Corrosion resistance of lean duplex stainless steel 2101 welded by the gas tungsten arc welding double fusion (GTAW-DF) process for use in the citrus juice industry
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2022
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
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Resumo
Tanks for storage of products in the food industry are usually made of stainless steel, as they must
present hygiene and safety standards to ensure product quality. These stainless steels are finding
increasing demand due to their good combination of mechanical properties, weldability and
corrosion resistance. However, they are susceptible to localized corrosion when exposed to high
temperatures, as during the welding process. In this study, welding of the 2101 lean duplex
stainless steel (LDSS) was carried out by gas tungsten arc welding double fusion (GTAW-DF)
process using ER 2209 weld consumable. This work aims to investigate the influence of optimized
welding parameters on the corrosion performance of the 2101LDSS. The correlation between
microstructure and electrochemical behavior of the fusion line (FL) and heat-affected zone (HAZ)
has been investigated. In the study, six welded samples were manufactured with various welding
parameters, specifically the welding current, travel speed and heat input. The microstructure of the
welding zone was characterized by scanning electron microscopy (SEM) and its mechanical
properties were evaluated by microhardness test. A mini-cell and Syringe Cell were used to
characterize the electrochemical behavior of the different welded zones by means of the double
loop electrochemical potentiokinetic reactivation test (DL-EPR) and potentiodynamic polarization
tests. The results showed that the welding parameters tested in this study significantly affected the
corrosion resistance of the 2101LDSS. The heat-affected zone (HAZ) was the zone most susceptible
to localized corrosion and the specific region most affected by corrosion process was that of the
2101LDSS adjacent to the FL. The steel used as filler alloy (ER 2209) is significantly more resistant to
corrosion than the 2101LDSS, and the galvanic coupling between the 2101 LDSS and the ER 2209
promoted galvanic corrosion in the 2101 adjacent to the ER 2209.
Como referenciar
BUGARIN, A.F.; VIVEIROS, B.G.; TERADA, M.; SILVA, L.S.; GUILHERME, L.H.; NEVES, M.D.; COSTA, I. Corrosion resistance of lean duplex stainless steel 2101 welded by the gas tungsten arc welding double fusion (GTAW-DF) process for use in the citrus juice industry. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33784. Acesso em: 19 Apr 2024.
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.