.... Hydrogen Embrittlement Ni-alloy 625 UNS N06625 Environmentally Assisted Cracking Hydrogen induced stress cracking INTRODUCTION Nickel alloys are known to have good corrosion properties; in combination with high strength, this makes these materials highly attractive for use in subsea conditions...

... (to assist placement of strain gages) and removed prior to testing by light surface sanding became visible after chemical cleaning on some specimens; however, there were no cracks emanating from these marks. environmentally assisted cracking EAC stainless steel oil sands thermal operations stress...

... triplicate welded ANSI/NACE TM0177-2016 Method A tensile specimens or triplicate welded NACE TM0316-2016-compliant four-point-bend-beam (FPBB) specimens per heat exposed to a sour environment at 90 °C. All environmentally assisted cracking (EAC) specimens were stressed to an equivalent of 90...

... of their nickel content. For instance, Snape ¹¹ improved the strength and SSC resistance of AISI 4340 (a LAS with Ni >1%wt) by tailoring the final steel microstructure. High-strength low alloy steel hydrogen embrittlement hydrogen stress cracking environmentally assisted cracking oil and gas...

... and drying at 60 °C. Abstract A test method is in development to assess aerospace coatings and their capacity to protect structures from environmental assisted cracking (EAC) initiation and propagation in corrosive atmospheres. EAC initiation and propagation is influenced by the complex interactions of load...

... in the drilling fluid, or by pickup from the geological formation. Considering the increase of temperature with well depth, corrosion resistance becomes a crucial property for operational reliability and integrity of drilling equipment. Pitting and environmentally assisted cracking (EAC) become a major concern...

... potential (-0.7 V_sce,) at 50 °C, indicating the HER and the related HE of the steel may not occur. However, If the conversion coating degraded and lost corrosion protective property, the OCP could drop below the HER potential and possibly induce HE. Environmentally assisted cracking hydrogen...

... to electron backscatter diffraction (EBSD). High-strength low alloy steel hydrogen embrittlement hydrogen stress cracking environmentally assisted cracking oil and gas subsea slow strain rate testing cathodic protection INTRODUCTION Oil and Gas environments A large amount of recoverable Oil and Gas...

... for the purpose of analytical TEM characterization. Initial imaging of the notch of Alloy 800 tensile specimens revealed a combination of environmentally-assisted cracking (EAC), intergranular corrosion (IGC), and pitting corrosion occurring up to approximately 50 μm in depth. Energy dispersive x-ray spectroscopy...

.... The brittle nature of the fracture surface, calcareous deposits on the ferrule and exposure to cathodic protection suggested hydrogen induced stress cracking—a form of environmentally assisted cracking—as a plausible failure mechanism. Thus, the three causative factors promoting hydrogen induced stress...

... usability in non-drilling oilfields applications. Additionally, some of these alloys having higher pitting and crevice corrosion resistance were tested for environmentally assisted cracking in mild sour brine in 1psia (6.9KPa) H₂S, 13.5 psia (93KPa) CO₂, pH 4.0). Through various...

...Abstract Environmentally assisted cracking of high strength nickel based alloys under was investigated in 3.5wt% NaCI under cathodic polarization. Rising displacement tests were performed on C22HS and MP98T were performed at a slow K-rate of 0.005Nmm^-3/2/s. The results suggest...

... on the specimens. Increasing the chloride concentration was linked to higher corrosion rates in the specimens due to its scale destabilizing effects. Environmentally Assisted Cracking EAC stainless steel oil sands thermal operations stress corrosion cracking SCC INTRODUCTION While carbon steel (CS...

... of production. The failure was attributed to environmental assisted cracking (AEC) initiating at the thread root on the O.D. (annulus side) of the tubing. The cracked microstructure was similar to that shown in Figure 6 . Additional information on the well completion and results of the failure investigation...

... welded joints in deaerators and steam drums in some Italian power plants. The damage was associated to a sort of Environmental Assisted Cracking (EAC) related to static and/or slow rate dynamic stresses and corrosive potential of water (mainly dissolved oxygen and pH). The feedback of the failure...

... from the circumferential weld on the shell-side after a short time of service in the heat exchangers.. The failure has been preliminary diagnosed as Environmentally Assisted Cracking (EAC), which is general term for brittle mechanical failures that result from a combination between residual tensile...

... spectroscopy (SEM/EDS). Chemical analysis to detect the presence of trace quantities of ammonium was carried out on some corrosion products. Abstract Environmentally Assisted Cracking (EAC) of copper tubes in high rise residential HVAC systems is an under-recognized problem. The authors have worked on three...

... Cracking (SCC). The intent of this paper is first to delimit domains of susceptibility corresponding to these two different forms of Environmentally Assisted Cracking (EAC) and second to discuss the parameters affecting the transition from SSC to SCC. Duplex stainless steel UNS S32304 stress corrosion...

.... Some of the cracks had grown through the thickness and started to leak. The failure has been diagnosed as Environmentally Assisted Cracking (EAC), which is a general term for brittle mechanical failures that result from a combination between residual tensile stress, susceptible microstructure...

... steel tubulars for the completion of high-temperature, high-pressure (HTHP) wells. These alloys have demonstrated corrosion resistance in HTHP well conditions but are susceptible to environmentally assisted cracking (EAC) due to the interplay of depassivation by chlorides and hydrogen uptake enhanced...