Naslov
Utjecaj metode nanošenja filma fosfonske kiseline na njegovu djelotvornost u korozijskoj zaštiti CuNi legure u morskoj vodi
(The influence of phosphonic acid film application method on its efficiency in corrosion protection of CuNi alloy in seawater)

Autori
Kristan Mioč, Ekatarina ; Hajdari Gretić, Zana ; Otmačić Ćurković, Helena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
25th Croatian meeting of chemists and chemical engineers, Book of abstract / Đaković, Marijana ; Miljanić, Snežana ; Šantić, Ana ; Vianello, Robert - : Hrvatsko kemijsko društvo, 2017, 217-217

ISBN
978-953-55232-7-7

Skup
25. Hrvatski skup kemičara i kemijskih inženjera s međunarodnim sudjelovanjem

Mjesto i datum
Poreč, Hrvatska, 19.04.2017. - 22.04.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
corrosion protection ; copper-nickel alloy ; self-assembled layers ; long chain organic acids
(corrosion protection ; copper-nickel alloy ; self-assembled layers ; phosphonic acid)

Sažetak
The preparation of self-assembled monolayers (SAMs) on metal or metal-oxide substrates is an important research topic in the field of surface engineering [1]. Reproducible preparation of well-defined and stable monolayers requires appropriate choice of both the self-assembling molecule and the preparation method. Phosphonic acids are a class of molecules particularly known for their spontaneous self- assembly on oxidized substrates. They easily chemisorb on many metals and alloys and show good resistance to hydrolysis. While phosphonic acids have become popular surface modifiers for metal oxides in various fields, especially in the past decade [2-6], there is still a lack of consensus on deposition protocols. Very limited study of phosphonic acid SAMs on cupronickel alloy have been performed, mainly with the dip-coating method [7], which is time consuming, requires high amounts of working solution and is not always practical for application in industry. The aim of this work is to investigate the possibility of cupronickel alloy protection by self-assembled monolayers of octadecylphosphonic acid (ODPA) prepared by different techniques: dip-coating, electrochemical method and spraying. Each one of these techniques has some advantages: dip- coating method is simple, electrochemical method is less time consuming, but spraying is more practical than the above mentioned methods. The protective properties of such formed monolayers are examined in artificial seawater by electrochemical polarization methods and electrochemical impedance spectroscopy while the structure of the film is determined by contact angle measurements, scanning electron microscopy and Fourier transform infrared spectroscopy. The results of electrochemical investigations show that by using an adequate preparation method and conditions (temperature, time, applied potential etc.) it is possible to form protective layer of phosphonic acid that significantly reduces cupronickel corrosion rate in seawater. References [1] S. P. Pujari, L. Scheres, A. T. M. Marcelis and H. Zuilhof, Angew. Chem. Int. Ed. 53 (2014) 6322-6356. [2] C. Queffelec, M. Petit, P. Janvier, D. A. Knight and B. Bujoli, Chem. Rev. 112 (2012) 3777-3807. [3] R. Bhure, T. M. Abdel-Fattah, C. Bonner, F. Hall and A. Mahapatro, Appl. Surf. Sci. 257 (2011) 5605-5612. [4] M. Cichomski, K. Kosla, J. Grobelny, W. Kozlowski and W. Szmaja, Appl. Surf. Sci. 273 (2013) 570-577. [5] B. Branch, M. Dubey, A. S. Anderson, K. Artyushkova, J. K. Baldwin, D. Petsev and A. M. Dattelbaum, Appl. Surf. Sci. 288 (2014) 98-108. [7] S. A. Paniagua, E. L. Li and S. R. Marder, Phys. Chem. Chem. Phys. 16 (2014) 2874-2881. [8] K. M. Kruszewski, E. R. Renk and E. S. Gawalt, Thin Solid Films 520 (2012) 4326-4331. Acknowledgments The research leading to these results has received funding from Croatian Science Foundation under grant agreement 9.01/253.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA