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Passivity and Pitting Corrosion of X80 Pipeline Steel in

(PDF) Corrosion Behavior of X80 Steel Under Anodic Passivity and Pitting Corrosion of X80 Pipeline Steel in

Corrosion Behavior of X80 Steel Under Anodic Polarization. March 2020; International Journal of Electrochemical Science; DOI 10.20964/2020.03.07(pipe) (PDF) Hydrogen and Chloride Ions Effects on the Automobile Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Experimental evidence indicated that hydrogen can increase the corrosion rates of austenite and ferrite steels [4,11,12] and decrease the pitting resistance of some metals [8,13,14].There were also several interesting studies focused on the effects of pH and chlorine ion on the corrosion behavior of stainless steel (pipe) A New Understanding on AC Corrosion of Pipeline Steel in Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Jan 01, 2017In this work, the corrosion behavior of X80 pipeline steel at various frequencies AC was investigated in carbonate/bicarbonate solution using the polarization curve, EIS test, Mott-Schottky curve and immersion tests. A new understanding on AC corrosion of the steel in alkaline environment is proposed. Decreasing AC frequency negatively shifts the corrosion potential and increases the corrosion Passivity and Pitting Corrosion of X80 Pipeline Steel in

A New Understanding on AC Corrosion of Pipeline Steel in Passivity and Pitting Corrosion of X80 Pipeline Steel in

Nov 04, 2016In this work, the corrosion behavior of X80 pipeline steel at various frequencies AC was investigated in carbonate/bicarbonate solution using the polarization curve, EIS test, Mott-Schottky curve and immersion tests. A new understanding on AC corrosion of the steel in alkaline environment is proposed. Decreasing AC frequency negatively shifts the corrosion potential and increases the corrosion Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Analysis of the Long-Term Corrosion Behavior of X80 Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) The long-term corrosion rate of X80 steel in an acidic red soil was monitored in situ by using a precise electrical resistance (ER) test system. The corrosion characteristics of X80 steel were examined via SEM, EDS, and XRD. The results indicated that the corrosion rate determined from ER test was very similar to that obtained from the mass loss test.(pipe) Author Hongxia Wan, Dongdong g, Yong Cai, Cuiwei DuPublish Year 2020Corrosion Behavior of X80 Steel Under Anodic Polarization(steel) 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.

Author Qiu Li ZhangPublish Year 2020Pitting Corrosion Of Duplex Stainless Steel Pipe KAYSUNS Passivity and Pitting Corrosion of X80 Pipeline Steel in

Oct 28, 2020Pitting corrosion of duplex stainless steel pipe is a form of corrosion that concentrates on a small area on the surface of the pipe and penetrates deep into the metal. The reason is that the electrochemical inhomogeneity of the metal surface forms a small and concentrated anode and large cathode corrosion cell.(pipe) Author Yufa Liu, Yanlin Zhao, Jun YaoPublish Year 2021Corrosion Behavior of X65 and X80 Pipeline Steels under (steel) larger corrosion rate. Under AC interference, X65 steel has a worse corrosion resistance, with a more severe localized corrosion. While X80 steel exhibits a better corrosion resistance, with a slighter corrosion status. The microstructure consisting of ferrite and pearlite is more susceptibility to AC corrosion.(pipe) Cited by 100Publish Year 1994Author X. Mao, X. Liu, R. W. RevieEffect of AC current density on stress corrosion cracking Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Jan 20, 2014An application of AC on the X80 pipeline steel shifts the corrosion potential negatively and degrades the passivity of the steel in high pH concentrated carbonate/bicarbonate solution. A superimposed AC current could accelerate corrosion, with the increase of AC current density, the corrosion rate increases and the corrosion forms evolve from uniform corrosion to pitting corrosion.

