Atmospheric Corrosion of Reinforced Concrete Steel in Tropical Coastal Regions

Castañeda, Abel; Corvo, Francisco; Howland, Jaun José; Pérez, Tomás A.

doi:10.4186/ej.2013.17.2.1

Cited by 7 publications

(10 citation statements)

References 21 publications

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“…Parameter A can be considered as in the breaking wave zone, in the coast line. Similar results respecting versus distance from the sea in several coastal zones in the world have been reported [15][16][17][18][19][20][21]. They did not establish corrosivity categories of the atmosphere.…”

Section: Comparison Between Behaviors Of Andsupporting

confidence: 82%

“…Changes in versus distance from the sea at different coastal sites have been determined [15][16][17][18][19][20][21]; however, they have not been linked directly to corrosivity categories of the atmosphere under outdoor and indoor exposure conditions. No attention to Sulphur compounds deposition rate ( ) by airborne salinity and how it changes respecting distance from the sea has been given produced.…”

Section: Introductionmentioning

confidence: 99%

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Outdoor-Indoor Atmospheric Corrosion in a Coastal Wind Farm Located in a Tropical Island

Castañeda¹,

Corvo²,

Fernández³

et al. 2017

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Abstract. Atmospheric corrosion is important to consider for energy production and transmission. Important and valuable information have been accumulated in this subject; however, the application of new knowledge obtained is not completed. In order to contribute to a decrease in economic losses caused by atmospheric corrosion in wind farms, studies toward application of this knowledge should be carried out. One of the most common reasons for the failure of coastal structures and infrastructures is deterioration failure which is the result of structure deterioration and lack of project maintenance. Atmospheric corrosion was evaluated at outdoor and indoor exposure sites located at different distances from the sea in a wind farm region. Carbon and galvanized steel, copper and aluminum specimens were exposed. Main pollutants and atmospheric parameters were measured. Significant differences between outdoor corrosivity determined by dose response functions established on ISO standard respecting direct weight loss evaluation were found. Estimation carried out using dose response functions overestimate corrosivity (excepting copper). Main factors causing outdoor corrosion are different to indoor. Very high outdoor and indoor corrosivity classifications were determined.

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Section: Comparison Between Behaviors Of Andsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Outdoor-Indoor Atmospheric Corrosion in a Coastal Wind Farm Located in a Tropical Island

Castañeda¹,

Corvo²,

Fernández³

et al. 2017

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“…"I" entonces se calcula por la expresión [2]: Donde: m t : masa de la probeta de ensayo en g. a: Área de la sección transversal de la probeta (mm 2 ) d: Densidad del agua (0,001 g/mm 3 )…”

Section: Resultsunclassified

“…The studies realized to evaluate the aggressive levels in the marine coastal environment (where there is an important part of the buildings and infrastructure construction of the Country) show higher levels of chloride deposition that the considered in the International Standard ISO (2,3). In addition to this more that the 80% of the aggregates used in Cuba are limestone grinded aggregates, with a low content of fines (in special the sands) and with absorption values that could be higher than 1% of the aggregate weight.…”

Section: Introductionmentioning

confidence: 99%

“…Los estudios efectuados para evaluar el nivel de agresividad en el entorno marino costero donde se ubica una gran parte de las edificaciones y de toda la infraestructura constructiva del país, mostraron niveles de deposición de cloruros muy superiores a los considerados como altamente agresivos en la Norma Internacional ISO (2,3). A esto se suma que más el 80% de los áridos utilizados en Cuba son calizos, triturados, con bajo contenido de finos (en especial las arenas) y que en general presentan valores de absorción elevados, que pueden llegar a ser superiores al 1% en peso.…”

Section: Introductionunclassified

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Estudio de la absorción capilar y la sorptividad de hormigones con áridos calizos cubanos

Howland¹,

Martin²

2013

Mater. construcc.

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The objective of this study was to demonstrate the possibility to obtain concretes in Cuba with values of effective porosity below of 10%, using limestone aggregates with high levels of absorption (higher than 1% in many cases), and values of Sorptivity below of 5 x 10-5 m/s 1/2 as is established in the document prepared by the DURAR Latin Working Group, for structures exposed to very aggressive environments. The experimental results showed that the use of the trial method of capillary absorption of Göran Fagerlund, were obtained concretes with effective porosity below of the 10%, for water/cement ratios of 0.4 and 0.45, but the values of sorptivities were very high. Nevertheless the subsequent use of the trial method of the ASTM C1585, that use cylinders probes with bigger depth and different processing, permits to obtain the desired sorptivity values for water/cement ratios of 0.4 and 0.45 whenever would be fulfilled the Good Practices of the Construction.Keywords: concrete; limestone aggregate; transport properties; permeability; durability. RESUMENEl objetivo del estudio fue demostrar la posibilidad de lograr en Cuba, con el empleo de áridos calizos de elevada absorción (mayores del 1% en muchos casos), hormigones con valores de porosidad efectiva inferiores al 10% y de velocidad de absorción capilar (Sorptividad) inferiores a 5 x 10-5 m/s 1/2 , tal como establece el documento elaborado por la RED DURAR del CYTED para estructuras expuestas a ambientes muy agresivos. Los resultados experimentales mostraron que con la aplicación del método de ensayo de absorción capilar de Göran Fagerlund se obtuvieron porosidades efectivas inferiores al 10% para relaciones agua/cemento de 0,4 y 0,45, pero los valores de sorptividad fueron muy elevados. No obstante la aplicación posterior del método de ensayo de la ASTM C1585 que utiliza probetas de mayor espesor y diferente tratamiento, permitió obtener los valores indicados de sorptividad para relaciones agua/cemento de 0,4; 0,45 siempre que se cumplan las Buenas Prácticas constructivas. Palabras

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Atmospheric corrosion study in a harbor located in a tropical island

Castañeda

Valdés

Corvo

2018

Materials & Corrosion

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Atmospheric corrosion level in tropical coastal zones is usually very significant.Corrosion control and preservation of infrastructure in these regions is very important to increase durability. Atmospheric corrosion of carbon steel, copper, galvanized steel, and aluminum was evaluated in a coastal industrial port zone located in a tropical island during 1 year. Samples were exposed at seven outdoor corrosion sites located at different distances from the sea. Main atmospheric pollutants, relative humidity, and air temperature were monitored during the exposure time. The existence of a combination between two of the most aggressive atmosphere types was determined (coastal-industrial and industrial-coastal). Changes in RH and temperature influenced 1462 |

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Atmospheric Corrosion of Reinforced Concrete Steel in Tropical Coastal Regions

Cited by 7 publications

References 21 publications

Outdoor-Indoor Atmospheric Corrosion in a Coastal Wind Farm Located in a Tropical Island

Outdoor-Indoor Atmospheric Corrosion in a Coastal Wind Farm Located in a Tropical Island

Estudio de la absorción capilar y la sorptividad de hormigones con áridos calizos cubanos

Atmospheric corrosion study in a harbor located in a tropical island

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