Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L− 1NaHCO3+0.25 mol L− 1Na2CO3solution

Cui, Zhongyu; Wang, L. W.; Liu, Z. Y.; Du, Cuiwei; Li, X. G.

doi:10.1179/1743278215y.0000000018

Cited by 6 publications

(3 citation statements)

References 18 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Possible advantages of this aqueous cell include easier control of testing conditions, in particular environmental uniformity, and avoiding practical difficulties associated with the installation, observation and maintenance of conventional two or three electrode sand or sand cells. This type of aqueous cells has been used in the past to investigate corrosion under various environmental and CP conditions; for instance, it has been used to mimic corrosion in sea water under the effects of stray currents, 28 for studying the influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH solutions 29 and for investigating the effects of alternating current interference on coating disbondment on X65 pipeline steel. 30 Simulating buried steel corrosion conditions in aqueous media is a new endeavour.…”

Section: Design Of New Electrochemical Testing Cellsmentioning

confidence: 99%

Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells

Ying

Tan

Forsyth

2016

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

Excursion from safe cathodic protection (CP) potentials occurs on buried steel pipelines due to various forms of electrical interferences such as stray currents. Variations in pH can also occur over some pipeline sections such as seashore and river crossing pipes. Currently, the exact effects of potential excursion and the pH on CP efficiency have not been sufficiently quantified preliminary due to difficulties in measuring these effects. In this work, these effects have been investigated using electrochemical cells designed to mimic the high resistivity and pH conditions observable over underground steel pipes, including a new electrochemical cell that has been designed to facilitate the effective simulation and control of pH, potential excursion and other CP testing parameters. The pH has been shown to be a key factor affecting the patterns of corrosion and CP efficiency. Localised corrosion has been found to be the dominating form of corrosion under potential excursions conditions.

show abstract

Section: Design Of New Electrochemical Testing Cellsmentioning

confidence: 99%

Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells

Ying

Tan

Forsyth

2016

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

show abstract

“…This has been verified through the detection of potential signal in practical pipeline systems nearby the electric power supply stations. [9][10][11] Furthermore, square and triangular wave AV sources were also applied in pulse electroplating industries, 12,13 which probably leads to the leakage of the square or triangular wave AV signal into the associated equipment in corresponding environments. Correspondingly, the alternating currents were yielded on basis of the different waveform AV signals and flowed across the metal/solution interface.…”

mentioning

confidence: 99%

Distinction in Corrosion Behaviors of Duplex Stainless Steel 2205 Induced by Different Waveform Alternating Voltages Interference

Dai

Jun

Sun

et al. 2019

J. Electrochem. Soc.

View full text Add to dashboard Cite

Anisotropic corrosion behaviors of duplex stainless steel induced by different waveform alternating voltage (AV) interferences have never been elucidated. The results of FeCl 3 pitting immersion tests reveal that the critical pitting temperature (CPT) of 2205 samples is decreased with the interferences of three waveform AV signals. For the AV with equal root mean square (RMS) value on electrode samples, the triangular wave induces much stronger etching on DSS 2205 than the sinusoidal and square ones. However, the sinusoidal and triangular AV interferences trigger the most severe pitting corrosion in high-temperature solution (>50°C). The weight loss induced by pitting corrosion is greater than that by strong etching on samples. Regarding the etching behavior, the austenite in the duplex phase exhibits an inferior corrosion resistance and is preferentially dissolved.

show abstract

“…The final theme contained in the special issue is AC corrosion of pipelines, where two papers are included. Cui et al 19 investigated the effect of AC voltage on passivity of steel developed in concentrated carbonate/bicarbonate solutions, while the work of Lu et al 20 touches the mitigation of AC corrosion of pipelines. Their results are interesting in that the zinc ribbons used for AC corrosion prevention experience accelerated corrosion by AC, especially when the DC (direct current) decoupler is not applied.…”

mentioning

confidence: 99%

Pipeline corrosion

Cheng¹

2015

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

Corrosion, including corrosion assisted cracking, has been identified as the primary mechanism resulting in failures of oil/gas pipelines. 1,2 Pipeline corrosion is a quite complex phenomenon, and the complexity arises as a result of the interaction of multiple reactions and processes occurring simultaneously, which in turn, are very specific to both the material and the environmental interaction. Particularly, the environments where the pipelines are encountered range from highly corrosive ones in upstream oil/gas gathering lines, where high contents of gases such as CO 2 and H 2 S are dissolved in multi-phased flow fluids, to mildly corrosive ones at the soil side, where coating properties and performance, cathodic protection (CP), soil properties, microbial activity, etc., affect the corrosivity of the environment. While significant efforts and advances have been made in pipeline corrosion research, there are increasing uncertainties and ignorance to the emerging corrosion phenomena. In recent years, some broadly reported pipeline incidents resulted from corrosion. 3,4 Indeed, corrosion has been a vital issue affecting the pipeline safety, energy transportation, environmental conservation, and even the national policymaking, as seen in the widely watched Keystone XL and Northern Gateway pipeline projects in North America. 5,6 This special issue of Corrosion Engineering, Science and Technology features papers on the topic of pipeline corrosion. The specific focus is to establish a forum for the dissemination and discussion of recent research advances in the pipeline corrosion area with wide-range themes, including internal corrosion, external corrosion, stress corrosion cracking (SCC), coatings and CP, inspection techniques, corrosion modeling, and AC (alternating current) corrosion. The papers included in this issue are from reputed research groups in Australia, Canada, China, Italy and the USA, respectively.The issue starts with a paper by Eckert, 7 who reviewed the nature, affecting factors, monitoring and management of internal microbiologically influenced corrosion (MIC), one of the least understood corrosion phenomena in oil/gas pipeline systems. Eckert analysed the current method on enumeration of planktonic for MIC investigation, and concluded that the method is neither representative of sessile microorganisms in biofilms nor indicative of the potential for internal MIC in oil and gas systems. Increased emphasis on understanding the interaction between biofilm and metal is suggested in order to improve current MIC management capabilities for oil and gas assets. It is anticipated that the paper provides essential guides for pipeline MIC research and management. Continuing the theme of internal corrosion, Huang et al. 8 have looked to corrosion of pipeline steel in H 2 S/CO 2 containing environments. Undoubtedly, this is also a difficult research topic, especially at a testing pressure up to 10 MPa with the co-existence of H 2 S and CO 2 in the system. They characterised the competitive formation of carbo...

show abstract

Influence of alternating voltages on passivation and corrosion properties of X80 pipeline steel in high pH 0.5 mol L^− 1NaHCO₃+0.25 mol L^− 1Na₂CO₃solution

Cited by 6 publications

References 18 publications

Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells

Investigating effects of potential excursions and pH variations on cathodic protection using new electrochemical testing cells

Distinction in Corrosion Behaviors of Duplex Stainless Steel 2205 Induced by Different Waveform Alternating Voltages Interference

Pipeline corrosion

Contact Info

Product

Resources

About