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Información tecnológica

versión On-line ISSN 0718-0764


KUNST, Sandra R; MATOS, José F; KORB, Matias A  y  MALFATTI, Célia F. Obtention and Characterization of Silane based Films for the Protection of Galvanized Steel. Inf. tecnol. [online]. 2011, vol.22, n.5, pp. 67-76. ISSN 0718-0764.

This work presents a study on the behavior of silane films Gamma-Aminopropyl triethoxysilane and N-(beta-aminoethyl)-gamma-Aminopropyl trimethoxysilane, obtained by dip-coating process on galvanized steel. The films were cured by thermal and ultraviolet irradiation cure processes. The substrates and zinc-based coatings are usually employed as surface treatment to improve the corrosion resistance but they employ hexavalent chromium that has a high degree of toxicity. Polymer films containing organofunctional silanes have been studied as an alternative to the passivation of zinc-based substrates. The silane coatings were evaluated by electrochemical tests and contact angle. The film morphology was characterized by scanning electron microscopy. The results showed that the films obtained presented a homogeneous coverage and that the influence of silane employed in the formulation was evident, as well as the cure parameters.

Palabras clave : galvanized steel; silane; corrosion; ultraviolet irradiation cure.

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