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| Format: | Artículo científico |
| Language: | en |
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Sociedad Química de México
2008
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| Online Access: | https://www.redalyc.org/articulo.oa?id=47512076002 |
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Table of Contents:
- Morphology and Corrosion Performance of Chromate Conversion Coatings on Different Substrates Miguel Antonio Domínguez-Crespo Edgar Onofre-Bustamante Aidé Minerva Torres-Huerta Francisco J. Rodríguez-Gómez Multidisciplinaria (Ciencias Naturales y Exactas) CCCs adhesion fe alloys textural properties The aqueous corrosion resistances of galvalume (Fe-Al+Zn) and steel galvanized (Fe-Zn) alloys, passivated by immersion in chromating solution with different immersion times (0, 10, 30 y 60 s) are compared. The electrochemical behaviour of various chromated and non-chromated coatings was investigated in 3 wt-% NaCl solution using polarization techniques. For comparison, AISI 1010carbon steel substrates were also analyzed. The characterization measurements and polarization curves revealed that textural properties of Fe alloys influence the growth of the films and both the cathodic and anodic reactions. An optimum anticorrosive protection was obtained at 30 s. CCCs treatments inhibited the corrosion of zinc to a significant degree, but less effectively than coatings formed with aluminium- zinc alloys. The difference in the corrosion protection given by the two substrates types was attributed to the structural properties, thickness coating, grain size and roughness observed, which affect oxygen diffusion. 2008 artículo científico 1870-249X https://www.redalyc.org/articulo.oa?id=47512076002 en http://www.redalyc.org/revista.oa?id=475 Journal of the Mexican Chemical Society application/pdf Sociedad Química de México Journal of the Mexican Chemical Society (México) Num.4 Vol.52