Cited by 11Publish Year 2015Author M. Zhu, C.W. Du, X.G. Li, Z.Y. Liu, X.G. WuThe AC corrosion and SCC mechanism of X80 pipeline steel Passivity and Pitting Corrosion of X80 Pipeline Steel in

Dec 01, 2020X80 steel appeared uniform corrosion and the corrosion was slight (Fig. 7(a)). X80 steel generated pits under the effect of full and half-wave AC. The pits had different shapes. There generated many pointed pits under the effect of full wave AC. The pits were produced for anodic dissolution and hydrogen induced anodic dissolution , . When the negative half wave AC was applied, X80 steel generated some pits without corrosion (pipe) Cited by 11Publish Year 2017Author M. Zhu, C. W. DuCorrosion effect of Bacillus cereus on X80 pipeline steel Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Electrochemical impedance spectroscopy showed that B. cereus could accelerate the corrosion of X80 steel. In addition, surface morphology observations indicated that B. cereus could accelerate pitting corrosion in X80 steel. The depth of the largest pits due to B. cereus was approximately 11.23m.(pipe) Cited by 11Publish Year 2017Author M. Zhu, C. W. DuPassivation process of X80 pipeline steel in bicarbonate Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) May 26, 2011The critical passive concentration is 0.009 mol/L HCO 3 for X80 pipeline steel in bicarbonate solutions. No anodic current peak exists in HCO 3/ solutions when the concentration is lower than 0.009 mol/L, whereas there are one and two anodic current peaks when the HCO 3/ concentration ranges from 0.009 to 0.05 mol/L and is higher than 0.1 mol/L, respectively.

Cited by 18Publish Year 2011Author Jian-long Zhou, Xiao-gang Li, Cui-wei Du, Ying Pan, Tao Li, Qian Liu(PDF) Corrosion Mechanisms of Iron and Pipeline Steels in Passivity and Pitting Corrosion of X80 Pipeline Steel in

The Mott-Schottky plots show that the passive film of X80 pipeline steel is an n-type semiconductor, and capacitance measurements are in good accordance with the results of DEIS experiment Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Cited by 1Publish Year 2015Author Shuaixing Wang, Daoxin Liu, Nan Du, Qing Zhao, Jinhua XiaoFormation and Evolution of Oxide/Oxyhydroxide Corrosion Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) In the presence of corrosion product deposit on the pipeline steel surface, pipeline corrosion, especially pitting corrosion, is expected to be enhanced. Stress corrosion cracks could initiate Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Cited by 1Publish Year 2019Author Faysal Fayez Eliyan, Hatem M. AlsyouriEffect of cooling temperature on the microstructure and Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) X80 pipeline steel cooled to 700°C had the best corrosion resistance in the simulated seawater. The decreased amount of the PF phase reduced the area of cathode, resulting in slight corrosion. About 40vol% of the bainite phase provided strength while the PF phase provided adequate ductility to the X80 steel.

Cited by 2Publish Year 2018Author Min Zhu(PDF) Effect of bicarbonate concentration on corrosion of Passivity and Pitting Corrosion of X80 Pipeline Steel in

In this work, the influence of AC on corrosion behavior of X80 pipeline steel was investigated in NS4 nearneutral solution by data acquisition technique, electrochemical test, immersion tests and Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Cited by 2Publish Year 2020Author M. Zhu, J. L. Yang, Y. B. Chen, Y. F. Yuan, S. Y. GuoEffects of Chloride and Carbonate on Corrosion of API-X100 Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Feb 19, 2019Effects of chloride, introduced with 0.03, 0.05, 0.10, 0.12, 0.22, 0.25 M, on the corrosion behavior of API-X100 pipeline steel in 0.15 M carbonate solutions were studied. The evaluations were carried out with monitoring the open-circuit potentials and electrochemical impedance spectroscopy (EIS). The open-circuit potentials gave an electrochemical evidence on the weakening opposite kinetics Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Cited by 31Publish Year 2018Author Hongwei Liu, Hongwei Liu, Tingyue Gu, Guoan Zhang, Hongfang Liu, Y. Frank ChengObservation of the pitting corrosion and uniform corrosion Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Oct 01, 2016However, both pitting morphology and the products of uniform corrosion have been observed at the same time for the corrosion of X80 pipeline steel in NaCl solutions. It has already been reported by Yang et al. that for the corrosion of NiCrMoV high strength steel in NaCl solutions, pitting corrosion may develop into uniform corrosion. Specific corrosion mechanisms have been proposed to explain the corrosion

