Corrosion-cavitation-erosion: surface morphology study of a carbon steel in a multiphasic saline bath

Corrosion-cavitation-erosion: surface morphology study of a carbon steel in a multiphasic saline bath

ABSTRACT During 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, howev...

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Bibliographic Details
Published in:Matéria Vol. 24; no. 1
Main Authors: Silva, Fernando Nunes da, Oliveira, Plínio Melo de, Araújo, Nícolas Matheus da Fonseca Tinoco de Souza, Carvalho Filho, Eugênio Teixeira de, Cunha, Jardel Dantas da, Silva, Djalma Ribeiro da, Medeiros, João Telésforo Nóbrega de
Format: Journal Article
Language:English
Published: Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro; em cooperação com a Associação Brasileira do Hidrogênio, ABH2 2019
Subjects:
CONSTRUCTION & BUILDING TECHNOLOGY
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Tribochemistry
Surface Texture
Corrosion
Cavitation
Erosion
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Summary:ABSTRACT During 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.
ISSN:1517-7076
1517-7076
DOI:10.1590/s1517-707620190001.0639