Journal of Sol-Gel Science and Technology

, Volume 81, Issue 2, pp 405–412 | Cite as

DBTL as neutral catalyst on TEOS/PDMS anticorrosive coating

  • Carmen Salazar Hernández
  • Mercedes Salazar Hernández
  • Raúl Carrera Cerritos
  • Enrique Elorza
  • Juan Manuel Mendoza-Miranda
  • Ricardo Navarro
Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
  • 237 Downloads

Abstract

Dibutil-dilaurate tin was proposed as a neutral poly-condensation catalyst for the formation of organically modified ceramics between the TEOS and poly-di-methyl-di-siloxane, which was named organic modified silane-dibutil-dilaurate tin. The properties of this material were comparison with an organic modified silane synthetized under similar condition but with acid catalyst. Infrared spectroscopy and NMR 29Si indicated the chemical bonding between the polymer and the silica fragments formed by the TEOS, when dibutil-dilaurate tin was used as catalyst. Also, organic modified silanes were applied on an aluminum surface (Al-6061) as an anticorrosive coating; SEM showed that organic modified silane-dibutil-dilaurate tin coating was deposited homogeneously on the metal substrate; while organic modified silane-acid form a heterogeneous film. Anticorrosive behavior was assessed by gravimetric corrosive tests and it was compared with a commercial polymer film. The results showed an excessive wear on the metal surface by means of intra-grain corrosion; the corrosion rate was determined as: organic modified silane-dibutil-dilaurate tin < organic modified silane-acid< polymer coating < aluminum surface.

Graphical Abstract

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Keywords

TEOS PDMS DBTL Anticorrosive coating Intra-grain corrosion 

Notes

Acknowledgements

The authors wish to acknowledge the financial support of the CONACyT through grant CB-186327/2012 register as SIP-2013-Re/099, as well as to Ernan Hernández Cantero for her technical support in this work.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Carmen Salazar Hernández
    • 1
  • Mercedes Salazar Hernández
    • 2
  • Raúl Carrera Cerritos
    • 1
  • Enrique Elorza
    • 2
  • Juan Manuel Mendoza-Miranda
    • 1
  • Ricardo Navarro
    • 3
  1. 1.Unidad Profesional Interdisciplinaria de Ingeniería Campus GuanajuatoInstituto Politécnico NacionalSilao de la VictoriaMexico
  2. 2.Departamento en Ingeniería en Minas, Metalurgia y GeologíaUniversidad de GuanajuatoGuanajuato, GtoMexico
  3. 3.División de Ciencias Naturales y ExactasUniversidad de GuanajuatoGuanajuato, GtoMexico

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