Corrosion behavior of friction stir welded API X70 steel joints
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2019
Autores IPEN
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BRAZIL MRS MEETING, 18th
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Resumo
The ever-increasing demand for fossil fuels has pushed the oil and gas industry to
search for new deep water wells and in more aggressive environmental
conditions, such as the pre salt where the presence of CO2 and H2S
concentrations, has led to the development of new materials and manufacturing
processes. For pipeline construction, Friction Stir Welding (FSW) process is a
promising candidate to be used in the girth welding procedure, and research
studies must be carried out to understand the effect of this new processing on the
pipeline life under the in-service conditions (environment, fatigue). The present
work is part of a research project aiming to investigate the effect of a saline
environment on the mechanical properties of an API-5L-X70 steel, welded by
FSW. Therefore, in this work, the results of the corrosion behavior analysis
carried out on the FSW welded joint, considering a 3.5% NaCl solution, are
presented. The corrosion behavior was investigated based on potentiodynamic
polarization tests on the different regions of FSW welded joint, i.e., the base metal
(BM) and stirred zone (SZ). Gel visualization tests, considering the whole welded
joint, were also conducted. The two FSW regions showed similar polarization
curves in terms of corrosion potential (Ecorr), corrosion current density (icorr) as
well as anodic current density values. In the gel tests, a preferential localized
attack on any of the regions of the FSW welded joint was not observed. These
results can be interpreted as evidence that the corrosion behavior of the FSW
welded joint was not significantly affected by the different metallurgical
microstructures formed by the FSW processing.
Como referenciar
GIAROLA, JOSEANE M.; PEREIRA, GUALTER S.; KUGELMEIER, CRISTIE L.; TERADA, MAYSA; MARCOMINI, JOSE B.; ROVERE, CARLOS A.D.; AVILA, JULIAN A.; BOSE FILHO, WALDEK W. Corrosion behavior of friction stir welded API X70 steel joints. In: BRAZIL MRS MEETING, 18th, September 22-26, 2019, Balneário Camburiú, SC. Abstract... São Carlos, SP: Aptor Software, 2019. p. 2171-2171. Disponível em: http://repositorio.ipen.br/handle/123456789/31036. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.