Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/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

Downloads: 1
Views: 1001

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



1. Bagherzadeh MR, Mousavinejad T. Preparation and investigation of anticorrosion properties of the water-based epoxy-clay nanocoating modified by Na+-MMT and Cloisite 30B. Prog Org Coat. 2012;74:589-595. http://dx.doi. org/10.1016/j.porgcoat.2012.02.006

2. Shi X, Nguyen TA, Suo Z, Liu Y, Avci R. Effect of nanoparticles on the anticorrosion and mechanical properties of epoxy coating. Surf Coat Technol. 2009;204:237-245. http://dx.doi.org/10.1016/j.surfcoat.2009.06.048

3. Piazza D, Lorandi NP, Pasqual CI, Scienza LC, Zattera AJ. Influence of a microcomposite and a nanocomposite on the properties of an epoxy-based powder coating. Mater Sci Eng, A Struct Mater: Prop Microstruct Process. 2011;528(22-23):6769-6775. http://dx.doi.org/10.1016/j.msea.2011.05.062

4. Begherzadeh MR, Mahdavi F. Preparation of epoxy-clay nanocomposite and investigation on its anti-corrosive behavior in epoxy coating. Prog Org Coat. 2007;60:117-120. http://dx.doi.org/10.1016/j.porgcoat.2007.07.011

5. Hang TTX, Truc TA, Nam TH, Oanh VK, Jorcin JB, Pébère N. Corrosion protection of carbon steel by na epoxy resin containing organically modified Clay. Surf Coat Technol. 2007;201:7408-7415. http://dx.doi.org/10.1016/j. surfcoat.2007.02.009

6. Huttunen-Saarivita E, Vaganov GV, Yudin VE, Vuorinen J. Characterization and corrosion protection properties of epoxy powder coatings containing nanoclays. Prog Org Coat. 2013;76:757-767. http://dx.doi.org/10.1016/j. porgcoat.2013.01.005

7. Paiva LB, Morales A R, Diaz FRV. Argilas organofílicas: características, metodologias de preparação, compostos de intercalação e técnicas de caracterização. Cerâmica. 2008;54:213-226. http://dx.doi.org/10.1590/S0366- 69132008000200012.

8. Alexandre M, Dubois P. Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materials. Mater Sci Eng R, Rep. 2000;28:1-63. http://dx.doi.org/10.1016/S0927-796X(00)00012-7

9. Paul DR, Robeson LM. Polymer nanotechnology: nanocomposites. Polymer. 2008;49:3187-3204. http://dx.doi. org/10.1016/j.polymer.2008.04.017

10. Lee SM, Tiwari D. Organo and inorgano-organo-modified clays in the remediation of aqueous solutions: an overview. Appl Clay sci. 2012;59-60:84-102. http://dx.doi.org/10.1016/j.clay.2012.02.006

11. Xie W, Xie R, Pan WP, Hunter D, Koene B, Tan LS, et al. Thermal stability of quaternary phosphonium modified montmorillonite. Chem Mater. 2002;14(11):4837-4845. http://dx.doi.org/10.1021/cm020705v

12. He H, Duchet J, Galy J, Gerard J-F. Grafting of swelling clay materials with 3-aminopropyltriethoxysilane. J Colloid Interface Sci. 2005;288:171-176. PMid:15927576. http://dx.doi.org/10.1016/j.jcis.2005.02.092

13. Piscitelli F, Posocco P, Toth R, Fermeglia M, Pricl S, Mensitieri G, et al. Sodium montmorillonite silylation: Unexpected effect of the aminosilane chain length. J Colloid Interface Sci. 2010;351:108-115. PMid:20719329. http://dx.doi.org/10.1016/j.jcis.2010.07.059

14. Shanmugharaj AM, Rhee KY, Ryu SH. Influence of dispersing medium on grafting of aminopropyltriethoxysilane in swelling clay materials. J Colloid Interface Sci. 2006;298: 854-859. PMid:16427648. http://dx.doi.org/10.1016/j. jcis.2005.12.049

