Oxyanions as inhibitors of chloride-induced crevice corrosion of Alloy 22

• Published in: Corrosion Science
• Main Authors: Rincón Ortiz, Mauricio, Rodríguez, Martín Alejandro, Carranza, Ricardo Mario, Rebak, Raul Basilio
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier
• Subjects: Alloy; Polarization; Crevice Corrosion; Repassivation; https://purl.org/becyt/ford/1.4; https://purl.org/becyt/ford/1; https://purl.org/becyt/ford/2.5; https://purl.org/becyt/ford/2; Argentina; Ortiz; Ricardo; San Martín; Carbonic acid
• Online Access: http://hdl.handle.net/11336/23953

Oxyanions were tested as inhibitors of the chloride-induced crevice corrosion of Alloy 22, at 90 °C. Nitrate was the most efficient inhibitor showing RCRIT = 0.2 for the two tested chloride concentrations. Sulphate showed RCRIT values of 1 and 2 in 0.1 mol/L and 1 mol/L NaCl solutions, respectively. Carbonate showed RCRIT = 1 while bicarbonate and carbonic acid did not show any inhibiting effect. Chromate and molybdate showed RCRIT = 0.5 in 0.1 mol/L NaCl solutions being less effective in 1 mol/L NaCl solutions. Tungstate produced a repassivation potential increase without reaching a complete inhibition. Fil: Rincón Ortiz, Mauricio. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Rodríguez, Martín Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Comisión Nacional de Energía Atómica; Argentina Fil: Carranza, Ricardo Mario. Comisión Nacional de Energía Atómica; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina Fil: Rebak, Raul Basilio. Global Research; Estados Unidos