Cited by 5Publish Year 2019Author Shuaixing Wang, Xiaole Yin, Hao Zhang, Daoxin Liu, Nan DuPassive Films Scientific.Net

Abstract The passive films formed on X80 and X70 pipeline steel in 0.5 molL-1 NaHCO 3 solution are investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), and the corrosion resistance of both steel is compared. The results show that X80 steel has a much lower passive current density than X70 steel.(pipe) Cited by 61Publish Year 2016Author Yafei Wang, Guangxu Cheng, Yun LiEffect of AC on corrosion behavior of X80 pipeline steel Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Abstract. Corrosion behavior of X80 pipeline steel under the application of various waveforms AC was investigated in concentrated carbonate/bicarbonate solution by electrochemical measurements, immersion tests, and slow strain rate tensile tests. Under the application of AC current of various waveforms, the corrosion potential shifts negatively and the passivity of the steel degrades severely.(pipe) Cited by 70Publish Year 2014Author Min Zhu, Cuiwei Du, Xiaogang Li, Zhiyong Liu, Shengrong Wang, Jiankuan Li, Dawei ZhangEffect of AC on corrosion behavior of X80 pipeline steel Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) May 01, 2015Corrosion behavior of X80 pipeline steel under the application of various waveforms AC was investigated in concentrated carbonate/bicarbonate solution by electrochemical measurements, immersion tests, and slow strain rate tensile tests. Under the application of AC current of various waveforms, the corrosion potential shifts negatively and the passivity of the steel degrades severely Passivity and Pitting Corrosion of X80 Pipeline Steel in

Cited by 79Publish Year 1993Author K. Videm, A. M. KorenEffect of a High Concentration of Chloride Ions on the Passivity and Pitting Corrosion of X80 Pipeline Steel in

This is mainly due to the characteristics of X80 steel with its high-strength and high toughness, good weldability, and low ductile-to-brittle transition temperature [3, 4]. However, when pipeline steel is buried underground, the actual service life of pipeline steel is reduced due to the corrosive action of HCO 3-, (pipe) Cited by 7Publish Year 2019Author Yongchang Qing, Yunlong Bai, Jin Xu, Tangqing Wu, Maocheng Yan, Cheng SunB4 - corroSion caSe StudieS and prevention of StainleSS Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) ventilation, 25Cr-14-0.8mo-0.2N steel)3) 2.2 pitting corrosion and stress corrosion cracking of welds in water supply piping Welded joints in hot water supply piping (of Type 304 stainless steel) in Hotel A suffered corrosion as shown in Figure 6. Leakage of hot water through one corroded weld occurred after 1.1 years of use.(pipe) Cited by 7Publish Year 2019Author Yongchang Qing, Yunlong Bai, Jin Xu, Tangqing Wu, Maocheng Yan, Cheng SunWhat is Passivity? - Definition from Corrosionpedia(steel) Sep 24, 2013Passivity refers to a corrosion preventative mechanism whereby an oxidation layer forms a continuous film on a metal's surface that prevents further corrosion. Passivity is the loss of electrochemical reactivity, thereby decreasing the corrosion rate of the metal. Passivation results in a barrier of passive film between the metal and the Passivity and Pitting Corrosion of X80 Pipeline Steel in

Corrosion Behavior of X70 and X80 Pipeline Steels in Passivity and Pitting Corrosion of X80 Pipeline Steel in

