Produção Nacional
Corrosion-cavitation-erosion: surface morphology study of a carbon steel in a multiphasic saline bath
2019; UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; Volume: 24; Issue: 1 Linguagem: Inglês
10.1590/s1517-707620190001.0639
ISSN1517-7076
AutoresFernando Nunes da Silva, Plínio Melo de Oliveira, Nícolas Matheus da Fonseca Tinoco de Souza Araújo, Eugênio Teixeira de Carvalho Filho, Jardel Dantas da Cunha, Djalma Ribeiro da Silva, João Telésforo Nóbrega de Medeiros,
Tópico(s)High-Temperature Coating Behaviors
ResumoDuring the production of petroleum and gas, the equipments employed for this activity are subjected to synergetic wear mechanisms, such as corrosion, corrosion-cavitation and corrosion-cavitation-erosion. Laboratory experiments has been performed to reproduce some of these mechanisms, however, sometimes the tests is not capable to recreate the complexities caused by hydrodynamic flows, physico-chemical and mechanical non-linearities. The main objective of this work is to evaluate specimens of low carbon steel under laboratory conditions, such as corrosive, cavitative-corrosive (CO2) and corrosive-erosive (CO2 + SiO2) environments. During the tests, the specimens were subjected to a stirring aqueous saline solution (0 and 5.0 m/s) at two levels of temperature, with gas injection (5.0 L/min) and contaminated with by solids particles of SiO2 (2.5% mass). The surface of the specimens subjected to upstream flow (0° in a cylindrical generatrix of the specimen), and downstream flows (180º) were analyzed by profilometry. The measurements of roughness and waviness of all specimens were statistically analyzed at a confidence level of 95% and significant differences observed in some matrices were discussed. The results suggest that the wear mechanisms that act in the upstream generatrix differ from that of specimen downstream.
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