Effect of stresses on the electrochemical corrosion of steel in aqueous media

Romaniv, O. N.; Heneha, B. Ya.; Huta, O. M.; Vasylechko, V.O.

doi:10.1007/bf02538581

Cited by 6 publications

(4 citation statements)

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“…Similar conclusions have been drawn for pipeline steel in groundwater under elastic and yielding stresses . It was suggested that the mechanical effect plays a stronger role in acid solution …”

Section: Resultssupporting

confidence: 73%

Sour Corrosion of C110 Steel and Its Influence by Galvanic Couple and Stress

Ren¹,

Zeng²,

Lin³

et al. 2012

Ind. Eng. Chem. Res.

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Combinational metals of casing or tubing string have been extensively used in deep sour gas wells because of their corrosion resistance and low costs. C110 carbon steel and G3 alloy connected by a thread joint under different stresses represent a typical application of dissimilar metals in such a case. Around the contact part, complex corrosion can occur, including general, galvanic, and stress corrosion. To evaluate such corrosion, simulation experiments were conducted. Three specimens involving (1) a single piece of C110, (2) a galvanic couple of G3 alloy and C110, and (3) an elastic-and plastic-stressed C110 were separately placed in a high-pressure and high-temperature (HPHT) autoclave containing brine water and dissolved H 2 S, CO 2 , and elemental sulfur. After corrosion at 120 °C and 65 MPa for seven days, the specimens were examined by various methods, including weight loss, potential dynamic polarization, electrochemical impendence spectroscopy (EIS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectrometry (XPS). The experimental results showed that sour corrosion of C110 in the vapor is similar to that in solution. The galvanic effect on C110 corrosion by G3 was not evident based on the measurement of the limited increment of corrosion rate. Slower acceleration for corrosion was also observed for C110 when elastic stress was applied. However, plastic deformation significantly stimulated the corrosion rate of C110. The yield strain was found to change the polarization behavior of the anode and the performance of the corrosion scale. The corrosion mechanism is discussed in detail based on an analysis of the surface morphology, composition, and electrochemical performance of the scale, together with theories of the supercritical state, semiconductors, and mechano-electrochemistry.

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Section: Resultssupporting

confidence: 73%

Sour Corrosion of C110 Steel and Its Influence by Galvanic Couple and Stress

Ren¹,

Zeng²,

Lin³

et al. 2012

Ind. Eng. Chem. Res.

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“…Secondly, whilst recognising that the stress waveform is a factor that may influence the fatigue crack growth rate in the presence of a corrosive environment [68,69], in the current study, no cracks are formed from the pit and therefore the model deals only up to the pit-crack transition. Secondly, a previous study reported that no significant differences in corrosion rates were observed at stress levels below the yield stress when the maximum stress in the cyclic load was similar to the tensile stress [70]. In the current model, the applied stress (200 MPa) is below the yield strength of the material.…”

Section: Finite Element Analysis Of Pit Geometrymentioning

confidence: 65%

Simulation of stress-assisted localised corrosion using a cellular automaton finite element approach

et al. 2018

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Highlights  Stress-assisted localised corrosion is simulated using cellular automata finite element approach.  Localised corrosion component of the damage is modelled using cellular automata.  Stress concentration effect of pit geometry is analysed using finite element method.  A feedback loop between the cellular automaton and finite element models allows simulation of stress-assisted localised corrosion.  Comparison of simulation results with experimental measurements show good agreement.

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“…Furthermore, stress-strain-assisted corrosion is one of the fundamental reasons for pipeline failure. Studies have suggested that the impact of plastic deformation on corrosion is much more significant than elastic deformation is [19][20][21][22]. Behera et al [23] observed decreased corrosion resistance on steel bars subjected to pre-induced plastic strain through experiments.…”

Section: Introductionmentioning

confidence: 99%

Effect of DC Currents and Strain on Corrosion of X80 Steel in a Near-Neutral Environment

Zhao

et al. 2021

Metals

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The corrosion behavior of X80 steel in a near-neutral soil-simulated solution under various DC stray currents and applied strains was investigated using electrochemical measurements (open circuit potential, linear polarization, and electrochemical impedance spectroscopy) and surface analysis techniques. Our results show that a DC stray current has a substantially greater effect on steel corrosion compared to applied strain. However, strain could slow down the corrosion rate in specific conditions by affecting the composition of corrosion products and the structure of the corrosion scale on the surface of the steel. Although the porosity of the corrosion scale of steel without an applied strain will increase with increasing DC currents, once strain is applied, the corrosion scale will become denser. Furthermore, both DC currents and strain can promote steel pitting, and the number and size of pitting holes will increase significantly with an increase in current densities.

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Effect of stresses on the electrochemical corrosion of steel in aqueous media

Cited by 6 publications

References 0 publications

Sour Corrosion of C110 Steel and Its Influence by Galvanic Couple and Stress

Sour Corrosion of C110 Steel and Its Influence by Galvanic Couple and Stress

Simulation of stress-assisted localised corrosion using a cellular automaton finite element approach

Effect of DC Currents and Strain on Corrosion of X80 Steel in a Near-Neutral Environment

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