ANÁLISE DOS EFEITOS DE CORROSÃO SOB CHAPAS DE AÇO-CARBONO 1020 CAUSADAS POR AEROSSOL MARINHO E POLUIÇÃO: UM ESTUDO COMPARATIVO EM CHAPAS EXPOSTAS AO AMBIENTE E EM SIMULAÇÃO DE DUTOS SUBTERRÂNEOS

ANALYSIS OF THE EFFECTS OF CORROSION UNDER 1020 CARBON-STEEL PLATES CAUSED BY SEA AIR AND POLLUTION: A COMPARATIVE STUDY IN PLATES EXPOSED TO THE ENVIRONMENT AND IN SIMULATION OF UNDERGROUND DUCTS

Resumo

This work aims to analyze the effects of corrosion in different municipalities through the exposure of 1020 carbon-steel plates to the atmosphere and buried in soil. Sea air and pollution were treated as major corrosion agents and zinc has been tested to prove its effectiveness as a sacrificial anode. For this analysis, weighing and spectrophotometric methods were used to determine the iron mass loss after five months of exposure. From the data obtained, corrosion rates were calculated and compared based on different regional conditions. The results showed that the coastal region of the state of São Paulo presented higher corrosion rates compared to places of higher altitudes and further away from the sea, indicating that sea air and pollution are important agents in catalyzing the deterioration processes. In addition, zinc was efficient as a sacrificial anode, demonstrating its potential application as corrosion protection in 1020 carbon-steel plates.