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Informacje o czasopiśmie
Format
Czasopismo
eISSN
2083-4799
ISSN
1730-2439
Pierwsze wydanie
23 Sep 2008
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

Tom 13 (2013): Zeszyt 2 (June 2013)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2083-4799
ISSN
1730-2439
Pierwsze wydanie
23 Sep 2008
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

3 Artykułów
Otwarty dostęp

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

Data publikacji: 27 Jul 2013
Zakres stron: 5 - 11

Abstrakt

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
Otwarty dostęp

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

Data publikacji: 27 Jul 2013
Zakres stron: 12 - 18

Abstrakt

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
Otwarty dostęp

Degradation of GFRP Marine Laminates with Nano Particle Modified Coatings

Data publikacji: 27 Jul 2013
Zakres stron: 19 - 22

Abstrakt

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 Artykułów
Otwarty dostęp

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

Data publikacji: 27 Jul 2013
Zakres stron: 5 - 11

Abstrakt

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
Otwarty dostęp

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

Data publikacji: 27 Jul 2013
Zakres stron: 12 - 18

Abstrakt

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
Otwarty dostęp

Degradation of GFRP Marine Laminates with Nano Particle Modified Coatings

Data publikacji: 27 Jul 2013
Zakres stron: 19 - 22

Abstrakt

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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