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

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

© 2016, Springer Science+Business Media New York. 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: [InlineMediaObject not available: see fulltext.]
Original languageAmerican English
Pages (from-to)405-412
Number of pages363
JournalJournal of Sol-Gel Science and Technology
DOIs
StatePublished - 1 Feb 2017

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