For metallic tanks in contact with aqueous solution, it is always observed the presence of electrochemical corrosion. This process can cause both economic and environmental damage. In the automotive industry, fuel tanks systems have been studied in order to propose new materials to replace the plastic tanks or tanks with metallic coatings. Plastic tanks have the disadvantage of not being recyclable. In the other hand, for metallic coated tanks, tin is used as a coat material and, for this reason, the external tank side must be painted, making its productive process more expensive and generating higher amount of waste. Nowadays, organic-metallic coated tanks, in which, nickel and aluminum are the metals present, can be found. These coatings show potential application; because they do not use heavy metals in their composition and they do not require external painting, allowing a lower production cost. In this work, the electrochemical behavior of EEP mild steel, both coated with organic-metallic compound and without coat, when in contact fuel hydrated ethylic alcohol, was evaluated. The evaluation was carried out using electrochemical impedance spectroscopy technique. Steel substrate in contact with alcohol system was associated with an electric circuit with solution resistance in series with the interfacial resistance and in parallel with non ideal capacitance of the electric double layer. The polarization resistance value for this system was 132.7 kOhm. On the other hand, polarization resistance value for the organic-metallic coating system in contact with alcohol was 2.37 MOhm. This shows that, organic-metallic coated steel system is approximately 18 times more resistant to polarization, in fuel hydrated ethylic alcohol solution, than non coated steel. This is a promising result, once these coatings presented good ability to protect steel substrates against corrosion, and they can be an environmental safe alternative for automotive tanks production.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Corrosion Resistance of Automotive Ecological Fuel Tanks in Contact With Hydrated Ethanol Fuel


    Additional title:

    Sae Technical Papers



    Conference:

    21st SAE Brasil International Congress and Exhibition ; 2012



    Publication date :

    2012-10-02




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    corrosion resistance of automotive ecological fuel tanks in contact with hydrated ethanol fuel

    Luciano, M.A. / De Freitas Cunha Lins, V. / De Castro, M.D.M.R. et al. | British Library Conference Proceedings | 2012



    Corrosion of stainless steel AISI-440C in hydrated ethanol fuel

    Aguiar,A. / Alarcon,O.Q. / Teschke,O. et al. | Automotive engineering | 1988


    Corrosion of Fuel Tanks

    Emerald Group Publishing | 1941


    Fuel tanks for the automotive industry

    Corrodi,R. / Gordon,H. / Soundronic Neftenbach,DE et al. | Automotive engineering | 1993