PMID- 28772667
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240326
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 10
IP  - 3
DP  - 2017 Mar 17
TI  - Hybrid Coatings Enriched with Tetraethoxysilane for Corrosion Mitigation of 
      Hot-Dip Galvanized Steel in Chloride Contaminated Simulated Concrete Pore 
      Solutions.
LID - 10.3390/ma10030306 [doi]
LID - 306
AB  - Hybrid sol-gel coatings, named U(X):TEOS, based on ureasilicate matrices (U(X)) 
      enriched with tetraethoxysilane (TEOS), were synthesized. The influence of TEOS 
      addition was studied on both the structure of the hybrid sol-gel films as well as 
      on the electrochemical properties. The effect of TEOS on the structure of the 
      hybrid sol-gel films was investigated by solid state Nuclear Magnetic Resonance. 
      The dielectric properties of the different materials were investigated by 
      electrochemical impedance spectroscopy. The corrosion behavior of the hybrid 
      coatings on HDGS was studied in chloride-contaminated simulated concrete pore 
      solutions (SCPS) by polarization resistance measurements. The roughness of the 
      HDGS coated with hybrids was also characterized by atomic force microscopy. The 
      structural characterization of the hybrid materials proved the effective reaction 
      between Jeffamine((R)) and 3-isocyanate propyltriethoxysilane (ICPTES) and 
      indicated that the addition of TEOS does not seem to affect the organic structure 
      or to increase the degree of condensation of the hybrid materials. Despite the 
      apparent lack of influence on the hybrids architecture, the polarization 
      resistance measurements confirmed that TEOS addition improves the corrosion 
      resistance of the hybrid coatings (U(X):TEOS) in chloride-contaminated SCPS when 
      compared to samples prepared without any TEOS (U(X)). This behavior could be 
      related to the decrease in roughness of the hybrid coatings (due TEOS addition) 
      and to the different metal coating interaction resulting from the increase of the 
      inorganic component in the hybrid matrix.
FAU - Figueira, Rita B
AU  - Figueira RB
AD  - LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, Lisboa 
      1700-066, Portugal. rita@figueira.pt.
FAU - Callone, Emanuela
AU  - Callone E
AD  - "Klaus Muller" NMR Laboratory, Department of Industrial Engineering, University 
      of Trento, Via Sommarive, 9, Trento 38123, Italy. emanuela.callone@unitn.it.
FAU - Silva, Carlos J R
AU  - Silva CJR
AD  - Centro de Quimica, University of Minho, Campus de Gualtar, Braga 4710-057, 
      Portugal. csilva@quimica.uminho.pt.
FAU - Pereira, Elsa V
AU  - Pereira EV
AD  - LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, Lisboa 
      1700-066, Portugal. epereira@lnec.pt.
FAU - Dire, Sandra
AU  - Dire S
AD  - "Klaus Muller" NMR Laboratory, Department of Industrial Engineering, University 
      of Trento, Via Sommarive, 9, Trento 38123, Italy. sandra.dire@unitn.it.
LA  - eng
PT  - Journal Article
DEP - 20170317
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC5503348
OTO - NOTNLM
OT  - alkaline environment
OT  - chlorides
OT  - coatings
OT  - corrosion mitigation
OT  - hybrids
OT  - sol-gel
COIS- The authors declare no conflict of interest.
EDAT- 2017/08/05 06:00
MHDA- 2017/08/05 06:01
PMCR- 2017/03/17
CRDT- 2017/08/05 06:00
PHST- 2017/01/26 00:00 [received]
PHST- 2017/03/08 00:00 [revised]
PHST- 2017/03/14 00:00 [accepted]
PHST- 2017/08/05 06:00 [entrez]
PHST- 2017/08/05 06:00 [pubmed]
PHST- 2017/08/05 06:01 [medline]
PHST- 2017/03/17 00:00 [pmc-release]
AID - ma10030306 [pii]
AID - materials-10-00306 [pii]
AID - 10.3390/ma10030306 [doi]
PST - epublish
SO  - Materials (Basel). 2017 Mar 17;10(3):306. doi: 10.3390/ma10030306.