Corrosion behaviors of X70 steel under direct current

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(PDF) Analysis of electrochemical noise of X70 steel in Ku Corrosion behaviors of X70 steel under direct current

Materials and Corrosion 2009, 60, No. 7 DOI 10.1002/ma200805139 527 Analysis of electrochemical noise of X70 steel in Kuerle soil by cluster analysis J. Y. Huang, Y. B. Qiu* and X. P. Guo Electrochemical noise (EN) technique was employed to study the corrosion behaviors of the X70 pipeline steel in the Xinjiang Kuerle saline soil (moisture content 1.04%) during the initial corrosion Corrosion behaviors of X70 steel under direct current (PDF) Corrosion Behavior of X80 Pipe Steel under HVDC Corrosion behaviors of X70 steel under direct current Oct 10, 2018Thus, under high potential/current density conditions, the anodic polarization behaviour of X80 steel in Na 2 SO 4 solution and the influence of Cl ions were investigated using reversed Corrosion behaviors of X70 steel under direct current

A Review of the Effect of AC/DC Interference on Corrosion Corrosion behaviors of X70 steel under direct current

Pipelines installed in the energy utility corridor with alternating current (AC) or direct current (DC) sources have attendant problem of induced corrosion. In the past years, AC or DC induced corrosion of metallic pipelines has been a major challenge facing pipeline utilities.Analysis of the corrosion scales formed on API 5L X70 and Corrosion behaviors of X70 steel under direct current Due to the material loss rates resulting from internal corrosion, it becomes necessary to thoroughly characterize the behaviour (for example CO 2 corrosion behaviour at low partial pressure, under supercritical condition) of high strength steels which are used for oil and gas pipelines such as API 5L X65, X70 and X80 [1-8].Anodic Polarization Behavior of X80 Steel in Na2SO4 Corrosion behaviors of X70 steel under direct current X80 steel has great risk of corrosion in high voltage direct current (HVDC) interference cases. In this study, the anodic polarization behavior of X80 steel under high potential and current density in Na2SO4 solution was investigated. The I × R drop was eliminated using current interrupt technique during the potentiodynamic measurement.

Author Huimin Qin, Yanxia Du, Minxu Lu, Xuepeng Sun, Yi ZhangPublish Year 2020Experimental study on the corrosion behavior of X70 steel Corrosion behaviors of X70 steel under direct current

The corrosion behavior of X70 steel in simulated soil environment under asymmetric dynamic direct current (DC) interference was studied by immersion tests.Characterization of corrosion of x70 pipeline steel in Corrosion behaviors of X70 steel under direct current Feb 07, 2015Characterization of corrosion of x70 pipeline steel in thin electrolyte layer 1. Characterization of corrosion of X70 pipeline steel in thin electrolyte layer under disbonded coating by scanning Kelvin probe A.Q. Fu a , X. Tang a,b , Y.F. Cheng a,* a Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, Alberta, Canada T2N 1N4 b College of CiteSeerX Corrosion Behavior of X80 Pipeline Steel under Corrosion behaviors of X70 steel under direct current The results indicate that, the corrosion potential of X80 pipeline steel with and without superimposed DC stray current all shift negatively, and the corrosion rate increases with the enhancement of tensile stress in solution. Moreover, the above laws become increasingly obvious with DC stray current density form 0.5 to 3.5 mA/cm 2.

Cited by 143Publish Year 2009Author G.A. Zhang, Y.F. ChengAnti-Corrosion Methods and Materials Vol. 66 Iss. 3 Corrosion behaviors of X70 steel under direct current

Corrosion behaviors of X70 steel under direct current interference Jun Wang, Zili Li, Gan Cui, JianGuo Liu, Chuanping Kong, Long Wang, Ge Gao, Jian Guo The purpose of this paper is to study the corrosion behaviors of X70 steel under direct current (DC) interference at 0-1,200 A/m 2 in simulated soil solution. pdf (3.6 MB)Cited by 14Publish Year 2018Author Liwei Wang, Lianjun Cheng, Junru Li, Zhifu Zhu, Shuowei Bai, Zhongyu CuiAnti-Corrosion Methods and Materials Vol. 66 Iss. 3 Corrosion behaviors of X70 steel under direct current Corrosion behaviors of X70 steel under direct current interference Jun Wang, Zili Li, Gan Cui, JianGuo Liu, Chuanping Kong, Long Wang, Ge Gao, Jian Guo. The purpose of this paper is to study the corrosion behaviors of X70 steel under direct current (DC) interference at Cited by 18Publish Year 2018Author Q. Liu, Q. Liu, W. Wu, Y. Pan, Z.Y. Liu, X.C. Zhou, X.G. Li, X.G. LiMicro-electrochemical characterization of corrosion of Corrosion behaviors of X70 steel under direct current Aug 01, 2009The local corrosion behavior of welded X70 pipeline steel in near-neutral pH solution was studied by micro-electrochemical measurements, including scanning vibrating electrode and local electrochemical impedance spectroscopy. The microstructure of the welded steel was observed by optical microscopy and scanning electron microscopy.

