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Keywords: precipitate
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Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16594
... Mn loss (spinel and Cr 2 O 3 oxidation and volatilization) or Al loss (oxidation) and the dissolution of strengthening precipitates, were found to be a function of the nature of the formed oxide (Fe or Ni-rich spinel, Cr 2 O 3 , Al 2 O 3 ). Alloys N06230 and alumina-forming austenitic (AFA) steels...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13421
... ABSTRACT Nickel alloy UNS N10276 is nominally a single-phase, corrosion-resistant alloy used in a wide variety of applications, particularly in the chemical process industries. Rich in alloying elements like Mo and Cr that promote corrosion resistance, the grain boundary precipitation of mu...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13455
... Production Chemistry precipitation ssr result specimen oilfield chemistry Corrosion Management Publication Division precipitate lab 1 acceptable microstructure Corrosion Inhibition H2S management resistance test method alloy Upstream Oil & Gas elongation cp 10 manuscript...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13558
... government oxide scale spallation oxidation Publication Division precipitate permission build direction spallation rate mass change oxidation rate specimen Houston Microstructure Upstream Oil & Gas EBM oxidation behavior alloy manuscript coupon This manuscript has been authored by...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13475
... calcium carbonate remains in liquid phase. Then, calcite precipitates on the well surfaces. During the first 5 years of operation, the wells had to be worked over by a drilling rig at 6 to 8 months interval. The first few wells were completed with a 9 5/8” casing and 7” slotted liner. Wells from no. 7...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13161
... results are compared with tests undertaken by other authors under various hydrogen-charging conditions. INTRODUCTION The microstructure of all precipitation-hardenable (PH) nickel alloys is based upon an austenitic (?) matrix solid-solution strengthened by elements like Cr, Fe and Nb. Some of these...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13233
... Production Chemistry chemical composition precipitate Houston Corrosion Inhibition H2S management secondary phase duplex stainless steel Upstream Oil & Gas Publication Division permission manuscript oilfield chemistry Corrosion Management isothermally corrosion resistance...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13365
... ABSTRACT Within the framework of a Joint Industrial Project sponsored by several petroleum companies, the behavior of several Precipitation Hardened (PH) Ni-based alloys with respect to Hydrogen Induced Stress Cracking (HISC) resistance was studied, using the Slow Strain Rate Tensile (SSRT...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12863
..., which is based on Mg 2+ or Al 3+ chelation by the anionic phosphonate additives. INTRODUCTION Metal silicates form in process waters with high silica and polyvalent metal ion content. 1,2 Such precipitates/deposits are common in geothermal installations. Iron and magnesium silicates exhibit low...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13025
... ABSTRACT The precipitation-hardenable Nickel Alloy UNS (1) N07718 is one of the most commonly applied alloy in the oil and gas industry. Enriched with amounts of niobium, molybdenum, titanium and aluminum, this alloy is known as having good corrosion resistance in sour gas applications while...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13057
... ABSTRACT Slow strain rate test and rising displacement fracture toughness test were performed to evaluate hydrogen embrittlement of three heats of precipitation hardened UNS N07718 nickel alloys in 3.5wt% NaCl, under cathodic polarization at low temperature 4.4°C (40°F). The susceptibility to...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11155
... materials and corrosion Upstream Oil & Gas Pipeline Corrosion well integrity resistance Subsurface Corrosion alloy 1 Publication Division permission flowline corrosion riser corrosion concentration precipitate specimen texas 77084 alloy alloy 3 manuscript Microstructure...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10876
... qualification), and we test this to destruction. We know phase balance to be important, as this influences both strength and toughness. We also know that these steels are susceptible to the precipitation of IMP if they are inadvertently cooled too slowly or held for too long in the temperature range where IMP...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10883
... & mining riser corrosion Cavitation Corrosion Behavior Publication Division precipitate flowline corrosion Subsurface Corrosion microcrack Ultrasonically tarish cavitation permission materials and corrosion Upstream Oil & Gas texas 77084 specimen alloy seawater grain boundary attack...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11105
... ABSTRACT Although extensively used in oil and gas production due to their excellent combination of mechanical properties and corrosion resistance, 25Cr super duplex stainless steels (SDSSs) are susceptible to the precipitation of deleterious phases during heat treatment and welding...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11243
... tests to assess the degree of grain boundary precipitation in these alloys. When nickel alloys and stainless steels exhibit grain boundary precipitation that is deleterious to intergranular corrosion resistance, they are referred to as ‘sensitized’. Figure 1 shows a sensitized microstructure, where the...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10512
... ABSTRACT Duplex Stainless Steels (DSS) are characterized by a dual-phase ferritic-austenitic microstructure and exhibit high corrosion resistance and excellent mechanical properties. However, formation of different types of intermetallic phases and precipitated compounds may occur during...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10546
... polyacrylate, are evaluated in the absence and presence of the EOR chemicals. The inhibition efficiency is determined using a modified static bottle procedure and the dynamic tube blocking method. In addition, scale precipitates are characterized with scanning electron microscope and X-ray diffraction...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10516
... evaporation precipitate seawater sea-salt aerosol conductivity reaction well integrity Brine Publication Division permission manuscript Subsurface Corrosion deliquescence Thickness composition partial pressure brine composition Properties of Brines formed by Deliquescence of Sea-Salt...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10815
... ductility. Detailed microstructural studies revealed the hardening and low ductility was caused by the precipitation of ultrafine a -Cr precipitates during service. In addition, the austenite phase had also undergone an ordering reaction resulting in the formation of Ni 2 Cr domains. It was concluded that...

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