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Keywords: partial pressure
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Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16626
... Kane iCorrosion LLC 1221 Willard Street Houston, TX 77006 USA ABSTRACT The use of 0.05 psi H2S partial pressure as the threshold determining when sulfide stress cracking (SSC) resistant materials are needed was codified in NACE MR 0175 (1975) nearly a half century ago and has served the industry well...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16868
...16868 Carbon Steel Corrosion on Production Environment, Evaluating The Impact of CO2 Partial Pressure, BSW And Oil Characteristics on Tubular Life Extend Merlin C. E. Bandeira, Rogaciano M. Moreira, Gustavo L. Vaz, Jefferson R. Oliveira, Ilson Felipe S. Assunção and Oscar R. Mattos Palmieri...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16286
... simulating one to one the conditions of a flexible pipe annulus. The results are compared with tests executed at ambient pressure with both a partial pressure approach and with an approach based on H 2 S fugacity. The difference in results are discussed in the context of the potential improvements possible...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13332
... 2 S and CO 2 partial pressures. The susceptibility of CRAs to SCC is believed to be related to the ability to sustain localized corrosion in the environment of interest. 3-4 Work has been done to demonstrate that SCC of CRAs occurs when the corrosion potential of the materials in the environment...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13302
... ) is so slow that the solution remains supersaturated for days to weeks. The results show that it is possible. At temperature lower than 40 °C and CO 2 partial pressure of 10-5 kPa the saturation ratios (SR) of siderite can remain much higher than 1 and maintain a near-neutral pH for several hundred...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12854
... stainless steel partial pressure stress corrosion stability manuscript Electrochemical study of the Austenitic Stainless-Steel Susceptibility to Sulfide Stress Cracking in H2S-Containing Brines Raymundo Case Texas A&M University Materials Science & Engineering National Corrosion and Materials...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12763
... and aggressive process environments. For this purpose, the model calculates the corrosion rates, corrosion potential and repassivation potential as a function of temperature, alkalinity, pH, partial pressure of gases (including H 2 S), and concentrations of various aggressive species. The corrosion rates...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12937
... Abstract This study investigates the contrasting characteristics of corrosion products/scales and corrosion behavior of X65 carbon steel when exposed to 4.9 wt.% NaCl solution compared to a complex brine solution at different CO 2 partial pressures (3.5 to 29.5 bar) at 200°C. The corrosion...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12939
... ABSTRACT The transition from partial pressure to fugacity in the assessment of acid gas activity (concentration) for the design of qualification testing of metals to be used in sour service according to MR0175/ISO 15156 1,2,3 entails a number of important consequences. This transition...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13428
... corrosion partial pressure Upstream Oil & Gas phase diagram carbon steel acid dew point metals & mining riser corrosion HF acid hf partial pressure concentration Publication Division permission dew point condensation Importance of HF Acid Concentration on the Effect of Residual...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13001
... sweet condition autoclave Houston hydrocarbon shear stress Subsurface Corrosion cix Publication Division assessment partial pressure manuscript coupon Development of a Versatile Corrosion Inhibitor for Multiple Oil and Gas Operating Environments Jeremy Moloney Nalco Champion, an Ecolab...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13400
... of key parameters such as H 2 S gas partial pressure, gas fugacity, aqueous chemical activity, species concentrations, and ionic strength. Also, addressed as part of this review are evaluations of recent studies incorporating advanced thermodynamic models at HPHT conditions in assessing EAC...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11472
... ABSTRACT A series of experiments was conducted in a large-scale multi-phase flow loop to investigate the threshold level of H 2 S leading to localized attack on mild steel in CO 2 saturated aqueous solution with 1%wt NaCl at 40°C.The CO 2 partial pressure was fixed at 8.0 bar in all test...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11630
... small. The pressure change along the pipeline was no more than 1%. The liquid holdup was estimated to be very small. A corrosion rate model considering CO 2 partial pressure was used to estimate wall loss. The estimated wall loss from Step 2 fell in the range of measured wall loss after excavation...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11623
... ABSTRACT The corrosion mechanism of X65 carbon steel was evaluated in water environment by increasing CO 2 partial pressure from 1 bar at 24 °C to 110 bar at 40 °C, reaching conditions that include water saturated with supercritical CO 2 . To perform this kind of investigation...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11084
... Steel. And the pitting susceptibility is estimated by the further analysis of polarization curves and surface characterization. The results show that the pitting resistance of S31803 duplex stainless steel decreases with the increase of temperature and the H 2 S partial pressure. S31803 duplex stainless...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10516
... 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 Aerosols C. R...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11268
... and hydrocarbon, hydrocarbon type, hydrocarbon composition, hydrocarbon-to-brine ratio, volume of fluid used, volume of brine-to-coupon surface area ratio, vessel design, vessel piping design, fluid mixing method, shear stress, gas charging temperature, gas charging method, and acid gas partial pressures (pH 2 S...
Proceedings Papers

Paper presented at the CORROSION 2017, March 26–30, 2017
Paper Number: NACE-2017-9126
... with existing corrosion models to calculate corrosion rate. Effect of pH, carbon dioxide partial pressure, temperature, and Reynolds number on ionic species' flux to the pipe surface was investigated. Furthermore, the calculated corrosion rates were compared to the predictions of existing mechanistic models...
Proceedings Papers

Paper presented at the CORROSION 2017, March 26–30, 2017
Paper Number: NACE-2017-9463
... out in both low (1000 ppm) and high (50,000 ppm) chloride solutions, at different H2S partial pressures. Before each test, the rod specimen was mounted in the base of the autoclave, which was then deaerated overnight with oxygen- free nitrogen. The deaerated test solution was then introduced...

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