Evaluation of the behavior of austenitic stainless steel AISI 304 in different soils with acid PH

The study of the corrosion of buried structures becomes necessary as their use increases. This study aims to evaluate the corrosion of AISI 304 stainless steel samples inserted in three different types of soil (Neossolo, Cambisol and Latosol) with a forced and conventional acidic pH during a period of six months. The corrosion behavior of the stainless steel samples was verified through the potentiodynamic polarization curves and the corrosion potential. The results demonstrated that the Neossolo presented a lower corrosive potential in the six-month period analyzed in acidic and natural pH conditions. The samples in Ambisol and Latosol presented similar results in the acidic pH coding. The results did not vary significantly in soils under natural conditions due to the non-rupture of the passive Cr2O3 layer. All samples with an acidic pH presented surface corrosion pits. The study of the corrosion of buried structures becomes necessary as the use of these structures increases, especially in buried pipelines and water.