j.corsci.2006.05.048
8.
SolgaardAOSCarsanaMGeikerMrExperimental observations of stray current effects on steel fibres embedded in mortar. Corros Sci. 2013; 74: 1–12. doi: 10.1016/j.corsci.2013.03.014
9.
HosokawaYKajiyamaFFukuokaT.Alternating current corrosion risk arising from alternating current-powered rail transit systems on cathodically protected buried steel pipelines and its measures. Corrosion. 2004; 60 (4): 408–413. doi: 10.5006/1.3287751
10.
FloydR.Testing and Mitigation of AC Corrosion on 8 Line: A Field Study. Corrosion, Paper 210, NACE, New Orleans, Louisiana; 2004.
11.
JiangZTDuYXDongLEffect of AC current on corrosion potential of Q235 steel. Acta Metall Sin. 2011; 47 (8): 997–1002.
12.
DongLLuMXDuYXInvestigation progress of alternating current corrosion on buried pipelines. J Chinese Soc Corros Prot. 2011; 31 (3): 173–178.
13.
KuangDChengYF.Effect of alternating current interference on coating disbondment and cathodic protection shielding on pipelines. Corros Eng Sci Technol. 2015; 50 (3): 211–217. doi: 10.1179/1743278214Y.0000000246
14.
DaiNWZhangJXChenQMEffect of the direct current electric field on the initial corrosion of steel in simulated industrial atmospheric environment. Corros Sci. 2015; 99: 295–303. doi: 10.1016/j.corsci.2015.07.029
15.
JiangZDuYLuM.New findings on the factors accelerating AC corrosion of buried pipeline. Corros Sci. 2014; 81 (81): 1–10. doi: 10.1016/j.corsci.2013.09.005
16.
GoidanichSLazzariLOrmelleseM.AC corrosion – part 1: effects on overpotentials of anodic and cathodic processes. Corros Sci. 2010; 52 (2): 491–497. doi: 10.1016/j.corsci.2009.10.005
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. doi: 10.1016/j.corsci.2009.10.022
19.
SamsudinMSFDell'OlioMLeongKH.Adhesives performance of 3-layer PE pipe coatings: effects of MAH loading, PE particles size, coating interval time and service temperature. Prog Org Coat. 2016; 99: 157–165. doi: 10.1016/j.porgcoat.2016.05.013
20.
AmbigerC.Influence of substrate of the carbon contents and coating thickness on scratch and wear resistance of AlCrN films. Mat Sci Eng A. 2016; 161 (1): 105–117.
21.
AdhikariSUnocicKAZhaiYHexafluorozirconic acid based surface pretreatments: characterization and performance assessment. Electrochim Acta. 2011; 56 (4): 1912–1924. doi: 10.1016/j.electacta.2010.07.037
22.
KhunNWFrankelGS.Effects of surface roughness, texture and polymer degradation on cathodic delamination of epoxy coated steel samples. Corros Sci. 2013; 67 (67): 152–160. doi: 10.1016/j.corsci.2012.10.014
23.
RamezanzadehBAhmadiAMahdavianM.Enhancement of the corrosion protection performance and cathodic delamination resistance of epoxy coating through treatment of steel substrate by a novel nanometric sol-gel based silane composite film filled with functionalized graphene oxide nanosheets. Corros Sci. 2016; 109: 182–205. doi: 10.1016/j.corsci.2016.04.004
24.
BiHSykesJ.Cathodic disbonding of an unpigmented epoxy coating on mild steel under semi- and full-immersion conditions. Corros Sci. 2011; 53 (10): 3416–3425. doi: 10.1016/j.corsci.2011.06.021
25.
KhunNWFrankelGS.Cathodic delamination of polyurethane/multiwalled carbon nanotube composite coatings from steel substrates. Prog Org Coat. 2016; 99: 55–60. doi: 10.1016/j.porgcoat.2016.05.002
26.
MontoyaRGarcia-GalvanFRJimenez-MoralesA.A cathodic delamination study of coatings with and without mechanical defects. Corros Sci. 2014; 82 (5): 432–436. doi: 10.1016/j.corsci.2014.01.007
27.
