Different epoxy primer coatings for metal substrates were investigated by electrochemical impedance spectroscopy (EIS). The variables were the substrate (cold rolled steel, phosphatised cold rolled steel and phosphatised electrozincated cold rolled steel), the epoxy primer (containing a Pb anticorrosive pigment and non-toxic paint containing Al and Fe oxides) and curing temperature (low temperature 160 deg C and high temperature 180 deg C). The primers showed excellent behaviour when applied on phosphatised steel and very poor electrochemical characteristics on phosphatised electrozincated steel. The non-toxic primer performed better than the Pb coating on phosphatised steel and electrozincated steel while it performed in a similar way to Pb primer on steel. The curing temperature had a big effect on the primer behaviour. The Pb coating performed better when it was cured at a low temperature. The coat adhesion to the substrate was tested by cathodic disbonding. It was found that the primers have very good adhesion to phosphatised steel and poor adhesion to phosphatised electrozincated steel.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The evaluation of anticorrosive automotive epoxy coatings by means of electrochemical impedance spectroscopy


    Additional title:

    Die Untersuchung von korrosionsschützenden Epoxidbeschichtungen für Autos mit elektrochemischer Impedanzspektroskopie


    Contributors:
    Suay, J.J. (author) / Rodriguez, M.T. (author) / Razzaq, K.A. (author) / Carpio, J.J. (author) / Saura, J.J. (author)


    Publication date :

    2003


    Size :

    9 Seiten, 13 Bilder, 2 Tabellen, 19 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Preliminary evaluation of the anticorrosive properties of aircraft coatings by electrochemical methods

    Reynolds, L.B. / Twite, R. / Khobaib, M. et al. | Tema Archive | 1997


    Potential use of graphene composites in epoxy resin as anticorrosive painting in automotive industry

    de Oliveira, Elisa M. N. / Hurtado, Luiz P. / Sormani, Mariana B. et al. | SAE Technical Papers | 2024


    Epoxy Coatings for Automotive Corrosion Protection

    Fristad, William E. | SAE Technical Papers | 2000


    Epoxy Coatings for Automotive Corrosion Protection

    Fristad, W. E. / Society of Automotive Engineers | British Library Conference Proceedings | 2000


    Epoxy coatings for automotive corrosion protection

    Fristad,W.E. / Henkel Surface Technologies,DE | Automotive engineering | 2000