Cited by 2Publish Year 2019Author Jun Wang, Zili Li, Gan Cui, JianGuo Liu, Chuanping Kong, Long Wang, Ge Gao, Jian GuoExperimental study on the corrosion behavior of X70 steel Corrosion behaviors of X70 steel under direct current

Jul 02, 2020The corrosion behavior of X70 steel in simulated soil environment under asymmetric dynamic direct current (DC) interference was studied by immersion tests. The experimental results showed that the negatively asymmetric dynamic DC interference would induce localized corrosion.Cited by 2Publish Year 2020Author Ke Gong, Ke Gong, Ming Wu, Ming Wu, Guangxin LiuCombined Effect of Alternating Current Interference and Corrosion behaviors of X70 steel under direct current In this work, effect of AC current on the electrochemical, corrosion and SCC behavior of X70 steel in the near-neutral pH environment under cathodic protection is investigated. The shift of CP potential and current by AC interference is measured and analyzed. Localized corrosion behavior including pitting and SCC are discussed. 2.Combined Effect of Alternating Current Interference and Corrosion behaviors of X70 steel under direct current Influence of alternating current (AC) on pitting corrosion and stress corrosion cracking (SCC) behavior of X70 pipeline steel in the near-neutral pH environment under cathodic protection (CP) was investigated. Both corrosion and SCC are inhibited by -0.775 VSCE CP without AC interference.

Combined Effect of Alternating Current Interference and Corrosion behaviors of X70 steel under direct current

Influence of alternating current (AC) on pitting corrosion and stress corrosion cracking (SCC) behavior of X70 pipeline steel in the near-neutral pH environment under cathodic protection (CP) was investigated. Both corrosion and SCC are inhibited by 0.775 VSCE CP without AC interference. With the superimposition of AC current (110 mA/cm2), the direct current (DC) potential shifts Corrosion behaviors of X70 steel under direct current Corrosion Behavior of Alloy 800 in Simulated Crevice Corrosion behaviors of X70 steel under direct current The corrosion behavior of X70 steel in simulated soil environment under asymmetric dynamic direct current (DC) interference was studied by immersion tests. The experimental results showed that the Corrosion behaviors of X70 steel under direct current Corrosion Behavior of X80 Pipeline Steel under Corrosion Behavior of X80 Pipeline Steel under Coupling Effect of Stress and Stray Current Xinhua Wang, Xinghua Tang*, Liwei Wang, Cui Wang, Zhenzhen Guo College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, 100124, China. *E-mail [email protected]

Corrosion Behavior of X80 Pipeline Steel under Coupling Corrosion behaviors of X70 steel under direct current

Download Citation Corrosion Behavior of X80 Pipeline Steel under Coupling Effect of Stress and Stray Current In this work, the coupling effect of stress and stray current on corrosion of X80 Corrosion behaviors of X70 steel under direct current Corrosion Behavior of X80 Steel Under Anodic To investigate the corrosion behavior of X80 steel caused by an anodic current density, electrochemical tests of X80 steel in near-natural NS4 solution under varying anodic current densities, Iac, were performed. The testing combined a three-electrode and direct-current source. Analysis included electrochemical testing and corrosion morphology.Corrosion Behavior of X80 Steel with Coupled Coating Corrosion behaviors of X70 steel under direct current The corrosion potentials, AC/DC currents and corrosion rates of these two specimens were measured and analyzed in detail to provide an accurate explanation for the corrosion behaviors of X80 steel in the presence of coupled coating defects under the influence of AC interference.

Corrosion behavior of X70 steel in sands at different Corrosion behaviors of X70 steel under direct current

For acceleration of the process at different charging times, a direct current (DC) with 6 V voltage was applied. The results show that DC accelerates the corrosion process of X70 steel in sands and that the corrosion rate increases with charging time of the DC.Corrosion behaviors of X70 steel under direct current Corrosion behaviors of X70 steel under direct current May 07, 2019The results showed that E-I polarization curves under 200-1,200 A/m 2 interference were linear; with an increase in the DC density, the corrosion potential of X70 steel shifted positively, solution pH after the weight-loss tests increased and corrosion rate increased linearly.Effect of Flow on the Corrosion Mechanism of Different API Corrosion behaviors of X70 steel under direct current Mar 28, 2004This work presents the electrochemical results obtained during the study of the corrosion of X52, X60, X65 and X70 pipeline steel samples, immersed in a 3%wt NaC1 solution saturated with CO2 at 20°C under static and controlled turbulent flow conditions.

