... loading in a H 2 S sour environment. It was found that hydrogen diffusion inside the metal is significantly affected by subsurface hydrogen concentration, stresses (including global and local stress such as notch or crack tip stress) and material plasticity. For example, metal subsurface hydrogen...

... Upstream Oil & Gas corrosion fatigue atmospheric corrosion ozone coating chloride crack tip manuscript Houston corrosion damage chromate fracture surface The Effect of Corrosion Inhibitors on Corrosion Fatigue under Complex Environmental Conditions Sarah E Galyon Dorman SAFE Inc 3290...

... H2S management concentration low alloy steel steel crack tip crack propagation mechanism specimen kissc value fracture toughness texas 77084 Houston hydrogen concentration Publication Division permission manuscript Fracture Toughness Assessment of the Susceptibility for Sulfide...

... 650-200Nmm -3/2 , while at ?K values in the range of about 1100-650Nmm” 3/2 there was no significant effect of ?K. The differences in the observed behavior in the two different ?K ranges may be associated with differences in the strain rate at the crack tip. oilfield chemistry Corrosion...

... on the latter, it is essential to model the conditions for crack propagation in order to discern the levers that enable to avoid propagation or to stop the crack. With this view, a hydrogen stress driven model was built that describes stress field and hydrogen activity at the direct vicinity of a crack tip...

... pipe selection h2s management steel permission well integrity frequency strength low alloy flowline corrosion oilfield chemistry riser corrosion corrosion management experiment crack tip hydrogen diffusion corrosion product ultra-high strength low alloy stress corrosion nahco 3...

... corrosion rh cycle texas 77084 crack velocity sensor h2s management final fracture permission houston fracture sample corrosion management ductile overload crack depth scc relative humidity publication division exposure crack tip manuscript Small Scale Crack Growth Sensor...

... Environmentally Corrosion Inhibition Upstream Oil & Gas Publication Division specimen crack tip crack propagation South Creek Drive sour environment texas 77084 nahco 3 Houston FCGR manuscript Environmentally Assisted Cracking of Ultra Strength Low Alloy Steel in Sour Environments M. Ziomek...

... by irradiation, but not directly related to many other variables. To simulate the effect of irradiation on CGR, finite element method (FEM) analyses on yield strength increased alloys were conducted to estimate the size and shape of plastic zone at the crack tip. Yield strengths of 250, 500, 750 and 1000 MPa...

... hydrogen concentration texas 77084 crack tip concentration hydride reorientation cathodic charging hydride Reorientation three-point-bent beam specimen permission manuscript South Creek Drive hydraulic fracturing electrode hydride reorientation map Publication Division specimen...

... oilfield chemistry Corrosion Management hydrogen concentration Corrosion Inhibition Upstream Oil & Gas concentration Modeling & Simulation H2S management sour environment Production Chemistry frequency plateau fatigue crack growth rate crack tip texas 77084 crack growth...

... embrittlement. For the fracture mechanisms, one can consider the theoretical criteria for crack stability based on linear elastic fracture mechanics. The criteria can be used to infer the material toughness and the toughness gradient at a propagating crack tip. These have implications on the mechanisms...

... morphology of the fractured sample was predominantly intergranular with some transgranular regions. Transmission electron microscope (TEM) samples containing crack tips were prepared by focused ion beam (FIB). The analysis revealed the crack to contain a dual layer oxide (outer magnetite and inner Cr rich...

... hydrogen concentration groundwater permission Houston threshold manuscript crack growth crack tip Corrosion Inhibition H2S management Publication Division pipeline steel crack growth rate South Creek Drive A Phenomenological Model for Environmentally Assisted Cracking of Pipeline Steels...

... Oil & Gas sample 58al Corrosion Inhibition oilfield chemistry H2S management transgranular SCC Pipeline Corrosion riser corrosion Corrosion Management pipeline steel specimen crack tip corrosion product sample 60ar examination flowline corrosion Production Chemistry Midstream Oil...

... Production Chemistry Corrosion Management material property transient approach oilfield chemistry evolution specimen experimental result crack length evolution H2S management hydrogen concentration crack growth DCB specimen fracture criterion crack tip dislocation density 2010 A SIMPLIFIED...

... measured in several waste tanks is between -0.44 to - 0.064 V and the temperature of the waste is generally less than 100°C, the observed cracking was determined to be caused by the nitrate [5]. The acidic crack tip leads to a more anodic open circuit potential and stimulation of the cathodic reactions...

... prediction Upstream Oil & Gas hydrogen concentration steady state model DCB specimen k-threshold value MPa initial hydrogen concentration fracture criterion Corrosion Inhibition dislocation density H2S management resistance Sulfide stress crack tip issc value 2009 Copyright ©2009...

... boundary oxidation was not observed on the crack tip in the water without dissolved hydrogen (DH), but was observed in 15- and 30cc-STP/kg-H2O, therefore, oxidation at the grain boundary might have an effect on the crack growth rate. The results of crack tip observations suggest that grain boundary...

... frequency cavitation crack growth rate growth rate fatigue test crack tip Methanol hydrodynamic pressure closure glycerin Copyright ©2008 by NACE International. Requests for permission to publish this manuscript in any form, in part or in whole must be in writing to NACE International, Copyright...