Electrochemical study of the corrosion rate of carbon steel in soil: Evolution with time and determination of residual corrosion rates under cathodic protection

Barbalat, M.; Lanarde, L.; Caron, D.; Meyer, Michel; Vittonato, Jean; Castillon, François; Fontaine, S.; Refait, Philippe

doi:10.1016/j.corsci.2011.10.031

Cited by 88 publications

(49 citation statements)

References 21 publications

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“…Although pH, chloride and sulfate concentration and the resulting resistivity of the soil at the test location are considered between mildly and very mildly corrosive, according to ASTM G187-12 26 , the mean corrosion rate during 100 days is nearly one order of magnitude above the value considered acceptable for buried pipelines under cathodic protection (0,01mm/year). The measured values are in reasonable agreement with weight loss measurements from Barbalat et al 27 , who found a corrosion rate around 0,1mm/year during 75 days in a soil with similar characteristics. Figure 7 shows the Raman shift spectra acquired on the AISI 1020 after an exposure time of 64 days connected to the power line tower.…”

Section: Resultssupporting

confidence: 80%

Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

et al. 2014

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Soil corrosion of carbon steel samples buried up to hundred days close to a high voltage power transmission line tower was examined by weight loss vs. time. A higher weight loss was observed if the samples were electrically connected to the tower than if they were not. This was attributed to the influence of alternating current (AC) signals induced in the soil by the transmission line. This field study showed for the first time the influence of the AC power line on the buried structure of the tower, while other studies so far were focused only on AC corrosion of cathodically protected coated pipelines, running parallel to the transmission line. An improved method was used to measure weight loss by descaling in Clark solution. The new method substitutes discontinuous measurements, proposed in the ASTM-G1-90 standard, by in situ measurements of the weight loss during descaling, using a computer controlled microbalance.

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Section: Resultssupporting

confidence: 80%

Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

et al. 2014

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“…Corrosion current has therefore long been considered an important research subject for corrosion researchers. A number of techniques have been developed and widely applied in various fields, including nuclear power systems [2][3][4], the petrochemical industry [5][6][7][8][9], aviation and space flight [10], and the construction of reinforced concrete structures [11][12][13][14][15]. These techniques can be classified into two types: non-electrochemical and electrochemical measurements.…”

Section: Introductionmentioning

confidence: 99%

“…Many electrochemical techniques for estimating corrosion kinetic parameters have been developed, including linear polarization resistance (LPR) [22][23][24][25], potentiodynamic polarization [5][6][26][27][28], electrochemical noise (ECN) [2,4,29], electrochemical impedance spectroscopy (EIS) [30][31][32][33], and harmonic distortion analysis [34][35][36]. However, each of these electrochemical techniques has advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on corrosion kinetic parameter estimation methods for the early stage corrosion of Q345B steel in 3.5wt% NaCl solution

Cai

Wen

Jin

2017

Int J Miner Metall Mater

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Corrosion kinetic parameters play an important role in researchers' ability to understand and predict corrosion behavior. The corrosion kinetic parameters of structural steel Q345B specimens immersed in 3.5wt% NaCl solution for 1-2 h were determined using linear polarization resistance (LPR), Tafel-curve multiparameter fitting, electrochemical impedance spectroscopy (EIS), and electrochemical frequency modulation (EFM) methods. The advantages and disadvantages of each method were investigated and discussed through comparative investigation. Meanwhile, the average corrosion rate was examined using traditional coupon tests. The results showed that the corrosion current density values estimated by EFM at a base frequency of 0.001 Hz and those obtained by Tafel-curve four-parameter fitting (TC4) are similar and consistent with the results of coupon tests. Because of their slight perturbation of the corrosion system, EIS and EFM/TC4 in collaborative application are the recommended techniques for determining the kinetics and the corresponding parameters for the homogeneous corrosion of the naked metal. In our study of the electrochemical kinetics, we obtained much more abundant and accurate electrochemical kinetic parameters through the combined use of different electrochemical methods.

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“…In some studies, the kinetics of the steel dissolution processes have been quantified by plotting the Tafel lines at polarization potentials where the curve does not show a well-defined linearity due to the mass transport control occurs simultaneously [9,10]. Similarly, sometimes a Tafel region is assumed at potentials close to the OCP potential (ΔE˂90mV) which does not meet the minimum criteria to be considered in the activation control zone, because at these potentials the reverse reaction still coexists [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of aeration on Tafelian behavior of the carbon steel corrosion in acid sulfate medium

Sepúlveda

Vásquez

Gutiérrez

2017

Rev. Fac. Ing. Univ. Antioquia

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This study presents a corrosion analysis of carbon steel by electrochemical polarization tests on a rotating disk electrode at several aeration and hydrodynamic conditions in solution 0.2 mol L -1 K 2 SO 4 at pH 3. The reactions involved in the dissolution of the steel are analyzed by studying the Tafel regions of the polarization curves, confirming that the dissolved oxygen plays a predominant role in the corrosion of the metal. The corrosion rate was 35 times higher in natural aeration conditions than in the deaerated medium. Under natural aeration conditions, it is not possible to make a simple analysis of the corrosion of the steel from the extrapolation of the Tafel slopes since such slopes were not well defined due to the formation of rust in the anodic region and the influence of mass transport in the cathodic region. At cathodic polarization potentials and with natural aeration, there is an increase in polarization currents with respect to the deaerated system and the oxygen reduction reaction is controlled by the mass transport. Under deaerated conditions and at intermediate polarization potentials, there is a change in the dissolution mechanism of the steel. At high overpotential, the rate of dissolution of the steel tends to be equal in both systems, aerated and deaerated because the corrosion of the metal is controlled by the diffusion of species through corrosion products film. RESUMEN:Este estudio presenta un análisis de corrosión del acero al carbono mediante pruebas de polarización electroquímica en un electrodo de disco rotatorio en varias condiciones de aireación e hidrodinámicas en solución 0,2 mol L -1 K 2 SO 4 a pH 3. Las reacciones implicadas en la disolución del acero se analizan estudiando Tafel regiones de las curvas de polarización, lo que confirma que el oxígeno disuelto desempeña un papel predominante en la corrosión del metal. La velocidad de corrosión fue 35 veces mayor en condiciones de aireación natural que en el medio desaireado. Bajo condiciones de aireación natural no es posible realizar un análisis simple de la corrosión del acero a partir de la extrapolación de las pendientes de Tafel, ya que tales pendientes no están bien definidas debido a la formación de óxido en la región anódica y a la influencia del transporte de masa en la región catódica. En los potenciales de polarización catódica y con aireación natural, hay un aumento en las corrientes de polarización con respecto al sistema desaireado y la reacción de reducción de oxígeno es controlada por el transporte de masa. Bajo condiciones desaireadas y en potenciales de polarización intermedios, hay un cambio en el mecanismo de disolución del acero. A altos sobrepotenciales, la velocidad de disolución del acero tiende a ser igual en ambos sistemas (aireado y desaireado), porque la corrosión del metal es controlada por la difusión de especies a través de la película de productos de corrosión.

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Electrochemical study of the corrosion rate of carbon steel in soil: Evolution with time and determination of residual corrosion rates under cathodic protection

Cited by 88 publications

References 21 publications

Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

A comparative study on corrosion kinetic parameter estimation methods for the early stage corrosion of Q345B steel in 3.5wt% NaCl solution

Effect of aeration on Tafelian behavior of the carbon steel corrosion in acid sulfate medium

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