Corrosion of steel reinforced concrete in the tropical coastal atmosphere of Havana City, Cuba

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 |

show abstract

“…Corrosivity category determined for most common construction metallic materials and reinforced concrete is very high (C5).

C l^{-} D R

higher than 1000 mg m −2 d −1 (dry plate devices) has been reported in the coastal tropical climate of Havana City, without shielding conditions …”

Section: Resultsmentioning

confidence: 91%

Atmospheric corrosion study in a harbor located in a tropical island

Castañeda

Valdés

Corvo

2018

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

show abstract

“…A correlation was made between reported atmospheric pollutants for Havana City and their level of concentration on the air for the last decade (Castañeda et al, 2012;Placeres et al, 2004;Varona et al, 2011). From these results, the classification of the atmosphere and time of wetness (TOW) were established (ISO, 2012).…”

Section: Identification Of the Type Of Environmentmentioning

confidence: 99%

“…The housing fund is over 50 years of age and heritage buildings is almost five centuries old since the first foundations, however there is still no efficient mechanism to estimate the direct and indirect losses related to corrosion damage and deterioration of materials (Castañeda & Rodriguez, 2014). Some studies have been carried out on the relationship between the climatic parameters and the concentration levels of atmospheric pollutants in the Capital (Castañeda et al, 2012;F. Corvo et al, 2009;Oroza, 2016) but deeper knowledge about the effect of air pollution on the preservation of historic buildings in Havana still lacking.…”

Section: Introductionmentioning

confidence: 99%

Impacto de la contaminación atmosférica en las edificaciones patrimoniales de La Habana, Cuba. Efectos para un futuro cambio climático.

Hernández¹

2018

Rev. ing. constr.

View full text Add to dashboard Cite

In the last decades, the quality of the air on the Old City of La Habana has become a growing concern regarding the durability and the aesthetics of the historical buildings. The aim of this work is to assess the impact of atmospheric pollutants on the conservation of the historic buildings of La Habana, declared World Heritage Site by UNESCO in 1982. The city located between 20-2600 m from the north coast is constantly exposed to increasing levels of atmospheric pollutants mainly from anthropogenic sources. The future projections on climate for the Caribbean area reflect changes in temperature, humidity and rainfall levels, which will have implications for the preservation of the heritage buildings.

show abstract

“…It is a consequence of high (C4), very high (C5) and extreme (CX) corrosivity categories of the atmosphere at coastal locations without shielding conditions (Castañeda et al, 2013(Castañeda et al, , 2014. High corrosivity categories of the atmosphere were expected due to high levels of chloride deposition rate (Cl -DR).…”

Section: Introductionmentioning

confidence: 99%

Penetration of marine aerosol in a tropical coastal city: Havana

Castañeda¹,

Corvo

Howland³

et al. 2018

Atm

Self Cite

View full text Add to dashboard Cite

RESUMENLas edificaciones son obstáculos importantes para el ingreso y distribución del aerosol marino en la atmósfera de clima tropical costero de La Habana. Debido a este efecto de apantallamiento, a escasa distancia del mar se aprecia un considerable decremento en la deposición de iones cloruro. Las partículas de cloruro de mayor tamaño y peso suspendidas en el aerosol pueden depositarse en las inmediaciones del rompiente de las olas. La velocidad promedio anual del viento tuvo un efecto significativo en el incremento de la deposición de cloruros en el sitio de exposición más cercano al mar, donde la influencia de las edificaciones es insignificante y los niveles pronosticados de agresividad corrosiva son alto, muy alto y extremo. La disminución de la temperatura del aire fue el factor climático que tuvo mayor influencia en la deposición de iones cloruro. La penetración del aerosol marino es ocho veces menor en La Habana con relación a otros sitios sin condiciones de apantallamiento. La distribución de la salinidad transportada por el aire dentro de la ciudad es diferente respecto de la encontrada fuera de ésta. ABSTRACTBuilding structures constitute obstacles for the entrance and distribution of marine aerosol in the atmosphere of Havana City (tropical coastal climate). Due to the shielding effect caused by building structures, a considerable decrease in chloride deposition is determined at a short distance from the sea. Heavier and larger-sized chloride aerosol particles can settle down in the vicinity of breaking waves. The annual average wind speed showed significant influence in increasing chloride deposition at the exposure site close to the sea, where the effect of building structures is negligible and the predicted levels of corrosivity of the atmosphere are high, very high and extreme. Air temperature was the main climatic factor influencing chloride deposition (when temperature decreases, chloride deposition increases). Penetration of marine aerosol is eight times lower in Havana City with respect to other sites without obstacles. Airborne salinity distribution inside the city is different than outside the city.Keywords: Marine aerosol, distance from the sea, chloride deposition, shielding condition, corrosivity categories. 88A. Castañeda et al. IntroductionA significant deterioration due to atmospheric corrosion of reinforced concrete structures built with metallic materials, more often used in the construction industry as carbon steel and galvanized steel, is observed in the tropical coastal climate in Havana City. It is a consequence of high (C4), very high (C5) and extreme (CX) corrosivity categories of the atmosphere at coastal locations without shielding conditions (Castañeda et al., 2013(Castañeda et al., , 2014. High corrosivity categories of the atmosphere were expected due to high levels of chloride deposition rate (Cl -DR). However, penetration studies carried out in Cuba and some Latin-American countries about marine aerosol as a factor in the initiation and propagation of atmospheric cor...

show abstract

Corrosion of steel reinforced concrete in the tropical coastal atmosphere of Havana City, Cuba

Cited by 14 publications

References 17 publications

Atmospheric corrosion study in a harbor located in a tropical island

Atmospheric corrosion study in a harbor located in a tropical island

Impacto de la contaminación atmosférica en las edificaciones patrimoniales de La Habana, Cuba. Efectos para un futuro cambio climático.

Penetration of marine aerosol in a tropical coastal city: Havana

Contact Info

Product

Resources

About