ELECTROCHEMICAL AND MECHANICAL BEHAVIOR OF UV CURING PAINT ON HYBRID FILMS MODIFIED WITH POLYETHYLENEGLYCOL PLASTICIZER APPLIED ON TINPLATE
Marcolin, Patrícia; Beltrami, Lilian Vanessa Rossa; Boniatti, Rosiana; Salvador, Débora Guerra; Quevedo, Marcela Citlalim; Bastos, Antonio Alexandre Cunha; Ferreira, Mário Guerreiro Silva; Malfatti, Célia de Fraga; Kunst, Sandra Raquel
Abstract
The objective of this work is to coat tinplate with a hybrid film obtained from a sol-gel process constituted by the alkoxide precursor tetraethoxysilane (TEOS) and 3-trimethoxysilylpropyl methacrylate (TMSM), with the addition of cerium nitrate (0.01 M) and polyethyleneglycol plasticizer (20 g.L-1) to the sol formulation. The films were obtained by dip-coating, applying one and two layers and curing them at different temperatures (60°C and 90°C) for 20 minutes, and adhering UV curing paint to each film respectively. The results showed that the double layered hybrid film obtained at 60°C had a higher layer of thickness and the best performance in the electrochemical assays, in other words, higher resistance to corrosion. Furthermore, in studies following the application of UV coating, the hybrid-film monolayer cured at 60°C wich had an organic coating of cured UV applied to it, achieved a performance similar to that of the pretreated alkyd greenhouse currently used in the metal packaging industry
Keywords
Referências
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