Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
EVALUATION OF CORROSIVE PROCESSES, OF 304 STEEL IN BIODIESEL ENVIRONMENT, BY ELECTROCHEMICAL NOISE TECHNIQUE
Submission Author:
Juliana David , PR , Brazil
Co-Authors:
Juliana David, Vinícius da Silva Moreira de Oliveira, Renata Bachmann Guimarães Valt, Maria José Jerônimo de Santana Ponte, Haroldo Ponte
Presenter: Juliana David
doi://10.26678/ABCM.COBEM2023.COB2023-0369
Abstract
The concern with the increase in the emission of greenhouse gases in the atmosphere led to the development of biofuels, as a way to reduce the use of fossil fuels. Despite the promising use of this alternative energy source, the apparent deterioration and corrosion of metal parts that remain in contact with the biofuel make a better understanding of its oxidative behavior necessary. Biofuels are not considered corrosive materials, but because of some characteristics, their corrosion capacity may change over time. Thus, the analysis of their behavior is of interest, for example, in storage before distribution to the market, avoiding the use of corrupted biofuel, which can interact with different metallic materials and weaken them by corrosion. Thus, this work aims to evaluate the effectiveness of using the electrochemical noise technique to monitor the corrosion of AISI 304 stainless steel in a system that emulates a biodiesel storage tank. This technique is relatively new and promising, providing real-time monitoring of the phenomenon by detecting the spontaneous current and potential fluctuations that the electrochemical interaction presents. In addition, it is a passive technique, not requiring an invasive procedure in the cell where the corrosion study takes place, ensuring less probability of interference in the results, and greater safety, particularly because of the lower risk of explosion or ignition for systems that analyze flammable fluids. In this study, a hermetically insulated and temperature-controlled electrochemical cell was built, using commercial petrodiesel B10 as an electrolyte and electrodes for capturing the noise data proposed in stainless steel AISI 304 (marine type). After collecting the experimental data, it could be verified that the electrochemical noise technique, together with the proposed data processing methodologies, is feasible when evaluating the modification tendency of the corrosive process and its intensity in a material during its exposure to the corrosive medium.
Keywords
Biofuel, biodiesel, corrosion, corrosion monitoring, electrochemical noise technique
