Study of chromate-free pretreatments and primers for the protection of galvanised steel sheets
1998; Elsevier BV; Volume: 33; Issue: 2 Linguagem: Inglês
10.1016/s0300-9440(98)00046-0
ISSN1873-331X
AutoresAntonio Barbucci, M. Delucchi, G. Cerisola,
Tópico(s)Corrosion Behavior and Inhibition
ResumoEnvironmental problems in the coil-coating industry have caused a trend towards non-polluting pretreatment/primer combinations. In this work some environmentally-friendly systems have been studied. Impedance spectroscopy on deformed (T-bent) and damaged samples has been used as a tool to obtain a selective evaluation of the best systems. Nitro-cobalt chemical conversion, with fluo-zirconate passivation coated by an epoxy-polyurethane primer having ionic exchange active pigments, gave the best solution for the systems studied.
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