Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/tmm.2014.026
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

CARACTERIZAÇÃO MECÂNICA E DE PROTEÇÃO À CORROSÃO DO AÇO CARBONO REVESTIDO COM TINTA EM PÓ BASE EPOXI CONTENDO MONTMORILONITA FUNCIONALIZADA COM SILANO

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

Bertuoli, Paula Tibola; Frizzo, Veronica Perozzo; Piazza, Diego; Scienza, Lisete Cristine; Zattera, Ademir José

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Resumo

No presente trabalho a argila montmorilonita sódica (MMT-Na+) foi funcionalizada com 3-aminopropiltrietóxisilano (γ-APS) e incorporada em uma formulação comercial de tinta em pó base epóxi na proporção de 8% em massa e aplicada em painéis de aço carbono 1008 por pulverização eletrostática. Foram realizados ensaios de aderência, flexibilidade, impacto e desempenho à corrosão em névoa salina. A presença da argila não afetou as propriedades mecânicas do filme, contudo uma maior migração subcutânea foi verificada após a realização do ensaio de névoa salina, o que pode comprometer a utilização das tintas obtidas como revestimento protetor.

Palavras-chave

Propriedade mecânica, Corrosão, Montmorilonita, Tinta em pó.

Abstract

In the present work the MMT-Na+ clay was functionalized with 3-aminopropyltriethoxysilane (γ-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.

Keywords

Mechanical property, Corrosion, Montmorillonite, Powder coating.

Referências



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