Corrosion study of steels exposed over five years to the humid tropical atmosphere of Panama

The results of assessing five-year corrosion of low-carbon and conventional weathering steels exposed to the Panamanian tropical atmosphere is presented. Two different test sites, one in Panama City: 5 km from the shoreline of the Pacific Ocean, and another in the marine environment of Fort Sherman,...

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Bibliographic Details
Published in:Hyperfine interactions 2017-11, Vol.238 (1), p.1-10, Article 37
Main Authors: Jaén, Juan A., Iglesias, Josefina
Format: Article
Language:English
Subjects:
13-18 November 2016
Atmospheric corrosion
Atomic
Condensed Matter Physics
Corrosion products
Corrosion rate
Corrosion resistant steels
Corrosion tests
Exposure
Fourier transforms
Hadrons
Heavy Ions
Infrared spectroscopy
Low temperature
Marine environment
Molecular
Mossbauer spectroscopy
Nuclear Physics
Optical and Plasma Physics
Panama
Panama City
Physics
Physics and Astronomy
Pollutants
Proceedings of the 15th Latin American Conference on the Applications of the Mössbauer Effect (LACAME 2016)
Room temperature
Structural steels
Surfaces and Interfaces
Thin Films
Tropical environments
Weathering steels
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Summary:The results of assessing five-year corrosion of low-carbon and conventional weathering steels exposed to the Panamanian tropical atmosphere is presented. Two different test sites, one in Panama City: 5 km from the shoreline of the Pacific Ocean, and another in the marine environment of Fort Sherman, Caribbean coast of Panama; namely, Fort Sherman Coastal site: 100 m from coastline. The corrosion products, formed in the skyward and earthward faces in the studied tropical environment, were mainly identified using room temperature and low temperature (15 K) Mössbauer spectroscopy, and ATR-FTIR. In all samples, lepidocrocite ( γ -FeOOH) and goethite ( α -FeOOH) were the main constituents. Some maghemite ( γ -Fe 2 O 3 ), was also identified in Tocumen by Mössbauer spectroscopy and traces of feroxyhyte ( δ -FeOOH) using ATR-FTIR. The corrosion rate values obtained are discussed in light of the atmospheric exposure conditions and atmospheric pollutants.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-017-1416-8