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Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress

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Abstract

This paper is a review of the most recent and relevant achievements (from 2001 to 2013) on the development of organic–inorganic hybrid (OIH) coatings produced by sol–gel-derived methods to improve resistance to oxidation/corrosion of different metallic substrates and their alloys. This review is focused on the research of OIH coatings based on siloxanes using the sol–gel process conducted at an academic level and aims to summarize the materials developed and identify perspectives for further research. The fundamentals of sol–gel are described, including OIH classification, the interaction with the substrate, their advantages, and limitations. The main precursors used in the synthesis of OIH sol–gel coatings for corrosion protection are also discussed, according to the metallic substrate used. Finally, a multilayer system to improve the resistance to corrosion is proposed, based on OIH coatings produced by the sol–gel process, and the future research challenges are debated.

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Abbreviations

AEA:

Aliphatic epoxy acrylate

Al(OsBu)3 :

Aluminum tri-sec-butoxide

BTAH:

1,2,3-Benzotriazole

BTMS:

n-Butyltrimethoxysilane

CCCs:

Chemical conversion coatings

DETA:

Diethylenetriamine

DGEBA:

Poly(bisphenol A-co-epichlorohydrin)

DMTMS:

Dimethyltrimethoxysilane

ECO:

Epoxidized castor oil

EGDMA:

Ethyleneglycoldimethacrylate

ER:

Epoxy resin

ERE:

Epoxy-resin–ester

GMA:

Glycidylmethacrylate

HDGS:

Hot-dip galvanized steel

HEMA:

2-Hydroxyethylmethacrylate

HMDIC:

Hexamethylene diisocyanate

HMDS:

Hexamethyldisilozane

HEPA:

2,2′-Bis(4-β-hydroxy ethoxy) phenyl propane

HTMS:

n-Hexyltrimethoxysilane

IBTMS:

Isobutyltrimethoxysilane

IOTMS:

Isooctyltrimethoxysilane

IPDIC:

Isophorone diisocyanate

LDF:

Linseed diol fattyamide

MAEP:

2-Methacryloyloxyethylphosphate

MAPTES:

3-Methacryloxy propyl triethoxysilane

MMA:

Methylmethacrylate

n-PTMS:

n-Propyl trimethoxysilane

OIH:

Organic–inorganic hybrid

OTES:

Octyltriethoxysilane

OTMS:

Octyltrimethoxysilane

PAPTES:

N-Phenyl-3-aminopropyltriethoxysilane

PDMSU:

Bis[(ureapropyl)triethoxysilane]bis(propyl)-terminated-polydimethylsiloxane 1000

PDMMS:

Polidymetilmetoxysilane

PFOTES:

1H,1H,2H,2H-Per-fluorooctyltriethoxysilane

PR:

Polyester resin

SiO2-NP:

Silica nanoparticles

SNAP:

Self-assembled nanophase particle

TBADP:

Titanium(IV)-bis(acac)diisopropoxide

TDIC:

Toluene diisocyanate

TEPA:

Tetraethylenepentamine

TETA:

Triethylenetetramine

TIBMS:

Triisobutoxy(methyl)silane

TIPMS:

Triisopropoxy(methyl)silane

TMCS:

Trimethylchlorosilane

TMSPh:

Tris-(trimethylsilyl)phosphate

ZrBTO:

Zirconium(IV) butoxide

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Acknowledgments

The authors would like to gratefully acknowledge the financial support from Fundação para a Ciência e Tecnologia (FCT) for the PhD grant SFRH/BD/62601/2009, the financial support by Centro de Química [project F-COMP-01-01024-FEDER-022716 (ref. Pest-C/Qui/UI0686/2011)-FEDER-COMPETE] and EU COST action MP1202: HINT - Rational design of hybrid organic-inorganic interfaces: the next step towards functional materials.

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  1. Laboratório Nacional de Engenharia Civil (LNEC), Av. Brasil 101, 1700-066, Lisbon, Portugal

    R. B. Figueira & E. V. Pereira

  2. Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    R. B. Figueira & C. J. R. Silva

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Figueira, R.B., Silva, C.J.R. & Pereira, E.V. Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress. J Coat Technol Res 12, 1–35 (2015). https://doi.org/10.1007/s11998-014-9595-6

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