Effect of Impurities on the Corrosion Behavior of CO2 Corrosion behaviors of X70 steel under direct current

The corrosion property of carbon steel was evaluated using an autoclave under CO 2-saturated water phase and water-saturated CO 2 phase with impurities (O 2 and SO 2) at 80 bar CO 2 and 50 °C to simulate the condition of CO 2 transmission pipeline in the carbon capture and storage (CCS) applications. The results showed that the corrosion rate of carbon steel in CO 2-saturated water was Effect of a DC Stray Current on the Corrosion of X80 Corrosion behaviors of X70 steel under direct current The influence of a direct current (DC) stray current on the corrosion and cathodic disbondment of X80 steel coated with a polyethylene (3PE) coating in 3.5% NaCl solution was studied by immersion experiments, electrochemical tests, three-dimensional microscopy, and a surface analysis. The results showed that the potential of the X80 steel sample shifts under the direct current.Effects of DC Stray Current on the Polarization Corrosion behaviors of X70 steel under direct current with an increase in the DC current density under both cathodic and anodic interferences. Relational between Rp and DC current density was calculated. As the anodic interference current density increased, corrosion potential of X70 steel shifted positively. Opposite behavior is observed in the case of cathodic interference.

Effects of alternating current interference on corrosion Corrosion behaviors of X70 steel under direct current

Apr 09, 2015Zhu et al. investigated the stress corrosion cracking (SCC) behavior of X80 pipeline steel under the influence of various AC current densities and found that an AC current density of 30 A/m 2 was a critical value, above which the SCC susceptibility increased. Although carbon steel corrosion caused by AC stray current has been studied by some Corrosion behaviors of X70 steel under direct current Effects of alternating current interference on corrosion Corrosion behaviors of X70 steel under direct current Tafel slope and corrosion current density), and impedance spectroscopy characteristics of the X70 steel using an electrochemical method. Zhu et al. (2014) investigated the stress corrosion cracking (SCC) behavior of X80 pipeline steel under the inuence of various AC current densities and found that an AC current density of 30 A/m2 was aEffects of alternating current interference on corrosion Corrosion behaviors of X70 steel under direct current Tafel slope and corrosion current density), and impedance spectroscopy characteristics of the X70 steel using an electrochemical method. Zhu et al. (2014) investigated the stress corrosion cracking (SCC) behavior of X80 pipeline steel under the inuence of various AC current densities and found that an AC current density of 30 A/m2 was a

New Cathodic Protection Criteria Based on Direct and Corrosion behaviors of X70 steel under direct current

(2018) Combined Effect of Alternating Current Interference and Cathodic Protection on Pitting Corrosion and Stress Corrosion Cracking Behavior of X70 Pipeline Steel in Near-Neutral pH Environment. Materials 11:4, 465.Research on the Corrosion Behavior of X70 Pipeline Steel Corrosion behaviors of X70 steel under direct current Abstract Electrochemical and SCC behaviour of X70 pipeline steel samples were investigated under various AC frequencies to elucidate the mechanistic aspects of the alternating current (AC)-assisted stress corrosion cracking (SCC) of pipeline steels in simulated seawater solutions.Stress corrosion cracking behavior of rusted X100 steel Corrosion behaviors of X70 steel under direct current Apr 01, 2020Therefore, studying the stress corrosion cracking behavior of X100 pipeline steel under the combined action of Cl and HSO 3 is necessary and important. In this paper, slow strain rate tensile testing was performed using an in-house-built wetdry cycle stress corrosion testing device.

Study of Corrosion Behavior of X80 Steel in Clay Soil

under 200 V HVDC interference potential. Fu [11] studied the corrosion regularity of Q235 steel in Hainan soil under DC stray current corrosion. The results showed that the corrosion rate of Q235 was 16.71 mma-1 at -an average current density of 14.2 Am 2, and the corrosion products mainly composed of Fe 3 O 4 and Fe 2 O 3, with a small Corrosion behaviors of X70 steel under direct current Study of Corrosion Behavior of X80 Steel in Clay Soil under 200 V HVDC interference potential. Fu [11] studied the corrosion regularity of Q235 steel in Hainan soil under DC stray current corrosion. The results showed that the corrosion rate of Q235 was 16.71 mma-1 at -an average current density of 14.2 Am 2, and the corrosion products mainly composed of Fe 3 O 4 and Fe 2 O 3, with a small Corrosion behaviors of X70 steel under direct current Study on corrosion behavior of X80 steel under stripping Corrosion behaviors of X70 steel under direct current Jan 09, 2021It can be seen from Fig. 5 and Table 3 that the corrosion current density of X80 steel in the solution containing SRB is about 7 times that of the sterile environment during the same immersion time, which indicates that SRB greatly promotes corrosion. In addition, the results of the experimental group and the control group showed that the Corrosion behaviors of X70 steel under direct current

Study on the corrosion mechanism of the oxide scale on hot Corrosion behaviors of X70 steel under direct current

Purpose The purpose of this paper is to study the corrosion behaviors of X70 steel under direct current (DC) interference at 0-1,200 A/m² in simulated soil solution.Study on the interference between cathodic protection Corrosion behaviors of X70 steel under direct current Purpose Under normal conditions, there are different protection objects inside and outside the gas station, so two sets of independent cathodic protection systems are adopted. At the same time, an insulating flange is applied at the position where trunk pipelines access to the gas station, which realizes electrical isolation of the structures inside and outside the station.

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