MECHANICAL PROPERTIES AND CORROSION PROTECTION OF CARBON STEEL COATED WITH AN EPOXY BASED POWDER COATING CONTAINING MONTMORILONITE FUNCTIONALIZED WITH SILANE

• Published in: Tecnologia em metalurgia, materiais e mineração Vol. 11; no. 2; pp. 180 - 186
• Main Authors: Bertuoli, Paula Tibola, Frizzo, Veronica Perozzo, Piazza, Diego, Scienza, Lisete Cristine, Zattera, Ademir Jose
• Format: Journal Article
• Language: English
• Published: Associação Brasileira de Metalurgia, Materiais e Mineração 01-06-2014
• Subjects: Carbon steels; Clay (material); Low carbon steels; Mechanical properties; Mechanical property; Corrosion; Montmorillonite; Powder coating; Paints; Powder coating; Protective coatings; Sprays
• ISSN: 2176-1515; 2176-1523
• DOI: 10.4322/tmm.2014.026

In the present work the MMT-Na+ clay was functionalized with 3-aminopropyltriethoxysilane ( gamma -APS) and incorporated in a commercial formulation epoxy-based powder coating in a proportion of 8 wt% and applied on 1008 carbon steel panels by electrostatic spray. Adhesion, flexibility, impact and corrosion performance in salt spray chamber tests were performed to evaluate the coatings. The presence of clay did not affect the mechanical properties of the film, however greater subcutaneous migration was assessed after the completion of salt spray testing, which can compromise the use of paints obtained as primers.Original Abstract: No presente trabalho a argila montmorilonita sodica (MMT-Na+) foi funcionalizada com 3-aminopropiltrietoxisilano ([gamma]-APS) e incorporada em uma formulacao comercial de tinta em po base epoxi na proporcao de 8% em massa e aplicada em paineis de aco carbono 1008 por pulverizacao eletrostatica. Foram realizados ensaios de aderencia, flexibilidade, impacto e desempenho a corrosao em nevoa salina. A presenca da argila nao afetou as propriedades mecanicas do filme, contudo uma maior migracao subcutanea foi verificada apos a realizacao do ensaio de nevoa salina, o que pode comprometer a utilizacao das tintas obtidas como revestimento protetor.