Resumen

CASTANEDA VALDES, Abel; VALDESCLEMENTE, Cecilia; CORVOPEREZ, Francisco  y  MARRERO AGUILA, Rigoberto. Atmospheric corrosion study of carbon steel in the oil refinery of Havana, Cuba. Rev. CENIC Cienc. Quím. [online]. 2020, vol.51, n.2, pp. 126-146.  Epub 16-Jul-2020. ISSN 2221-2442.

Atmospheric corrosion of carbon steel was studied in the oil refinery of Havana, Cuba. Four exposure sites, three in outdoor exposure condition and one in indoor exposure condition were placed in the refinery during one year of study. Corrosivity categories of the atmosphere higher, C5 very high and CX extreme, were expected for atmosphere classified as industrial-coastal, industrial and industrial highly polluted, due to high deposition of sulfate ions. Equivalence between two ways of estimation of corrosivity categories of the atmosphere was demonstrated for the atmospheres classified in the outdoor exposure condition. The high deposition of sulfate ions higher than chlorides, bring as results difference between the category of estimation and determination for atmosphere classified as industrial and industrial highly polluted. The category high (C4) was estimated and medium (C3) was determined. However, for an atmosphere classified as industrial-coastal, where the deposition of chloride ions is higher without being higher than sulphate ions, there was equivalence between the two ways of estimation and determination high (C4) of aggressivity corrosion for outdoor exposure condition. The chloride deposition salts remain as the most influential factor in the atmospheric corrosion of carbon steel, demonstrated in this study, for an atmosphere classified as industrial highly polluted. For the indoor exposure condition, there was equivalence between the estimation and determination of aggressivity corrosion of the atmosphere high (IC4) in the refinery. The increase in RH is the most influential factor in the atmospheric corrosion of carbon steel.

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