Details
| Original language | English |
|---|---|
| Article number | 601 |
| Journal | Journal of the Brazilian Society of Mechanical Sciences and Engineering |
| Volume | 46 |
| Issue number | 10 |
| Early online date | 11 Sept 2024 |
| Publication status | Published - Oct 2024 |
Abstract
In this work, the influence of underwater wet welding process parameters on the corrosion resistance of welds produced with oxyrutile electrode was investigated. Although in the standard for underwater wet welds (AWS D3.6 M: 2017), only mechanical strength specifications are required, corrosion is a critical factor since its occurrence is a major cause of mechanical failure in offshore metallic structures. Underwater wet welding experiments were performed in a hyperbaric chamber using a gravity mechanized welding device in direct (DCEN) and reverse (DCEP) welding polarities at currents of 150 A and 180 A and depths of 0.3 and 30 m. Corrosion resistance of the welded zones was evaluated by electrochemical techniques of electrochemical impedance spectroscopy and potentiodynamic polarization in NaCl solution 3.5 wt.%, to reproduce the seawater salinity. The electrochemical results showed different behaviors among the direct and inverse polarities. In DCEN, the corrosion potential values (ECorr) were close, and the corrosion current densities (iCorr) varied, while in DCEP, an inverse behavior was observed. Although the lowest corrosion rates were obtained in direct polarity, in both polarities at the lowest welding current the welds showed a higher corrosion resistance.
Keywords
- Corrosion resistance, Electrochemical impedance spectroscopy, Oxyrutile electrode, Underwater wet welding, Welded zones
ASJC Scopus subject areas
- Engineering(all)
- Automotive Engineering
- Engineering(all)
- Aerospace Engineering
- Engineering(all)
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
- Mathematics(all)
- Applied Mathematics
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In: Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 46, No. 10, 601, 10.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Corrosion resistance of underwater wet welds produced with a new oxyrutile electrode
T2 - influence of polarity, welding current, and depth
AU - Cisquini, P.
AU - Lobo, E. J.S.
AU - Moreno-Uribe, A. M.
AU - Pessoa, E. C.P.
AU - Bracarense, A. Q.
AU - Lins, V. F.C.
N1 - Publisher Copyright: © The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering 2024.
PY - 2024/10
Y1 - 2024/10
N2 - In this work, the influence of underwater wet welding process parameters on the corrosion resistance of welds produced with oxyrutile electrode was investigated. Although in the standard for underwater wet welds (AWS D3.6 M: 2017), only mechanical strength specifications are required, corrosion is a critical factor since its occurrence is a major cause of mechanical failure in offshore metallic structures. Underwater wet welding experiments were performed in a hyperbaric chamber using a gravity mechanized welding device in direct (DCEN) and reverse (DCEP) welding polarities at currents of 150 A and 180 A and depths of 0.3 and 30 m. Corrosion resistance of the welded zones was evaluated by electrochemical techniques of electrochemical impedance spectroscopy and potentiodynamic polarization in NaCl solution 3.5 wt.%, to reproduce the seawater salinity. The electrochemical results showed different behaviors among the direct and inverse polarities. In DCEN, the corrosion potential values (ECorr) were close, and the corrosion current densities (iCorr) varied, while in DCEP, an inverse behavior was observed. Although the lowest corrosion rates were obtained in direct polarity, in both polarities at the lowest welding current the welds showed a higher corrosion resistance.
AB - In this work, the influence of underwater wet welding process parameters on the corrosion resistance of welds produced with oxyrutile electrode was investigated. Although in the standard for underwater wet welds (AWS D3.6 M: 2017), only mechanical strength specifications are required, corrosion is a critical factor since its occurrence is a major cause of mechanical failure in offshore metallic structures. Underwater wet welding experiments were performed in a hyperbaric chamber using a gravity mechanized welding device in direct (DCEN) and reverse (DCEP) welding polarities at currents of 150 A and 180 A and depths of 0.3 and 30 m. Corrosion resistance of the welded zones was evaluated by electrochemical techniques of electrochemical impedance spectroscopy and potentiodynamic polarization in NaCl solution 3.5 wt.%, to reproduce the seawater salinity. The electrochemical results showed different behaviors among the direct and inverse polarities. In DCEN, the corrosion potential values (ECorr) were close, and the corrosion current densities (iCorr) varied, while in DCEP, an inverse behavior was observed. Although the lowest corrosion rates were obtained in direct polarity, in both polarities at the lowest welding current the welds showed a higher corrosion resistance.
KW - Corrosion resistance
KW - Electrochemical impedance spectroscopy
KW - Oxyrutile electrode
KW - Underwater wet welding
KW - Welded zones
UR - http://www.scopus.com/inward/record.url?scp=85203595729&partnerID=8YFLogxK
U2 - 10.1007/s40430-024-05178-1
DO - 10.1007/s40430-024-05178-1
M3 - Article
AN - SCOPUS:85203595729
VL - 46
JO - Journal of the Brazilian Society of Mechanical Sciences and Engineering
JF - Journal of the Brazilian Society of Mechanical Sciences and Engineering
SN - 1678-5878
IS - 10
M1 - 601
ER -