NickelMaghrebV1, Main, Exploration, bibRecord, 000365

Corrosion Resistance and Galvanic Coupling of UNS N08031 Base Metal, Heat-Affected Zone, and Weld Metal in Phosphoric Acid at Different Temperatures

Identifieur interne : 000365 ( Main/Exploration ); précédent : 000364; suivant : 000366

Corrosion Resistance and Galvanic Coupling of UNS N08031 Base Metal, Heat-Affected Zone, and Weld Metal in Phosphoric Acid at Different Temperatures

Auteurs : E. Blasco-Tamarit [Espagne] ; D. M. Garcia-Garcia [Espagne] ; M. Ibanez Ferrandiz [Espagne] ; J. Garcia Anton [Espagne] ; A. Guenbour [Maroc]

Source :

Corrosion : (Houston, Tex.) [ 0010-9312 ] ; 2011.

RBID : Pascal:11-0143220

Descripteurs français

Pascal (Inist)
- Résistance corrosion, Corrosion effet pile, Couplage galvanique, Soudage, Zone thermiquement affectée, Assemblage soudé, Métal fondu soudage, Acide phosphorique, Température, Polarisation anodique, Passivation, Passivité.

English descriptors

KwdEn :
- Anodic polarization, Corrosion resistance, Galvanic corrosion, Galvanic coupling, Heat affected zone, Passivation, Passivity, Phosphoric acid, Temperature, Weld metal, Welded joint, Welding.

Abstract

Open-circuit potential tests and potentiodynamic anodic polarization curves have been carried out to obtain information about the electrochemical behavior of a highly alloyed austenitic stainless steel (UNS N08031) used as base metal (BM), heat-affected zone (HAZ) region, and weld metal (WM). The weld was performed using the gas tungsten arc welding technique (GTAW) with a nickel-based alloy (UNS N06059) as filler metal. The galvanic corrosion generated by the electrical contact between the base metal, the HAZ, and the weld metal was estimated from the polarization diagrams according to the mixed potential theory. The objective of the present work was to study the effect of the solution temperature on the corrosion resistance of the studied materials. These materials were tested in 5.5 M phosphoric acid (H₃PO₄) solution at 25°C, 40°C, 60°C, and 80°C. Results demonstrated that materials passivated spontaneously in the studied solution and their corrosion resistance decreased with temperature.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000132
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to stream PascalFrancis, to step Checkpoint: 000129
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Le document en format XML

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<front><div type="abstract" xml:lang="en">Open-circuit potential tests and potentiodynamic anodic polarization curves have been carried out to obtain information about the electrochemical behavior of a highly alloyed austenitic stainless steel (UNS N08031) used as base metal (BM), heat-affected zone (HAZ) region, and weld metal (WM). The weld was performed using the gas tungsten arc welding technique (GTAW) with a nickel-based alloy (UNS N06059) as filler metal. The galvanic corrosion generated by the electrical contact between the base metal, the HAZ, and the weld metal was estimated from the polarization diagrams according to the mixed potential theory. The objective of the present work was to study the effect of the solution temperature on the corrosion resistance of the studied materials. These materials were tested in 5.5 M phosphoric acid (H<sub>3</sub>
PO<sub>4</sub>
) solution at 25°C, 40°C, 60°C, and 80°C. Results demonstrated that materials passivated spontaneously in the studied solution and their corrosion resistance decreased with temperature.</div>
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Corrosion Resistance and Galvanic Coupling of UNS N08031 Base Metal, Heat-Affected Zone, and Weld Metal in Phosphoric Acid at Different Temperatures

Corrosion Resistance and Galvanic Coupling of UNS N08031 Base Metal, Heat-Affected Zone, and Weld Metal in Phosphoric Acid at Different Temperatures

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri