...Abstract Hydrogen Induced Cracking (HIC) and Sulfide Stress Cracking (SSC) are major issues of line pipes exposed to sour environment. Severity of sour environment determined in accordance with EFC 16 and NACE MR0175 / ISO15156 for low-alloy steels has been proposed based on experimental SSC...

... toughness and hardenability and does not promote the formation of carbides that could retain hydrogen into the steels. In this work, a set of five steels with different nickel content was specially fabricated to study the effect of that element on the sulfide stress cracking (SSC) resistance. Quenching...

...Table 3 Summary of Fracture Toughness testing results Material Specimen ID Temperature, °F (°C) Nitrogen, psig (MPa) Hydrogen, psig (MPa) K-rate J_0.2mm, N/mm (lb/in) J_maxload, N/mm (lb/in) A_J, N/mm (lb/in) β K_jc, Nmm^-3/2 (ksi...

...Abstract Hydrogen induced cracking (HIC) tests of flexible pipe pressure and tensile armor wires were carried out in a H₂S-containing environment in order to assess the resistance to cracking. Tests were carried out in substitute ocean water solution, constantly bubbled with 1...

... of byproduct hydrogen, raising additional concern for hydrogen damage to a stressed component if not properly inhibited. Continued lab acid testing of UNS R56404 ⁽¹⁾ and UNS R56407 titanium coupons confirms that substantial hydrogen uptake and microstructure-dependent penetration can occur during...

... parameter required to maintain control parameters which promote passivation and clean heat transfer surfaces. Hydrogen analysis has also been shown to detect FAC (Flow Assisted Corrosion) and UDC (Under Deposit Corrosion) subsequently monitor corrective procedures. Hydrogen analysis remains the only dynamic...

... measurement, fluid injection and removal via septum, gas entry and gas exit. The enclosure’s leak integrity was confirmed by a pressure decay of less than 0.1% per minute at 1 bar overpressure. Three hydrogen collection probes were attached at 12, 4, and 8 o’clock positions, with a fourth air...

...Hydrogen segregation during the steel production and manufacturing process as being the only cause of the current cracks is also put to discussion by e.g. Boonen et al. ^{11 , 12} The so-called ‘Safety Case Report’ for Doel 3 states that the concentration of hydrogen decreases from 1.5...

...% was quenched and tempered. The modified steels were analyzed with respect to martensite substructure (such as block size), precipitation of carbide, dislocation density, and hydrogen absorption behavior. The sizes of martensite blocks were refined (became smaller) by increasing carbon content. This increased...

... life and improved safety/integrity of pump, valve and tubular assets.¹ Metallic coatings nanolaminate nickel autoclave pump valve tubular corrosion sour service chloride resistance mechanical properties hydrogen abrasion INTRODUCTION In order to characterize the adhesion quality...

... corrosion galvanic coating mechanical properties hydrogen abrasion EXPERIMENTAL METHODS AND RESULTS Accelerated Corrosion Tests Accelerated corrosion testing provides significant performance data when designing and selecting coatings for fastener applications. Although some questions surround...

... of NaClO, CaCl₂ and NaHCO₃. Because OH⁻ and H₂ are generated as products of Mg corrosion reaction, the higher corrosion rate results in the higher change of solution pH and hydrogen evolution rate. Thus, solution pH and hydrogen evolution rate increases...

... behavior. The electrochemical measurements were performed on samples, which were charged with hydrogen for 24 hours before the actual experiment. It is assumed that dissolved hydrogen, as is the case with austenitic stainless steel UNS S30400 and UNS S31000, negatively effects the passivation of nickel...

... was limited to cladding thickness. POSSIBE DEGRADATION MECHANISMS RESPONSIBLE FOR THE LEAK Advanced NDE techniques and in-situ metallography were used for assessment of the vessel for possible hydrogen damage, sensitization and general corrosion. The following were considered to be possible causes...

..., it is considered that the SSC temperature limits for these grades (110 ksi non sour) should be treated carefully and not applied to any H₂S partial pressure conditions. Mechanisms of cracking susceptibility were discussed from the viewpoints of corrosion reaction, hydrogen absorption...

... materials used for geothermal power plants, but also certain gasses such as hydrogen (H₂) or hydrogen sulfide (H₂S) provoke or accelerate corrosion. ² Several corrosion types are known from geothermal power plants. Among them pitting corrosion, induced by high chloride...

... of the most important issues for plant aging problem of nuclear power plant. ^{( 3 )( 4 )} According to these studies, many data have been collected on SCC crack propagation rate, however many unsolved matter have been remained about PWSCC mechanism, though several hypothesis such as hydrogen induced...

... solution (NS4) that are typical of the environment for SCC under cathodic charging, and also evaluating the SSRT at open-circuit potentials. The influential factors for SCC were then discussed based on the levels of applied stress and hydrogen ingress into the steel. Abstract In this study...

...Permeation experiments were performed using a Devanathan-Stachurski assembly ^{21 , 22 , 23} . Exposed area was 3 cm² and unidirectional diffusion was ensured taking a charging surface radius to thickness ratio higher than 20 ²⁴ . To prevent oxidation at hydrogen...

... partial pressure and pH conditions. The SSC resistance limits are discussed in the relationship between H₂S partial pressure and pH. sulfide stress cracking low alloy steel OCTG hydrogen sulfide hydrogen INTRODUCTION 125 ksi grade high strength low alloy steel OCTG has been developed...