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Detalles de la revista
Formato
Revista
eISSN
2083-4799
ISSN
1730-2439
Publicado por primera vez
23 Sep 2008
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

Volumen 13 (2013): Edición 2 (June 2013)

Detalles de la revista
Formato
Revista
eISSN
2083-4799
ISSN
1730-2439
Publicado por primera vez
23 Sep 2008
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

3 Artículos
Acceso abierto

The Influence of Added Inhibitors on Corrosion of Steel in Concrete Exposed to Chloride Containing Solutions

Publicado en línea: 27 Jul 2013
Páginas: 5 - 11

Resumen

Abstract

Durability of concrete structures decrease due to corrosion in structures exposed to corrosive conditions. Several methods are adopted to minimize corrosion of steel in concrete; one of the methods is the use of inhibitors. In this work, the effect of inhibitor addition on corrosion of steel in concrete was investigated. Inhibitors added to concrete mix in different ratios, samples then immersed in 3.5% NaCl, and in Dead Sea Water for 15 months. Potential of steel reinforcement was measured by copper sulfate electrode according to ASTM C876. Results showed that an addition of 2% calcium nitrate or more was acceptable for adequate protection.

Keywords

  • concrete
  • steel
  • inhibitors
  • Calcium nitrate
Acceso abierto

Bainite Transformation in Experimental Fe-Cr-Mo-V-Ti-C Steel

Publicado en línea: 27 Jul 2013
Páginas: 12 - 18

Resumen

Abstract

The mechanism and kinetics of bainite transformation have been studied in Fe-Cr-Mo-V-Ti-C steel using high speed dilatometry and transmission electron microscopy (TEM) backed by thermodynamic analysis. At any temperature investigated did not occur the complete transformation of austenite. Obtained results confirm the incomplete reaction phenomenon with the cessation of the bainite transformation well before paraequilibrium is achieved. These experimental data indicate that bainitic ferrite forms by a displacive transformation mechanism, but soon afterwards, excess of carbon is partitioned into the residual austenite.

Keywords

  • mechanism of bainite transformation
  • kinetics
  • lower
  • upper bainite
Acceso abierto

Degradation of GFRP Marine Laminates with Nano Particle Modified Coatings

Publicado en línea: 27 Jul 2013
Páginas: 19 - 22

Resumen

Abstract

Water absorption and surface blistering behaviour was studied for polyester-matrix laminates with SiO2 nanoparticle reinforced gel coats. Accelerated water immersion tests at 37°C showed that addition of 10% nanoparticles increases blisters incubation time by ca. 50% compared to 5% and 0% nanoparticles composites.

Keywords

  • Polymer composites
  • nano composite
  • durability
  • scanning electron microscopy (SEM)
3 Artículos
Acceso abierto

The Influence of Added Inhibitors on Corrosion of Steel in Concrete Exposed to Chloride Containing Solutions

Publicado en línea: 27 Jul 2013
Páginas: 5 - 11

Resumen

Abstract

Durability of concrete structures decrease due to corrosion in structures exposed to corrosive conditions. Several methods are adopted to minimize corrosion of steel in concrete; one of the methods is the use of inhibitors. In this work, the effect of inhibitor addition on corrosion of steel in concrete was investigated. Inhibitors added to concrete mix in different ratios, samples then immersed in 3.5% NaCl, and in Dead Sea Water for 15 months. Potential of steel reinforcement was measured by copper sulfate electrode according to ASTM C876. Results showed that an addition of 2% calcium nitrate or more was acceptable for adequate protection.

Keywords

  • concrete
  • steel
  • inhibitors
  • Calcium nitrate
Acceso abierto

Bainite Transformation in Experimental Fe-Cr-Mo-V-Ti-C Steel

Publicado en línea: 27 Jul 2013
Páginas: 12 - 18

Resumen

Abstract

The mechanism and kinetics of bainite transformation have been studied in Fe-Cr-Mo-V-Ti-C steel using high speed dilatometry and transmission electron microscopy (TEM) backed by thermodynamic analysis. At any temperature investigated did not occur the complete transformation of austenite. Obtained results confirm the incomplete reaction phenomenon with the cessation of the bainite transformation well before paraequilibrium is achieved. These experimental data indicate that bainitic ferrite forms by a displacive transformation mechanism, but soon afterwards, excess of carbon is partitioned into the residual austenite.

Keywords

  • mechanism of bainite transformation
  • kinetics
  • lower
  • upper bainite
Acceso abierto

Degradation of GFRP Marine Laminates with Nano Particle Modified Coatings

Publicado en línea: 27 Jul 2013
Páginas: 19 - 22

Resumen

Abstract

Water absorption and surface blistering behaviour was studied for polyester-matrix laminates with SiO2 nanoparticle reinforced gel coats. Accelerated water immersion tests at 37°C showed that addition of 10% nanoparticles increases blisters incubation time by ca. 50% compared to 5% and 0% nanoparticles composites.

Keywords

  • Polymer composites
  • nano composite
  • durability
  • scanning electron microscopy (SEM)

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