The alternating current (AC) has a strong influence on the corrosion of carbon steel Q235 in soil. AC corrosion1-3 was investigated by morphology observation, weight loss analysis and electrochemical measurement. The results of morphology observation and weight loss analysis showed that AC increased the corrosion rate and the influence was weakened when a protective layer was built up. The electrochemical tests confirmed that in the presence of AC, the corrosion potential shifted toward the negative direction and the exchange current density increased.4-9
VoûteC.-HStalderF: ‘Influence of soil composition on the spread resistance and of A.C. corrosion on cathodically protected measuring probes’; 2000BruxellesCeoCor (Committee on the Study of Pipe Corrosion and Protection) International Congress.
2.
NielsenLV: ‘Role of alkalization in AC induced corrosion of pipelines and consequences hereof in relation to CP requirements’CORROSION/05Houston, TX, USA2005NACE.
3.
BertocciU: ‘AC induced corrosion: the effect of an alternating voltage on electrodes under charge-transfer control’Corrosion197935(5)211–215.
4.
ChinD.-TVenkateshS: ‘A study of alternating voltage modulation on the polarization of mild steel’J. Electrochem. Soc.1979126(11)1908–1913.
5.
LalvaniSBLinXA: ‘A theoretical approach for predicting AC-induced corrosion’Corros. Sci.199436(6)1039–1046.
6.
LalvaniSBLinX: ‘A revised model for predicting corrosion of materials induced by alternating voltages’Corros. Sci.199638(10)1709–1719.
7.
XiaoHLalvaniSB: ‘A linear model of alternating voltage-induced corrosion’J. Electrochem. Soc.2008155(2)69–74.
BrennaADiamantiMVLazzariLOrmelleseM: ‘A proposal of AC corrosion mechanism in cathodic protection’Technical Proc. NSTI Nanotechnology Conf. and ExpoBoston, MA, USA2011553–556.
10.
ZhangRVairavanathanPRLalvaniSB: ‘Perturbation method analysis of AC-induced corrosion’Corros. Sci.2008501664–1671.
11.
AED: ‘AC interference and accelerated pipeline cor-rosion in utility corridors-an alternative perspective to the root causes’CorrosionHouston, TX, USANACE20066159–6161.
12.
BertoliniLCarsanaMPedeferriP: ‘Corrosion behaviour of steel in concrete in the presence of stray current’Corros. Sci.2007471056–1068.
13.
WBR FBW: ‘A theoretical study of AC-induced corrosion considering diffusion phenomena’Corros. Sci.199840(2)323–336.
14.
KimD.-KMuralidharanSHaT.-H: ‘Electrochemical studies on the alternating current corrosion of mild steel under cathodic protection condition in marine environments’Electrochim. Acta2006515259–5267.
15.
AJD: ‘Effect of alternating current on corrosion of low alloy and carbon steels’Corrosion197834(12)428–433.
16.
TCD WFT: ‘Corrosion by alternating current: a study of the anodic polarization of mild steel in Na2SO4 solution’Corrosion35(11)514–523.