GuillauminVLandoltD.Effect of dispersion agent on the degradation of a water borne paint on steel studied by scanning acoustic microscopy and impedance. Corros Sci. 2002; 44 (1): 179–189. doi: 10.1016/S0010-938X(01)00028-2
28.
ZhangT.Influence factors of cathodic disbonding of 3PE coating on buried pipelines [master's thesis]. Sichuan: Sichuan University of Science and Engineering; 2012.
29.
WangAH.Mechanisms and influences of the rail transit stray current corrosion on the critical infrastructure [master's thesis]. Shenzhen: Harbin Institute of Technology; 2015.
30.
LinCHDuhJG.Electrochemical impedance spectroscopy (EIS) study on corrosion performance of CrAlSiN coated steels in 3.5 wt.% NaCl solution. Surf Coat Techn. 2009; 204 (6): 784–787. doi: 10.1016/j.surfcoat.2009.09.059
31.
WangHJWangJWangWThe study of the varying characteristics of cathodic regions for defective coating in 3.5% sodium chloride solution by EIS and WBE. J Ocean Univ China. 2015; 14 (2): 269–276. doi: 10.1007/s11802-015-2542-z
32.
ZhongCTangXChengYF.Corrosion of steel under the defected coating studied by localized electrochemical impedance spectroscopy. Electrochim Acta. 2008; 53 (14): 4740–4747. doi: 10.1016/j.electacta.2008.02.014
33.
WeijdeDHVDWestingEPMVWitJHWD.EIS measurements on artificial blisters in organic coatings. Electrochim Acta. 1996; 41 (7): 1103–1107. doi: 10.1016/0013-4686(95)00444-0
34.
WalknerSHasselAW.Combined chemical and EIS study of the reaction of zinc coatings under alkaline conditions. Electrochim Acta. 2014; 131 (1): 130–136. doi: 10.1016/j.electacta.2013.12.177
35.
LeeSHOhWKKimJG.Acceleration and quantitative evaluation of degradation for corrosion protective coatings on buried pipeline: part II. Application to the evaluation of polyethylene and coal-tar enamel coatings. Prog Org Coat. 2013; 76 (4): 784–789. doi: 10.1016/j.porgcoat.2012.12.006
36.
KimHGAhnSHKimJG.Corrosion performance of diamond-like carbon (DLC)-coated Ti alloy in the simulated body fluid environment. Diamond Relat Mater. 2005; 14 (1): 35–41. doi: 10.1016/j.diamond.2004.06.034
37.
WangXHTangXHWangLWCorrosion behavior of X80 pipeline steel under coupling effect of stress and stray current. Int J Electrochem Sci. 2014; 9 (8): 4574–4588.
38.
LiYCXuCZhangRHEffects of stray AC interference on corrosion behavior of X70 pipeline steel in a simulated marine soil solution. Int J Electrochem Sci. 2017; 12 (3): 1829–1845. doi: 10.20964/2017.03.18
39.
BrahimITribolletBTakenoutiHAC-induced corrosion of underground steel pipelines. Faradaic rectification under cathodic protection: I. Theoretical approach with negligible electrolyte resistance. J Braz Chem Soc. 2015; 26 (1): 799–801.
40.
GuoYBMengTWangDExperimental research on the corrosion of X series pipeline steels under alternating current interference. Eng Fail Anal. 2017; 78: 87–98. doi: 10.1016/j.engfailanal.2017.03.003
41.
BarilGBlancCKeddamMLocal electrochemical impedance spectroscopy applied to the corrosion behavior of an AZ91 magnesium alloy. J Electrochem Soc. 2003; 150 (10): 488–493. doi: 10.1149/1.1602080
42.
WenLWangYMLiuYEIS study of a self-repairing microarc oxidation coating. Corros Sci. 2011; 53 (2): 618–623. doi: 10.1016/j.corsci.2010.10.010
43.
CaoAL.Protection against stray current corrosion of buried metals pipeline [dissertation]. Chongqing: Chongqing University; 2010.
44.
ZhangY.Study on cathodic delamination behavior under damaged coatings by means of array electrode techniques [master's thesis]. Qingdao: Ocean University of China; 2015.