15. Shen W, He H, Zhu J, Yuan P, Frost RL. Grafting of montmorillonite with different functional silanes via two different reaction systems. J Colloid Interface Sci. 2007;313:268-273. PMid:17512531. http://dx.doi.org/10.1016/j. jcis.2007.04.029

16. Shen W, He H, Zhu J, Yuan P, Ma Y, Liang X. Preparation and characterization or 3-aminopropyltriethosysilane grafted montmorillonite and acid-activated montmorillonite. Chinese Sci Bull. 2009;54:265-271. http://dx.doi. org/10.1007/s11434-008-0361-y

17. Bertuoli PT, Piazza D, Scienza LC, Zattera AJ. Preparation and characterization of montmorillonite modified with 3-amonopropyltriethoxysilane. Appl Clay sci. 2014;87:46-51. http://dx.doi.org/10.1016/j.clay.2013.11.020

18. Demirbas O, Alkan M, Dogan M, Turhan Y, Namli H, Turan T. Electrokinetic and adsorption properties of sepiolite modified by 3-aminopropyltriethoxysilane. J Hazard Mater. 2007;149:650-656. PMid:17532563. http://dx.doi. org/10.1016/j.jhazmat.2007.04.036

19. Xie Y, Hill CAS, Xiao Z, Militz H, Mai C. Silane coupling agents used for natural fiber/polymer composites: a review. Compos Part A. 2010;41:806-819. http://dx.doi.org/10.1016/j.compositesa.2010.03.005

20. American Society for Testing and Materials. ASTM D 3359: Standard test methods for measuring adhesion by tape test. West Conshohocken: ASTM; 2002.

21. American Society for Testing and Materials. ASTM D 522: Standard test methods for mandrel bend test of attached organic coatings. West Conshohocken: ASTM; 2008.

22. American Society for Testing and Materials. ASTM D 2794: Standard test methods for resistance of organic coatings to the effects of rapid deformation (impact). West Conshohocken: ASTM; 2004.

23. American Society for Testing and Materials. ASTM B 117: Standard practice for operating salt spray (fog) apparatus. West Conshohocken: ASTM; 2011.

24. American Society for Testing and Materials. ASTM D 1654: Evaluation of painted or coated specimens subjected to corrosive environments. West Conshohocken: ASTM; 2008.

25. Piazza D. Obtenção e caracterização de nanocompósitos de resina epóxi/montmorilonita (MMT) aplicados em tinta em pó [dissertação de mestrado]. Caxias do Sul: Universidade de Caxias do Sul; 2011.

26. Paiva LB, Morales AR, Guimarães TR. Propriedades mecânicas de nanocompósitos de polipropileno e montmorilonita organofílica. Polímeros. 2006;16:136-140.

27. Lakshmi MS, Narmadha B, Reddy BSR. Enhanced thermal stability and structural characteristics of different MMT-Clay/epoxy-nanocomposite materials. Polym Degrad Stab. 2008;93:201-213. http://dx.doi.org/10.1016/j. polymdegradstab.2007.10.005

28. Choi YY, Lee EH, Ryu SH. Effect of silane funcionalization of montmorillonite on epoxy/montmorillonite nanocomposite. Polym Bull. 2009;63:47-55. http://dx.doi.org/10.1007/s00289-009-0068-5

29. Mafi R, Mirabedini SM, Naderi R, Attar MM. Effect of curing characterization on the corrosion performance of polyester and polyester/epoxy powder coatings. Corros Sci. 2008;50:3280-3286. http://dx.doi.org/10.1016/j. corsci.2008.08.037

30. Gemelli E. Corrosão de Materiais Metálicos e sua Caracterização. Rio de Janeiro: LTC Editora; 2001.
588696ef7f8c9dd9008b477d tmm Articles
Links & Downloads

Tecnol. Metal. Mater. Min.

Share this page
Page Sections