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http://comimsa.repositorioinstitucional.mx/jspui/handle/1022/124| ASSESSMENT ON THE EFFECT OF DIFFUSIBLE HYDROGEN IN ASTM A516 GR. 70 PRESSURE VESSELS FOR SOUR WET GAS TREATMENT UNDER SULFIDE STRESS CORROSION | |
| BRENDA SOFIA CABELLO ARIZPE | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Pressure vessels, Finite Element, Corrosion, SSC, ASTM A516 | |
| Refining and petrochemical industry for gas processing and energy generation require equipment for such processes. These equipment undergo aggressive conditions where corrosion generates by acid gas in presence of hydrogen sulfide can lead to failure of a component due to hydrogen damage. Hydrogen sulfide is associated with the corrosion mechanism of sulfide stress corrosion cracking (SSCC) in weldments with high strength properties located in carbon steel pressure vessels exposed to H2S containing environments. The effect of SSCC was studied on a typical ASTM A516 grade 70 steel-welded joint exposed to H2S variating concentration and time. In this work, CTOD testing, microstructural analysis and SEM observations were performed in exposed samples to evaluate the effect of hydrogen damage in mechanical properties of the weldment. CTOD is a fracture toughness test that seeks to describe the materials property for a crack to resist fracture. Although exposure concentrations were low compared to actual process concentrations, results show that as the exposure time increases, damage is evident in each stage. Fissures caused by hydrogen penetration along grain boundaries in micrograph specimens were obtained. Results were adjusted into an exponential non-linear regression with the ability to predict remaining lifetime of a component given a certain hydrogen sulfide concentration and maximum permissible crack size. | |
| 2017-08 | |
| Tesis de maestría | |
| Inglés | |
| TECNOLOGÍA INDUSTRIAL | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | TESIS DE MAESTRÍA EN TECNOLOGÍA DE LA SOLDADURA INDUSTRIAL |
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| BrendaCabello-PDFTesis.pdf | 6.97 MB | Adobe PDF | Visualizar/Abrir |