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Corrosion of AISI1018 and AISI304 steel exposed to sulfates

Millán Ramírez Ginneth Patricia, Baltazar-Zamora Miguel Angel, Méndez Ramírez Ce Tochtli, Niedostatkiewicz Maciej, Byliński Hubert

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

2024

Nr 3

58--70

This research analyses the behavior of corrosion, durability, and quality of reinforced concrete samples coated with two different materials when exposed to contaminated soil with sulfates. The initial assessment involved evaluating the water absorption rate of the coating materials before and after exposure to a solution containing 3% Na2SO4 + 3% MgSO4 + 3% K2SO4 + 3% CaSO4 to determine their durability. The corrosion potential and linear polarization resistance technique were employed to measure the corrosion rate. Carbon steel and AISI 304 steel bars were tested alongside a stainless counter electrode. The findings indicate that the solvent-based coating exhibited superior performance, demonstrating reduced corrosion and water absorption rates. Additionally, the presence of sulfates led to the formation of a surface layer on the concrete, initially aiding in limiting water penetration. However, over time, this layer eventually causes damage to the concrete from the inside out.