Pressure on Metastable Pitting Corrosion of X70

Pressure on Metastable Pitting Corrosion of X70

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Zixuan Yang's research works Ningbo University,Ningbo

Study made by Yang [30] on the hydrostatic pressure effect on metastable pitting corrosion using X70 steel pipe showed through potentiodynamic tests,that hydrostatic pressure has the capacity to The Pitting Susceptibility Investigation of Passive Films The pitting susceptibility of passive films formed on X70,X80,and X100 pipeline steels was investigated by means of electrochemical noise (EN) and Mott-Schottky measurements.The EN results were analyzed according to the shot-noise theory and stochastic theory.Pit initiation process was analyzed quantitatively using the Weibull distribution function.The Pitting Susceptibility Investigation of Passive Films The pitting susceptibility of passive films formed on X70,X80,and X100 pipeline steels was investigated by means of electrochemical noise (EN) and Mott-Schottky measurements.The EN results were analyzed according to the shot-noise theory and stochastic theory.Pit initiation process was analyzed quantitatively using the Weibull distribution function.

Sour corrosion - ScienceDirect

Jan 01,2017 Pressure on Metastable Pitting Corrosion of X70#0183;In SSC tests of X70 and X80 steels with 10%100% H 2 S at ambient pressure ,the presence of 0.5% acetic acid was found to cause pitting corrosion,making the SSC results difficult to interpret.For each pit,it had to be determined whether theSome results are removed in response to a notice of local law requirement.For more information,please see here.Professor Alex A.Volinsky,Ph.D.The Hydrogen-induced Pitting Corrosion Mechanism in Duplex Stainless Steel Studied by Hydrostatic Pressure Effects on the Kinetic Parameters of Hydrogen Vol.255,pp.230-238,2017.A Statistical Study on the Effect of Hydrostatic Pressure on Metastable Pitting Corrosion of X70 Pipeline Steel,Z.Yang,B.Kan,J.Li,L.Qiao,A.A

Previous123456NextEffect of pressure on corrosion behavior of X60,X65,X70

Corrosion experiments were conducted on X60,X65,X70,and X80 carbon steels in water-unsaturated supercritical CO2 with SO2 and O2 in conditions of 50 Pressure on Metastable Pitting Corrosion of X70#176;C and 8-12 MPa.The general corrosion rates increased with water content and ranged from 0.02 mm/year to 0.31 mm/year at 8 MPa and from 0.01 mm/year to 0.94 mm/year at 10 MPa.Pressure on Metastable Pitting Corrosion of X70Alloy pitting corrosion resistance increases with Epit,this means that the X70 pipeline steel corrosion resistance is worsened by hydrostatic pressure.Furthermore,Figure2indicates that the passivity current density slightly increases with hydrostatic pressure.Materials2017,10,1307 4Pitting corrosion evaluation a review - IOPscienceYang Z.,Kan B.,Li J.,Qiao L.,Volinsky A.A.and Su Y.2017 A Statistical Study on the Effect of Hydrostatic Pressure on Metastable Pitting Corrosion of X70 Pipeline Steel Materials 10 1307.Crossref Google Scholar

Pitting corrosion evaluation a review - IOPscience

Yang Z.,Kan B.,Li J.,Qiao L.,Volinsky A.A.and Su Y.2017 A Statistical Study on the Effect of Hydrostatic Pressure on Metastable Pitting Corrosion of X70 Pipeline Steel Materials 10 1307.Crossref Google ScholarPitting Corrosion of 10Ni8CrMoV High-Strength Steel Pitting corrosion of high-strength steel 10Ni8CrMoV under square wave polarization (SWP) in simulated deep-sea environment is investigated and the possible mechanism is proposed.The results show that potential perturbation generates periodic intensification effect on both anodic and cathodic processes by frequently breaking the electrode equilibrium state.Pitting Corrosion of 10Ni8CrMoV High-Strength Steel Pitting corrosion of high-strength steel 10Ni8CrMoV under square wave polarization (SWP) in simulated deep-sea environment is investigated and the possible mechanism is proposed.The results show that potential perturbation generates periodic intensification effect on both anodic and cathodic processes by frequently breaking the electrode equilibrium state.

