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Rem: Revista Escola de Minas

Print version ISSN 0370-4467

Abstract

GALLINA, André Lazarin; STROPARO, Erivelton César; CUNHA, Maico Taras da  and  RODRIGUES, Paulo Rogério Pinto. The corrosion of austenitic 304 stainless steel in biodiesel. Rem: Rev. Esc. Minas [online]. 2010, vol.63, n.1, pp.71-75. ISSN 0370-4467.  http://dx.doi.org/10.1590/S0370-44672010000100012.

Fuel distribution uses 304 stainless steel containers for the storage of biofuels, however, there are few reports in the literature about the corrosive aspects this steel in biodiesel. The objective of this research is to study the corrosive behavior of 304 austenitic stainless steel in the presence of biodiesel, unwashed and washed, with aqueous solutions of citric, oxalic, acetic and ascorbic acids 0,01 mol L-1, and compare with results obtained for the copper (ASTM D130). The employedtechniques were: atomic absorption spectrometry (AAS) and optical microscopy (OM). The results of EAA showed a low rate of corrosion for the stainless steel, the alloys elements studied were Cr, Ni and Fe, the highest rate was observed for the chrome, 1.78 ppm / day in biodiesel with or without washing. The OM of the 304 steel, when compared with that of copper, has a low corrosion rate in the 304 steel/biodiesel system. Not with standing, this demonstrates that not only the 304 steel, but also the copper, corrodes in biodiesel.

Keywords : Corrosion; biodiesel; stainless steel.

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