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Fang, Bin; Atrens, Andrej; Wang, JQ; Han, En‐Hou; Zhang, Zhu; Ke, Wei

doi:10.1023/a:1021126202539

Cited by 170 publications

(34 citation statements)

References 21 publications

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“…They are usually found in aerated, relatively concentrated carbonate/bicarbonate solutions with pH value of 8-11 [4][5][6]. When sufficient cathodic current at pipeline surface is available, the pH value of the solution outside the pipeline can even reach to 11-12 [7]. It has been well accepted that high-pH SCC is primarily attributed to the dissolution-based mechanism, i.e., cracking being facilitated by anodic dissolution and repeated rupture of passive films formed over crack tips under the stress [8].…”

Section: Introductionmentioning

confidence: 99%

A New Understanding of Stress Corrosion Cracking Mechanism of X80 Pipeline Steel at Passive Potential in High-pH Solutions

Fan

Liu

Guo

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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Susceptibilities to stress corrosion cracking (SCC) of X80 pipeline steel in relatively concentrated carbonate/ bicarbonate solutions with different chloride ion concentrations or pH value at a passive potential of -200 mV vs SCE were investigated by slow strain rate tensile test. In order to explore the SCC mechanism and the evaluation criterion for the SCC susceptibility of the steel in passive state, electrochemical measurements were taken. Potentiodynamic polarization curves were obtained at different potential sweep rates, and electrochemical impedance spectroscopy measurements were taken after fast polarization to the passive potential. The effects of chloride ion and pH on SCC behaviors of X80 steel at the passive potential were also discussed. The results showed that the SCC mechanism of X80 pipeline steel was greatly influenced by the passive film formed in these solutions. The SCC behaviors followed the film suppressed anodic dissolution mechanism in these circumstances, because the filming process accounted for a considerable proportion of the overall electrode process. The criteria for evaluating the SCC susceptibility of the steel at passive potential were proposed and validated. Decreasing in the concentration of chloride ion or increasing in pH value resulted in the reduction in SCC susceptibility. The existence of chloride ion greatly lowered the passivation tendency and the film stability, while its concentration determined the dissolution rate of the steel matrix. Higher pH value was responsible for the stable and tenacious passive films and the high repassivation capability. It was also inclined to lower the anodic dissolution rate at crack tips by retarding the cathodic oxygen reduction.

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Section: Introductionmentioning

confidence: 99%

A New Understanding of Stress Corrosion Cracking Mechanism of X80 Pipeline Steel at Passive Potential in High-pH Solutions

Fan

Liu

Guo

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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“…It is acknowledged [1][2][3][4][5][6] that the buried pipelines have experienced two forms of stress corrosion cracking (SCC), i.e., high-pH SCC and near-neutral pH SCC. In particular, the majority of pipeline SCC occurred under high-pH condition that is associated with an aerated, concentrated carbonate-bicarbonate solution [1].…”

Section: Introductionmentioning

confidence: 99%

Corrosion of the stressed pipe steel in carbonate–bicarbonate solution studied by scanning localized electrochemical impedance spectroscopy

Cheng

2008

Electrochimica Acta

105

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“…Not surprisingly, there is abundant literature in the fields of corrosion and scale formation [3,4]. The investigation of how corrosion impacts on scale formation and vice versa has, to date, mainly determined the effect of calcium carbonate scale formation on a carbon steel surface [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Understanding barium sulfate precipitation onto stainless steel

Jones¹,

Jones²,

Pejcic³

et al. 2008

Applied Surface Science

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This paper investigates the influence of barium sulfate scaling and scaling inhibitors on the electrochemical behaviour of stainless steel. The results of a synchrotron radiation grazing incidence X-ray diffraction (SR-GIXRD) and electrochemical impedance spectroscopy (EIS) study on stainless steel shows that different scaling inhibitors interact uniquely with the substrate when barium sulfate is precipitated on the electrode surface. The main effect of the substrate in the presence of inhibitor is a tendency to form smaller barium sulfate particles. The SR-GIXRD patterns obtained in the presence of the two inhibitors were different to each other and to the control, with the carboxylate showing greater amounts of barite solids precipitated together with iron(III) and (II) sulfate, while the phosphonate showed low amounts of barite solid were precipitated. The presence of iron sulfates on the electrode surface as detected by SR-GIXRD, in the case of NTA, suggests that scaling inhibitors are not always benign, and can promote the dissolution of iron species from the substrate. #

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Cited by 170 publications

References 21 publications

A New Understanding of Stress Corrosion Cracking Mechanism of X80 Pipeline Steel at Passive Potential in High-pH Solutions

A New Understanding of Stress Corrosion Cracking Mechanism of X80 Pipeline Steel at Passive Potential in High-pH Solutions

Corrosion of the stressed pipe steel in carbonate–bicarbonate solution studied by scanning localized electrochemical impedance spectroscopy

Understanding barium sulfate precipitation onto stainless steel

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