Artículo
Tara Tannins as a Green Sustainable Corrosion Inhibitor for Aluminum
Fecha de publicación:
04/2021
Editorial:
Springer
Revista:
Journal of Materials Engineering and Performance
ISSN:
1059-9495
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Tara tannin is studied as an inhibitor of aluminum corrosion, immersed in an aerated and near-neutral NaCl solution and in a wash-primer formulation. Electrochemical tests prove that tara tannins provide good corrosion resistance for aluminum, and scanning electron microscopy coupled to energy dispersive x-ray spectroscopy shows a low formation of corrosion products, absence of Cl and presence of C. These results indicate that tannins act as a mixed-type inhibitor without changing the mechanism of oxygen or aluminum reactions, and that tannin is adsorbed on aluminum surfaces forming a compact hydrophobic barrier that blocks anodic and cathodic areas. A tara tannin primer was formulated and applied on aluminum. Its anticorrosive properties were studied by electrochemical techniques and humidity chamber testing, in which it exhibited an acceptable performance compared with a zinc tetroxychromate primer. Taking into account their less harmful environmental impact, tara tannins are proposed as an alternative to chromates in the formulation of wash-primers.
Palabras clave:
ALUMINUM
,
CORROSION
,
GREEN ANTICORROSIVE PIGMENT
,
TANNINS
,
TARA
,
WASH-PRIMER
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CIDEPINT)
Articulos de CENTRO DE INV EN TECNOLOGIA DE PINTURAS (I)
Articulos de CENTRO DE INV EN TECNOLOGIA DE PINTURAS (I)
Citación
Byrne, Christian Eduardo; D'alessandro, Oriana; Deya, Marta Cecilia; Tara Tannins as a Green Sustainable Corrosion Inhibitor for Aluminum; Springer; Journal of Materials Engineering and Performance; 31; 4; 4-2021; 2918-2933
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