Χαρακτηρισμός πολυμερικών επιστρώσεων με νανοπεριέκτες σε μέταλλα για την προστασία τους από διάβρωση σε θαλάσσιο περιβάλλον

Μπαλάσκας Ανδρόνικος

Unit:

Τομέας ΙΙ [Οργανική Χημεία – Οργανική Χημική Τεχνολογία – Χημεία Τροφίμων]
Library of the School of Science

Deposit date:

2012-10-25

Year:

2012

Author:

Μπαλάσκας Ανδρόνικος

Dissertation committee:

Χατζηχρηστίδης Νικόλαος Ομότ. Καθηγητής Ε.Κ.Π.Α. (επιβλέπων), Κόρδας Γεώργιος Ερευνητής Α΄, Πιτσικάλης Μαρίνος Αναπλ. Καθηγητής Ε.Κ.Π.Α.

Original Title:

Χαρακτηρισμός πολυμερικών επιστρώσεων με νανοπεριέκτες σε μέταλλα για την προστασία τους από διάβρωση σε θαλάσσιο περιβάλλον

Languages:

Greek

Summary:

Organically modified silicate (ORMOSIL) – epoxy coatings were formed on
aluminium alloy 2024-T3 and Hot Dip Galvanized Steel (HDGS) in order to protect
the substrates from corrosion. In order to enhance the anticorrosive properties
of the coatings, organic and inorganic corrosion inhibitors were incorporated
into the polymer matrix cerium molybdate (CeMo), titanium oxide (TiO2)
nanocontainers and organic pH-sensitive containers loaded with
1H-benzotriazole-4-sulfonic acid (1-BSA), 2-mercaptobenzothiazole (MBT) and H2
TiF6.
The ORMOSIL – epoxy coatings were deposited via the dip-coating process. The
morphology of the coatings was examined by Scanning Electron Microscopy (SEM).
Their composition and structure were investigated by Fourier Transform Infrared
Spectroscopy (FT-IR) and Energy Dispersive X-Ray Analysis (EDX).
Electrochemical impedance spectroscopy (EIS), dc polarization and Open Circuit
Potential (OCP) measurements were used in order to evaluate the anticorrosive
properties of the coatings. The results showed coatings with loaded
nanocontainers presented advanced anticorrosive properties comparatively to all
the other coatings exhibiting self-healing properities.
Finally, copper oxide nanospheres (Cu2O) were successfully synthesised and
characterized. The resulted containers are characterized by SEM, TEM and XRD.
Subsequently, the nanospheres were loaded with biocides and were incorporated
into epoxy coatings and commercial coatings and their action as antifouling
agents was studied. The results showed that coatings with loaded Cu2O
nanospheres had better antifouling effect than commercial coatings with
biocides after exposure in marine environment.

Keywords:

Hybrid coatings, Nanocontainers, Self-healing, EIS, Corrosion

Index:

Yes

Number of index pages:

13-25

Contains images:

Number of references:

116

Number of pages:

224

File: