engleski

Spectroelectrochemical investigation of copper-alloys for application in the marine environment

Copper-based alloys, such as the copper nickels, aluminum bronzes and nickel aluminum bronzes, have an extensive range of marine application. However, in spite of their excellent corrosion resistance, in some instances, corrosion has been observed due to water contamination, higher velocity and/or disturbed flows, even at low Reynolds numbers. To overcome the corrosion problem various methods of protection have been investigated and proposed. For example, benzotriazole has become one of the most effective inhibitors for Cu and Cu-Ni alloys in many electrolyte solutions [1, 2]. An excellent corrosion protective ability of self-assembled monolayers of alkanethiol [3, 4] and some complexing agents [5] on Cu and Cu-Ni alloy surfaces has been demonstrated. The aim of the present study was to investigate the influence of sodium-diethyl-dithiocarbamate and N-vinylcarbazole selfassembled films on the corrosion resistance of Cu and Cu-10 Ni alloy in simulated seawater at various impingement velocities by means of dc and ac electrochemical methods. The surface films were characterized using infrared spectroscopy and X-ray diffraction methods. Literature 1.M. Metikoš-Huković, R. Babić, A. Marinović, J. Electrochem. Soc. 145 (1988) 4045. 2.R. Babić, M. Metikoš-Huković, M. Lončar, Electrochim. Acta 44 (1999) 2413. 3.M. Metikoš-Huković, R. Babić, Ž. Petrović, D. Posavec, J. Electrochem. Soc. 154 (2007) C138. 4.Ž. Petrović, M. Metikoš-Huković, R. Babić, Prog. Org. Coat. 61 (2008) 1. 5.S. Martinez, M. Metikoš-Huković, J. Appl. Electrochem. 36 (2006) 1311.

copper-based alloys; sodium-diethyl-dithiocarbamate; N-vinylcarbazole; corrosion resistance

nije evidentirano