Atmospheric Corrosion in Metal Materials Without and with Coating Systems in Tuxpan, Ver., Mexico

摘要

In this work was studied the behavior of atmospheric corrosion in metals without and with aluminum based marine coating systems applied to carbon steel, aluminum, copper and zinc and its relationship with aggressive parameters in the city of Tuxpan, Veracruz, Mexico. The specimens were exposed to the environment in an exposure panel (Rack), in order that the metals interact with the atmosphere. The corrosive deterioration of each exposed material was evaluated by electrochemical tests; Electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) and potentiodynamic polarization curves, on a SP-150 potentiostat, a computer with EC-Lab software and an electrochemical cell. The exposition of metallic samples was in year 2018, the test was made in every season. In autumn and winter, corrosion rates are high, causing wear in metallics materials. As a result, it is recommended to apply organic coatings to super metallic ones to extend their useful life.