When AC density was 0200 A/m2, the corrosion morphology of X80 steel was uniform with the smooth surface, only with some pitting corrosion at 300 A/m2 AC density. Thus, corrosion resistance of X80 steel was better than that of X70 steel in simulated soil solutions. Keywords X70 steel, X80 steel, alternating current, corrosion rate 1 Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Corrosion Behavior of X80 and X70 Pipeline Steels in Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) The corrosion rate of X80 steel is lower than that of X70 steel, and the pitting corrosion degree of X70 steel is more than X80 steel. The corrosion product of X80 and X70 pipeline steels can not protect the substrate, because of its incomplete, loose and incompact, and was consisted of -FeOOH, -FeOOH, -FeOOH, -Fe2O3 and Fe2O3.(pipe) Corrosion and Stress Corrosion Cracking Behavior of X70 Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Apr 01, 2009The electrochemical corrosion and stress corrosion cracking (SCC) behaviors of X70 pipeline steel in CO2-containing solution were studied by electrochemical measurements, slow strain rate tensile tests, and surface characterization. The results found that the electrochemical corrosion of X70 steel in aerated, alkaline solution is an activation-controlled process, and a stable passivity

Corrosion, Passivity, and Pitting of Carbon Steel in Passivity and Pitting Corrosion of X80 Pipeline Steel in

The margin between the free corrosion potential and that of the chloride (Cl ?)-induced pitting normally will be sufficient to prevent this type of attack. A breakdown of this new type of passivity that occurs in the correct range might explain localized corrosion of C steels in sweet wells.(pipe) Effect of Alternating Current and Sulfate-Reducing Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) AC current on SRB inuenced corrosion of X80 pipeline steel were investigated in soil-extract solutions (SES). 2. Materials and Methods 2.1. Coupon Preparation X80 pipeline steel was used, complying with standard API SPEC 5LX80, which has a nominal composition (w/w%) of C 0.070, Mn 1.820, P0.007, S 0.023, Si 0.190, Mo 0.010, Ni 0.170, Cr 0 Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Effect of Alternating Current on Passive Film and Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Jan 02, 2020The relationship between microstructure and alternating current (AC) corrosion behavior of X80 pipeline steel was systematically studied in CO 32 /HCO 3 solution using corrosion tests and surface analysis technology. The results show that AC prevents the formation of passive film and decreases its stability.

Effect of CO Concentration on the Corrosion Behavior of Passivity and Pitting Corrosion of X80 Pipeline Steel in

2on the corrosion behaviour of X80 pipeline steel in a high-pH soil solution. The electrochemical corrosion mechanism of X80 steel in alkaline soil provides a basis for the modification and application of X80 steel. 2. EXPERIMENT In this study, the working electrode material was X80 pipeline steel(pipe) Effect of Elemental Sulfur on the Corrosion Behavior of Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) S, which may make the corrosion process of carbon steel more complicated. The aim of this work is to understand the synergistic effect of multiple impurities such as O 2, CO 2 and NO 2 on the corrosion behavior of X80 pipeline steel in water-saturated SC-CO 2 (pipe) Effect of Impurities on the Corrosion Behavior of CO2 Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) 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

Effects of O2 and SO2 on Water Chemistry Characteristics Passivity and Pitting Corrosion of X80 Pipeline Steel in

Passivity of 13Cr Stainless Steel in 1% NaCl Solution under Dynamic Supercritical CO2 Conditions. Passivity and Pitting Corrosion of X80 Pipeline Steel in Initial corrosion mechanism for API 5L X80 steel in CO2/SO2-saturated aqueous solution within a CCUS system Inhibition effect of SO2 impurity. Passivity and Pitting Corrosion of X80 Pipeline Steel in Understanding the pitting corrosion mechanism of pipeline steel in an impure supercritical CO2 Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Materials Free Full-Text Coupling Effects of pH and Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) In an acidic red soil environment, the corrosion mechanism of X80 steel may be closely related to the pH value and oxygen content, but it has not yet formed a systematic understanding. In this paper, the coupling effects of pH and dissolved oxygen on the corrosion behavior and mechanism of X80 steel in an acidic soil simulated solution were further analyzed by electrochemical methods and three Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Materials Free Full-Text Effect of Alternating Current Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) AC corrosion has been considere d as a threat to the corrosion of buried pipelines. Effects of sulfate-reducing bacteria (SRB) and alternating current (AC) on corrosion of X80 pipeline steel in soil-extract solution were investigated by electrochemical and surface analysis techniques. AC current can inhibit the growth of planktonic and sessile SRB.

