Corrosion behavior of metallic materials in chicken fat-based biodiesel

Abstract

The corrosion behaviour of 304 type stainless steel, 1018 carbon steel pure Al and Cu in a chicken fat-based biodiesel during 180 days has been studied by using electrochemical impedance spectroscopy and electrochemical noise measurements. Cu and carbon steel had the highest corrosion rate. Both Al and 304 type stainless exhibited a localised, whereas Cu and carbon steel a mixed type of corrosion. Corrosion process was under charge transfer control for short exposure times, but under adsorption/desorption control for longer exposure times. The corrosiveness of the biodiesel resulted from a degradation in its physicochemical properties.