Naslov
The Inhibition of Copper-Nickel Alloy Corrosion under Controlled Hydrodynamic Condition in Seawater

Autori
Martinez, Sanja ; Metikoš-Huković, Mirjana

Izvornik
Journal of Applied Electrochemistry (0021-891X) 36 (2006), 12; 1311-1315

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
copper alloys; corrosion; inhibitor; chelate complex; sodium-diethyl-dithiocarbamate; hydrodynamic conditions; jet impingement attack

Sažetak
A comparative study of the corrosion resistance of a bare Cu-10 Ni alloy and a Cu-10 Ni alloy protected by sodium-diethyl-dithiocarbamate (NaEt2dtc) has been undertaken. The experimental conditions varied from quiescent natural seawater to seawater subjected to jet impingement of different fluid velocities. The mechanism of inhibitor action has been suggested that includes the formation of a surface chelate compound between the dissolving metal ion and the (Et2dtc)- ligand, as well as formation of a 3-D ternary surface complex. The surface layer that incorporates both the inhibitor and the cuprous oxide, represented by the structure: Cu-Ni / Cu2O / Cu(II) organic complex / seawater has shown an excellent protective performance with efficiency > 90% under stagnant and fluid impingement conditions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

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