Pitting Corrosion of Pipeline Steel in Dilute Bicarbonate Passivity and Pitting Corrosion of X80 Pipeline Steel in

Corrosion behavior of grade 550 (X-80) pipeline steel with coating disbondments was studied in a range of bicarbonate (HCO 3 ) solutions using a potentiodynamic polarization technique.Corrosion morphology of the steel was examined using optical and scanning electron microscopy.(pipe) Pitting corrosion - facts and how to reduce the risk Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Problems with pitting corrosion attacks depend primarily on the chloride content, the pH value (the acidity), and the temperature. If pitting has taken place and if the environment in such is not too corrosive for the steel grade, a spontaneous repair of the passive layer will occur in the presence of oxygen.(pipe) Pitting corrosion behavior of type 904L stainless steel in Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Abstract. Potentiodynamic cyclic anodic polarization, scanning electron microscopy, and energy dispersive x-ray techniques were used to study pitting corrosion behavior of type 904L (UNS N08904) stainless steel in aerated or argon-deaerated 0.6 M sodium bromide solutions at 25 C. Type 904L SS was shown to undergo pitting corrosion even though the steel has a high molybdenum content

Pitting corrosion of pipeline steel in dilute bicarbonate Passivity and Pitting Corrosion of X80 Pipeline Steel in

Corrosion behavior of grade 550 (X-80) pipeline steel with coating disbondments was studied in a range of bicarbonate (HCO[sub 3][sup [minus]]) solutions using a potentiodynamic polarization technique. Corrosion morphology of the steel was examined using optical and scanning electron microscopy.(pipe) Research Article The Pitting Susceptibility Investigation Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) passive lms grown on X pipeline steel than X and X steel, meaning that the passive lm of X steel had a decreasing concentration of oxygen vacancies and a more stable structure. ence, it may be inferred that the passive lm formed on X pipeline steel has a higher protection against pitting corrosion, compared with those passive lms formedon X and X steel.(pipe) Some results are removed in response to a notice of local law requirement. For more information, please see here.

Study on Microbiologically Influenced Corrosion Resistance Passivity and Pitting Corrosion of X80 Pipeline Steel in

May 20, 2020Stainless steels are widely used in various industries due to their desirable combination of mechanical properties and corrosion resistance. However, corrosion of stainless steels was reported seriously on the weld seam areas, and it is not exceptive for microbiologically influenced corrosion (MIC). In the present study, MIC resistance of two austenitic stainless steels (A1, A2 for short) and Passivity and Pitting Corrosion of X80 Pipeline Steel in (pipe) Study on corrosion behavior of X80 steel under stripping Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Jan 09, 2021The corrosion rate of X80 pipeline steel under the peeling coating in the aseptic and SRB-containing soil was measured and calculated by the weightlessness experiment method. The results are expressed in terms of mass change as shown in Fig. 12.(pipe) Synergistic erosioncorrosion behavior of X80 pipeline Passivity and Pitting Corrosion of X80 Pipeline Steel in (steel) Feb 15, 2021The erosion corrosion behavior of X80 pipeline steel was studied by using sand jet. The weight loss, surface morphology and electrochemical performance of X80 pipeline steel under different angles of impact (30°, 45°, 60°, 75°, 90°) were studied at 12 m/s flow rate.

Passivity and Pitting Corrosion of X80 Pipeline Steel in Passivity and Pitting Corrosion of X80 Pipeline Steel in

In this work, the corrosion of an X80 pipeline steel under SRB biofilms, which were formed with different incubation times in a culture medium, was investigated in simulated CO 2-saturated oilfield produced water. Electrochemical measurements including potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), and materials analysis techniques, i.e., scanning

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