Browsing NTNU Open by Author "Torres Rodriguez, Cristian"
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Crevice corrosion of solution annealed 25Cr duplex stainless steels: Effect of W on critical temperatures
Torres Rodriguez, Cristian; Johnsen, Roy; Iannuzzi, Mariano (Peer reviewed; Journal article, 2021)In this work, the influence of tungsten on the crevice corrosion resistance of three super duplex stainless steels (SDSS) containing 0.0, 0.6, and 2.1 wt.% W was determined. The PD-GS-PD technique was used to estimate the ... -
Effect of tungsten on the precipitation kinetics and localized corrosion resistance of super duplex stainless steels
Bernås, Mia; Westermann, Ida; Johnsen, Roy; Torres Rodriguez, Cristian; Jernberg, Anders; Qvale, Atle H; Iannuzzi, Manuela (Journal article; Peer reviewed, 2018)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 ... -
Influence of tungsten on passivity breakdown and repassivation of 25CR super duplex stainless steel
Torres Rodriguez, Cristian; Kappes, Mariano A; Johnsen, Roy; Iannuzzi, Mariano (Journal article; Peer reviewed, 2018)Super duplex stainless steels are ferritic-austenitic stainless steels with 25 wt% Cr and a pitting resistance equivalent (PRE) ≥ 40. Even though other elements, such as Cr and Mo, have been studied in much more detail ... -
Properties of TSA in natural seawater at ambient and elevated temperature
Wilson, Håvard; Johnsen, Roy; Torres Rodriguez, Cristian; Hesjevik, Sven Morten (Journal article; Peer reviewed, 2019)Electrochemical properties of thermal sprayed aluminium (TSA) coating were investigated in natural seawater at elevated temperatures with and without cathodic protection (CP). TSA has a low current density requirement when ... -
The Role of Tungsten on the Phase Transformation Kinetics and its Correlation with the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels
Torres Rodriguez, Cristian; Hazarabedian, Maria Sofia; Quadir, Zakaria; Johnsen, Roy; Iannuzzi, Mariano (Peer reviewed; Journal article, 2020)Super Duplex Stainless Steels (SDSS) have excellent corrosion resistance due to their high concentration of alloying elements like Cr, Mo, and N. There is still, however, disagreement on the role of tungsten in the corrosion ... -
The Effect of Hydrogen on the Corrosion Resistance of Stainless Steel in Seawater
Olavesen, Henrik Horten (Master thesis, 2018)Stainless steels have been used for various applications in the oil and gas industry for a long time due to, among others, their high corrosion resistance. However, immersion in seawater is demanding of the material because ... -
Use of the Critical Acidification Model to Estimate the Influence of W in the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels
Torres Rodriguez, Cristian; Iannuzzi, Mariano; Johnsen, Roy (Peer reviewed; Journal article, 2020)Two super duplex stainless steels (SDSS) with different W content, namely UNS S32750 (W-free) and UNS S39274 (2.1 wt.% W), were tested in simulated crevice corrosion environments to determine the influence of W on their ...