2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 8. Composite, Ceramic, Nanomaterials and Mathematics
| Editors: | F. Kongoli, M. de Campos |
| Publisher: | Flogen Star OUTREACH |
| Publication date: | 23 December 2018 |
| Pages: | 184 pages |
| ISBN: | 978-1-987820-96-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Application of Hybrid Zinc Coatings for Improved Corrosion Resistance
Nikolai Boshkov1; Kamelia Kamburova1; Neli Boshkova1; Tsetska Radeva1;1INSTITUTE OF PHYSICAL CHEMISTRY, BULGARIAN ACADEMY OF SCIENCES, Sofia, Bulgaria;
Type of Paper: Regular
Id Paper: 92
Topic: 18
Abstract:
Aiming at the realization of improved corrosion resistance against local corrosion damages, zinc hybrid coatings are obtained and characterized. They are electrodeposited on low carbon steel substrates, and contain embedded polymeric core-shell nanocontainers (NCs) with corrosion inhibitor benzotriazole (BTA). Rod-like hematite cores are coated by alternate adsorption of poly(diallyldimethylammonium chloride) (PDADMAC) and poly(acrylic acid) (PAA) using layer-by-layer assembly technique. Benzotriazole is entrapped in NCs in an assembly step, and the NCs are incorporated into the metal coating matrix via electrodeposition process [1-3].
The protective characteristics of the hybrid coatings in a model medium of 5% NaCl solution are analyzed by means of potentiodynamic polarization curves (PDP), polarization resistance (Rp) measurements, and electrochemical impedance spectroscopy (EIS) for definite periods of time. XPS method is applied to type the newly appeared products after corrosion treatment, and XRD investigations present the structural peculiarities of the hybrid coatings. The latter demonstrate enhanced corrosion resistance in neutral corrosion medium compared to ordinary zinc coatings.
Keywords:
Coatings; Composites; Core-Shell; Nanotechnology; Polymer;References:
[1] Kamburova K., Boshkova N., Boshkov N., Radeva Ts., "Design of polymeric core-shell nanocontainers impregnated with benzotriazole for active corrosion protection of galvanized steel", Colloids and Surfaces A: Physicochemical and Engineering Aspects Colloids and Surfaces A: Physicochem. Eng. Aspects 499, 24-30, 2016.[2] Kamburova K., Boshkova N., Boshkov N., Radeva Ts., "Smart core-shell nanocontainers with kaolinite for improved corrosion protection of zinc coating on steel", FLOGEN 2017 Sustainable Industrial Processing Summit and Exhibition, Vol. 8 Surfaces and Interfaces, Composite, Ceramic and Nanomaterials, 163 - 177, Cancun, Mexico. Editors: F. Kongoli, I. Braems, V. Demange, J.M. Dubois, M. Pech-Canul, C.L. Patino, O. Fumio.
[3] Boshkov N., Boshkova N., "Application of PEO75PPO30PEO75 stabilised polymeric micelles for improved corrosion resistance of composite zinc coatings", Transactions of the IMF, 95, 6, 316-320, 2017.