Microbiologically Influenced Corrosion

Corrosion,and the second involves Alteration of the Protective Metal Oxide Layer.Pitting is the end result of both mechanisms.The rate of corrosion and the depth of attack associated with each of these mechanisms are generally much higher than that seen for general corrosion because of the large cathode to anode ratios that result.Metastable Pitting of Stainless Steel CORROSIONJul 01,1987 Pressure on Metastable Pitting Corrosion of X70#0183;(2017) A Statistical Study on the Effect of Hydrostatic Pressure on Metastable Pitting Corrosion of X70 Pipeline Steel.Materials 10 :11,1307.Online publication date 14-Nov-2017.Materials Free Full-Text Synergistic Effect of Al2O3 The initiation and evolution of the localized corrosion in carbon steel were investigated in a simulated marine environment of Xisha Island in the South China Sea.In the initial stage,localized corrosion occurred in the form of corrosion spot.The localized corrosion morphology and electrochemical information during corrosion process were tracked by field emission scanning electron

Materials Free Full-Text Combined Effect of

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 Low-Cycle Fatigue Properties of the X70 High-Frequency The strength,toughness,corrosion,and fatigue resistance are the main requirements for evaluating the integrity of a pipeline.In this study,the tensile strength,impact toughness,and fatigue properties of the pipe body and weld joint of an X70 high-frequency electric-resistant welded (HFW) pipe were measured and the effects of microstructure and surface defects at weld joint on properties Journal of Chinese Society for Corrosion and protectionThree different low alloy steels 1Cr-0.5Al-0.3Mo,5Cr-0.4Ni-0.3Cu and 10Cr-0.3Ni were designed,then taking steel 20MnSi as a reference,their corrosion behavior was comparatively investigated in simulated marine atmosphere by means of periodic immersion accelerated corrosion test and electrochemical test,as well as XRD,SEM and EDS etcetc

Hydrostatic pressure effects on stress corrosion cracking

Pressure on Metastable Pitting Corrosion of X70#0183;In addition,the pitting impact can be determined by the ratio of pitting corrosion rate to total corrosion rate across the entire sample (Table 1).The highest pittingHow build angle and post-processing impact roughness and Jul 30,2020 Pressure on Metastable Pitting Corrosion of X70#0183;The consensus from these roughness/corrosion studies was larger roughness values lead to a higher frequency of metastable pitting,stemming from more heterogeneous pitHot Deformation and Corrosion Resistance of High-Strength The hot deformation characteristics and the corrosion behavior of a high-strength low-alloy (HSLA) steel were investigated at deformation temperatures ranging from 800 to 1100 Pressure on Metastable Pitting Corrosion of X70#176;C and strain rates ranging from 0.1 to 10 s-1 using an MMS-200 thermal simulation testing machine.Based on the flow curves from the experiment,the effects of temperature and strain rate on the dynamic

Ferdowsi University of Mashhad Third University in Iran

The Contrast between the Pitting Corrosion of 316 SS in NaCl and NaBr Solutions Part I.Evolution of Metastable Pitting and Stable Pitting.Journal of the Electrochemical Society ,166 (2),65-75.Maryam Beyhaghi,Kianifar,A.,Vahdati Khaki,J.,Kashefi Torbati,M.(2019).Effect of pressure on corrosion behavior of X60,X65,X70 Corrosion experiments were conducted on X60,X65,X70,and X80 carbon steels in water-unsaturated supercritical CO2 with SO2 and O2 in conditions of 50 Pressure on Metastable Pitting Corrosion of X70#176;C and 8-12 MPa.The general corrosion rates increased with water content and ranged from 0.02 mm/year to 0.31 mm/year at 8 MPa and from 0.01 mm/year to 0.94 mm/year at 10 MPa.Effect of nitrogen on corrosion behaviour of a novel high Oct 01,2018 Pressure on Metastable Pitting Corrosion of X70#0183;Therefore,it can be concluded that nitrogen alloying could inhibit the metastable pitting and enhance the pitting corrosion resistance of CrCoNiN alloy in high temperature chloride solution.Download Download high-res image (600KB)

Effect of grain size on pitting corrosion of 304L

Abstract The influence of grain size on pitting corrosion of 304L stainless steel in 3.5 wt.% NaCl solution was investigated by electrochemical methods employing the statistical approach.The potentiodynamic results revealed that grain refinement has no effect on the pitting potential.To understand the reason of ineffectiveness of grain size on pitting potential of 304L stainless steel Corrosionpedia - What is Metastable? - Definition from Metastability can be used to describe pitting corrosion.Metastable pits are covered during growth and display a constant current density.Rupture of a pit cover during metastable growth can lead to repassivation of the pit.Corrosion of metallic materials fabricated by selective Jun 11,2019 Pressure on Metastable Pitting Corrosion of X70#0183;Pores can somewhat compromise the pitting corrosion resistance of the matrix,and an immersion test for the SLMed 304L and 316L stainless steels in

Corrosion behavior of metastable AISI 321 austenitic

Aug 20,2019 Pressure on Metastable Pitting Corrosion of X70#0183;The corrosion resistance of AISI 321 stainless steel is therefore,not determined only by the ability to passivate,the presence of secondary stable phases can affect the rate of pitting corrosion Corrosion Behavior of E690 High-Strength Steel in The corrosion behavior and mechanism of E690 high-strength steel in marine environment with different pH values were studied through electrochemical technology and long-term alternating wet-dry cycle experiments combined with SEM and XRD.Results showed that the corrosion current density of E690 high-strength steel gradually increased with decreased pH.Cited by 533Publish Year 1987Author G.S.Frankel,L.Stockert,F.Hunkeler,H.BoehniHydrostatic pressure effects on corrosion behavior of X70 Aug 01,2018 Pressure on Metastable Pitting Corrosion of X70#0183;To verity hydrostatic pressure effects on corrosion initiation and propagation,immersion corrosion tests were conducted in 3.5% NaCl solution at 0.1 MPa,5 MPa and 10 MPa for 0.5 h,respectively.3D profiles of typical corrosion pitting on the X70 steel surface after 0.5 h immersion at different hydrostatic pressure in 3.5% NaCl solution were measured by confocal scanning laser

CORROSION MODELING#151;Conclusion Field inputs

Increasing the partial pressure of CO 2 causes the surface layers to become compact,leading the pitting corrosion rate to decrease with CO 2 partial pressure. Bicarbonate ion.Brian Cherry Paper Series Australasian Corrosion Associationfrom a fundamental viewpoint that chloride induced pitting corrosion of steel reinforcement in concrete can be considered to occur as a sequence of distinct stages:- pit nucleation,metastable pitting and stable pit growth.The mechanisms of pitting corrosion of steel in chloride contaminated concrete will therefore be considered on a stages A Review of the Probabilistic Aspects of Localized Corrosion(2015) Quasi-in-situ ex-polarized TEM observation on dissolution of MnS inclusions and metastable pitting of austenitic stainless steel.Corrosion Science 100 ,

12345NextHydrostatic pressure effects on stress corrosion cracking

Nov 02,2017 Pressure on Metastable Pitting Corrosion of X70#0183;To verify the pitting propagation under stress and to clarify the relation of pitting with the cracks produced,Fig.9 shows the pitting corrosion propagation morphology of X70 steel in a 0.5 mol/L NaHCO 3 +0.1 mol/L NaCl solution after immersion for 1000 h with = 0.9 b.The results indicate that pitting is the origin of the SCC.(PDF) A Statistical Study on the Effect of Hydrostatic Hydrostatic pressure effects on pitting initiation and propagation in X70 steel are investigated by evaluating metastable pitting probability using electrochemical

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