Corrosión atmosférica del acero bajo en carbono en un ambiente marino polar. Estudio del efecto del régimen de vientos

Abstract

The present work studies the atmospheric corrosion of carbon steel (UNE-EN 10130) in a sub-polar marine environment (Artigas Antarctic Scientific Base (BCAA), Uruguay) as a function of site atmospheric salinity and exposure time. A linear relationship is established between corrosion rate and airborne salinity deposition rate, valid in the deposition range encountered ( 125-225 mg Cl -/m2.d), and a bilogarithmic relationship is established between corrosion and exposure time (1-4 years). Atmospheric salinity is related with the monthly wind speed average, based on the concept of the wind run. Chloride ion deposition rates of less than 300 mg Cl-/m2,d are related with remote (oceanic) winds and coastal winds basically of speeds between 1 -40 km/h, while higher deposition rates (300-700 mg Cl -/m2) correspond to coastal marine winds of a certain persistence with speeds of between 41-80 km/h.