Effects of nano silica on the Anticorrosive properties of epoxy coatings

Journal: Vol.6, No.2, Spring 2013 - Article 6   Pages :   Until 

Article Code:

Zahra Ranjbar: Institute for Color Science and Technology - Surface Coating and Corrosion Department
Sh. Ashhari: Institute for Color Science and Technology - Surface Coating and Corrosion Department
Ali Jannesari: Institute for Color Science and Technology - Surface Coating and Corrosion Department
Sh. Montazeri: Institute for Color Science and Technology - Surface Coating and Corrosion Department

Article's abstract:

In this study a series of epoxy/silica nanocomposites were prepared by using nano silica particles which had different surface modifications. The morphology of the nanocomposite coatings was characterized by scanning electron microscopy SEM. The effects of the hydrophilic and hydrophobic feature of the nano particles on the Tg and anticorrosive properties of nanocomposite coatings were evaluated by DSC and EIS instruments. It was observed that the presence of the hydrophobic nano silica particles affected the curing and cross linking density of the organic coatings and consequently reduction in corrosion resistance of nanocomposite coatings. On the other hand hydrophilic nano composites coatings showed better corrosion resistance even after 60 day immersion in NaCl3.5 solution in comparison to pure epoxy coating

nanosilica, epoxy, corrosion, EIS

1. R. Selvaraj, M. Selvaraj, S. V. K. Iyer, R. Selvaraj, M. Selvaraj, S. V. K. Iyer, Studies on the evaluation of the performance of organic coatings used for the prevention of corrosion of steel rebars in concrete structures, Prog. Org. Coat., 64(2009), 454-459.#2. A. Kalendová, D. Veselý, J. Stejskal, Organic coatings containing polyaniline and inorganic pigments as corrosion inhibitors, Prog. Org. Coat., 62(2008), 105-116.#3. G. Grundmeier, W. Schmidt, M. Stratmann, Corrosion protection by organic coatings: electrochemical mechanism and novel methods of investigation, Electrochim. Acta, 45(2000), 2515-2533.#4. L. Jianguo, G. Gaoping, Y. Chuanwei, EIS study of corrosion behavior of organic coating/ Dacromet composite systems, Electrochim. Acta, 50(2005), 3320-3332.#5. J. Ou, J. Wang, J. Zhou, Sh. Liu, Y. Yu, X. Pang, Sh. Yang, Construction and study on corrosion protective property of polydopamine-based 3-layer organic coatings on aluminum substrate, Prog. Org. Coat., 68(2010), 244-247.#6. Z. Ranjbar, S. Montazeri, M. Jalili, Optimization of a Waterborne Epoxy Coatings Formulation via Experimental Design, Prog. Color Colorants Coat., 2(2009), 23-33.#7. B. Nikravesh, B. Ramezanzadeh, A. A. Sarabi, S. M. Kasiriha, Evaluation of the corrosion resistance of an epoxy-polyamide coating containing different ratios of micaceous iron oxide/Al pigments, Corros. Sci., 53 (2011), 1592-1603.#8. S. González, I. C. Mirza Rosca, R. M. Souto, Investigation of the corrosion resistance characteristics of pigments in alkyd coatings on steel, Prog. Org. Coat., 43(2001), 282-285.#9. Sh. K. Dhoke, A. S. Khanna, Effect of nano-Fe2O3 particles on the corrosion behavior of alkyd based waterborne coatings, Corros. Sci., 51(2009), 6-20.#10. M. Rashvand, Z. Ranjbar, S. Rastegar, Nano zinc oxide as a UV-stabilizer for aromatic polyurethane coatings, Prog. Org. Coat., 71(2011), 362-368.#11. M. Rashvand, Z. Ranjbar, S. Rastegar, Preserving anti-corrosion properties of epoxy based coatings simultaneously exposed to humidity and UV-radiation using nano zinc oxide, J. Electrochem. Soc., 159(2012), C129-C132.#12. Sh. Ashhari, A. A. Sarabi, S. M. Kasiriha, D. Zaarei, Aliphatic polyurethane-montmorillonite nanocomposite coatings: preparation, characterization, and anticorrosive properties, J. Appl. Polym. Sci., 119(2011), 523-529.#13. X. Zhang, F. Wang, Y. Du, Effect of nano-sized titanium powder addition on corrosion performance of epoxy coatings, Surf. Coat. Technol., 201(2007), 7241-7245.#14. R. Zandi-Zand, A. Ershad-Langroudi, A. Rahimi, Silica based organic–inorganic hybrid nanocomposite coatings for corrosion protection, Prog. Org. Coat., 53(2005), 286-291.#15. H. B. Lu, Y. Hu, M. H. Gu, S. C. Tang, H. M. Lu, X. K. Meng, Synthesis and characterization of silica–acrylic–epoxy hybrid coatings on 430 stainless steel, Surf. Coat. Technol., 204(2009), 91-98.

Article's file
Page view: 3068
Article's download quantity : 609

Article System Login

Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
ISSN (online):
Institute for Color Science and Technology (ICST)

Quick Access
What is your opinion about the manuscript subscription system of PCCC website?
Website Statistics
Page view:3,069
Online Visitors:36