Resumen

VALDES CLEMENTE, Cecilia; CASTANEDA VALDES, Abel; CORVO PEREZ, Francisco  y  MARRERO AGUILA, Rigoberto. Study of the atmospheric corrosion of carbon steel in a coastal area of oil extraction and refining in Cuba. Rev. CENIC Cienc. Quím. [online]. 2020, vol.51, n.2, pp. 194-208.  Epub 16-Jul-2020. ISSN 2221-2442.

Atmospheric corrosion of carbon steel AISI-1018 was studied in a coastal zone of tropical climate of Cuba with the presence of technologies aimed at the oil extraction and refining in operation. Two outdoor exposure sites were placed in the study zone. Wooden racks with device for determination of aggressiveness agent’s monthly and averages annual, a sensor for the measurement of relative humidity-temperature complex, as well as fifteen specimens of carbon steel AISI-1018 for determination of corrosion rate monthly and annual, were installed in each exposure site placed at distance from the sea of 70 and 50 m without shielding effect. Corrosivity category of the atmosphere estimated from the typical characterization of the atmospheric environment and from the indirect values of corrosion ratewas similarity to determine from the annual values of corrosion rate determined directly for carbon steel at the two exposure sites in the study zone. Corrosivity categories of the atmosphere determined was high (C4). The atmospheric corrosion of carbon steel is influenced not only by the wet deposition of sulfate ions, but also by the wet deposition of chloride ions at both exposure sites. The relative humidity-temperature complex had a higher influence on the atmospheric corrosion of carbon steel at the exposure site placed at a higher altitude on sea level in the study area. The effect of height on sea level also influenced in a different classification ofthe types of atmosphere between the two exposure sites.

Palabras clave : atmospheric corrosion; carbon steel; sulphate; chloride; aggressivity corrosion.