Influence of Exposure Time on Morphological and Electrochemical Properties of Corrosion Products Formed by High Temperature Sulfidation of AISI/SAE-1020 Steel

Abstract

In the present investigation, the influence of exposure time on the morphological and electrochemical properties of corrosion products formed on the surface of AISI/SAE-1020 steel was determined, exposed to conditions of a transfer line that enters the atmospheric distillation unit in the opportunity crude oils processing, applying gravimetry and electrochemical measurements. The exposure times used for gravimetric tests were between 24 and 330 hours. Discontinuous gravimetric tests were carried out in a Parr 4848 dynamic autoclave using a heavy crude oil (HCO) with sulfur content of 2.55 %wt. These results contribute to national and international scientific research and petrochemical industry by using a heavy crude oil contaminant such as sulfur, to reduce the corrosion rate of an AISI/SAE-1020 steel from the formation of iron sulfides on its surface.