01722nab a2200205 4500 20260520000935.0 260224s2010 xxu Corrosion Inhibition of 2205 Duplex Stainless Steel in Acetic Acid Solution by Nitrite Anions jul. 2010 02/08/2010 ; 02/08/2010 8 p. ; 075002 Transcripción del resumen del autor. General and pitting corrosion of 2205 duplex stainless steel (UNS S32205) in acetic acid (CH3COOH) solution containing 0.01, 0.1, 0.2, and 0.5 M sodium bromide (NaBr) was studied using cyclic potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) techniques. The influence of nitrite anion as an inhibitor on the pitting corrosion was studied. Pitting potential was found to decrease linearly by increasing the logarithm of bromide ion concentration and was increased by increasing the nitrite ion concentration. Proper inhibition efficiency was achieved by the presence of 500 ppm to 1,000 ppm of nitrite (NO2-) anion. EIS measurements showed that the charge-transfer resistance (Rct) increased and the constant phase element of the double layer (CPEdl) decreased by increasing the NO2- ion concentration. Cyclic potentiodynamic polarization readings showed that the NO2- anions act as oxidizing agents. The inhibition efficiency was increased with NO2- ion concentration and the pitting susceptibility depended strongly on nitrite/bromide ion ratio. 7 Corrosion 66 ARTICULO Adeli, M. 46104 Raeissi, K. 43518 Golozar, M.A. 43519 175608 175608 0 0 0 0 243427 BAAB BAAB 2026-03-05 200047503 0 200047503 2026-03-05 18:55:50 2026-03-05 ARTICULO