Naslov
Corrosion inhibition of CuNi10Fe alloy with phenolic acids

Autori
Vrsalović, Ladislav ; Oguzie, Emeka Emmanuel ; Kliškić, Maja ; Gudić, Senka

Izvornik
Chemical engineering communications (0098-6445) 198 (2011), 11; 1380-1393

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

Ključne riječi
Cu-Ni alloys ; corrosion inhibition ; p-hidroxybenzoic acid ; protocatechuic acid

Sažetak
The purpose of this study was to investigate the efficiency of two phenolic acids, namely p- hidroxybenzoic acid (HBA) and protocatechuic acid (PCA), as corrosion inhibitors for CuNi10Fe alloy in 0.5 mol dm-3 NaCl solution. In these investigations, open circuit potential measurements, potentiodynamic polarization measurements and linear polarization method have been used. It was found that both phenolic acids had similar corrosion inhibition effects on CuNi10Fe alloy dissolution. Inhibition efficiency (IE) increased with increase in inhibitor concentration. The polarization shows that both compounds functioned as cathodic corrosion inhibitors by adsorption on the surface of CuNi10Fe alloy according to the Freundlich adsorption isotherm. The numerical values of free energies of adsorption indicate physical adsorption of the compounds on electrode surface. DFT-based quantum chemical computations and molecular dynamics (MD) simulations revealed identical electronic and adsorption structures for both HBA and PCA, which could account for the similarities in the experimentally observed inhibiting effects.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

Napomena
Glavni autor rada: Ladislav Vrsalović

POVEZANOST RADA