Fragilização por hidrogênio em aços de baixa liga destinados ao transporte de óleo e gás

• Autor(a) principal: Mingotti, Bruna Silva [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/156955; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-08-28/000906220.pdf
• topic: Hidrogenio; Sulfetos; Corrosão; Hydrogen

The phenomenon of hydrogen embrittlement occurs very frequently in environments with presence of hydrogen sulphide (H2S) due to its dissolution generating H+ ions. This environment, known as sour, is of great importance for study due to its harmful impact on the environment, which can cause accidents with economic and even human losses in the oil and gas market. The continuous advance to improve the materials used for operation in these environments is imperative today, due to the projection of high oil consumption for the coming years in Brazil and in the World. In this work the theories behind hydrogen embrittlement in the most used steels in tubes, pressure vessels and naval structures were raised. It is HSLA (High Strength and Low Alloy) steels that are used in applications that require relatively low cost, good mechanical strength and good fracture toughness. The steels used to transport oil and gas are standardized by API 5L which defines the class of steels by their mechanical strength. With this, protection methods were developed for pipes already in service, and corrosion inhibitors are the most economically viable. In addition, methods of monitoring against hydrogen embrittlement were studied through hydrogen sensors that indicate the passage through the wall of the tubes, connected to online systems that detect the damage in real time