... Upstream Oil & Gas strength Production Chemistry Corrosion Management oilfield chemistry H2S management metals & mining Downstream Oil & Gas sour service texas 77084 requirement class 2 low alloy steel steel sa-516 grade 65 manuscript resistance weld metal permission...

... mechanical properties. The microstructure of a material can be altered after a thermal or mechanical treatment resulting in new properties. metals & mining H2S management concentration corrosion test Corrosion Inhibition Upstream Oil & Gas specification weld metal Production Chemistry...

... & mining Corrosion Management chemical composition texas 77084 Production Chemistry type 410 weld metal stainless steel manuscript filler metal Corrosion Inhibition cr stainless steel Houston hardness H2S management type 405 fabrication steel permission restoration weld A Review...

... weld metals are exposed to hydrochloric acid solution, it is often found that weldments undergo severe corrosion compared to the base material. In order to clarify the mechanism of preferential UNS S31600 weldment corrosion, microstructural analysis was performed using SEM, TEM, and EBSD. In addition...

... it is necessary to weld duplex stainless steels. Welding involves a thermal cycle that may alter the phase balance, and so it is necessary to assure that phase balance is still within acceptable ranges in the heat-affected zone and the weld metal. For example, high ferrite content may lead to lower toughness...

... inhibitor. However, uniform inhibitor filming cannot be guaranteed and sensitivity to weld metal composition is possible with some chemicals. Weld metal sensitivity can induce or exacerbate the problem. The work conducted produced conditions where preferential weld corrosion initiated in uninhibited...

... materials and corrosion Downstream Oil & Gas silicon concentration Pipeline Corrosion well integrity concentration weld metal composition Houston hgo circuit carbon steel manuscript corroded weld permission oxygen concentration texas 77084 Sulfidation base metal High Temperature...

... in most cases was identified as intergranular SCC (iGsCC) [1,2], while cracks which occurred in the Alloy 182 weld metal were also observed to be the IGSCC type [3]. Because cracks initiate and propagate along the grain boundaries on the surface, the susceptibility of these materials to PWSCC...

... test levels. The focus of this paper is the welding metallurgy and weld metal properties of N07022 alloy. Evaluation of the N07022 weld metal microstructure will be discussed. Sour gas testing of N07022 weld overlay material will be highlighted, including slow strain rate tensile test results...

... of microstructure observations, no abnormalities were found in the ferrite/austenite balance and no intermetallic phases were observed in the sample, while Charpy impact tests at room temperature revealed quite a low absorbed energy in both, the base metal and the weld metal. These results indicated the occurrence...

... caused the rollers to fail catastrophically. Despite the degradation of the rollers, it was assumed that the rollers were still applying significant proportion of the required load and the test result was still valid. Optical profilometry of the HAZ adjacent to the weld metal showed a series of features...

... volume fraction measurements and Charpy V-Notch testing done at ambient and warm temperatures, creep testing was also performed with both base metal and weld metal using the Omega method that was developed by the Materials Properties Council (MPC1) Despite significant sigma phase embrittlement revealed...

...) investigative result of welds made with each product as well as all weld metal mechanical properties in the “Z” direction for UNS N06055 when welded using the ambient temperature temper bead procedure. Introduction Safe nuclear power production is an absolute necessity in view of the vast concerns...

... Abstract As light water reactor operation continues, there is concern for the effects of thermal aging of structural materials and welds. Cast stainless steels are a particular concern, but stainless steel weld metals are also ‘cast’ and always have ferrite, but may be overlooked. Ferrite...

... in the proper annealed condition. However, due to elemental segregation during weld solidification, there is a wide variation in the local chemical composition of as-solidified weld metal. Components fabricated from Ni-base alloys are typically employed in the as-welded condition and the as-solidified weld...

... ABSTRACT Rapid fracture (or sudden fracture) of various wrought and weld metals in the environment have been observed during compact tension (CT) test in different laboratories. Hydrogen distribution throughout the metal and plastic instability during testing has been proposed as two possible...

... ABSTRACT Localized corrosion of carbon steel welds has been thought to arise primarily from galvanic effects due to compositional differences between the deposited weld metal, the parent steel, and the heat affected zone induced by the welding process. The location and morphology...

... Chlorides, HCl and NH 4 Cl. Subsurface Corrosion Downstream Oil & Gas weld metal flowline corrosion riser corrosion weld materials and corrosion Upstream Oil & Gas Publication Division permission chloride texas 77084 examination REAC Pipeline Corrosion well integrity test...

... ABSTRACT Extensive data have been obtained in the last decade show that Alloy 690 and its weld metals inherently have at least some susceptibility to stress corrosion cracking (SCC). Low growth rates are observed under good circumstances, but there are vulnerabilities that can increase...

... with natural gas, 2% CO 2 and 150 ppm of H 2 S, as well oxidants due to bacterial or biofouling control methods. The study used Tafel polarization and electrochemical noise tests on multi electrode assemblies fabricated from sections of parent metal, heat affected zone (HAZ) and weld metal. This technique...