info:eu-repo/semantics/article
Crevice corrosion kinetics of nickel alloys bearing chromium and molybdenum
Fecha
2012-08Registro en:
Zadorozne, Natalia Silvina; Giordano, C.M.; Rodríguez, Martín Alejandro; Carranza, Ricardo Mario; Rebak, Raul Basilio; Crevice corrosion kinetics of nickel alloys bearing chromium and molybdenum; Pergamon-Elsevier Science Ltd; Electrochimica Acta; 76; 8-2012; 94-101
0013-4686
CONICET Digital
CONICET
Autor
Zadorozne, Natalia Silvina
Giordano, C.M.
Rodríguez, Martín Alejandro
Carranza, Ricardo Mario
Rebak, Raul Basilio
Resumen
The crevice corrosion kinetics of alloys C-22, C-22HS and HYBRID-BC1 was studied in several chloride solutions at 90°C. The crevice corrosion resistance of the alloys increased with PREN (Pitting Resistance Equivalent Number), which is mainly affected by the Mo content in the alloys. The crevice corrosion kinetics of the three alloys was analyzed at potentials slightly higher than the repassivation potential. Crevice propagation was controlled by ohmic drop in the more dilute chloride solutions, and by charge transfer in the more concentrated chloride solutions. Ohmic drop was not a necessary condition for crevice corrosion to occur. © 2012 Elsevier Ltd. All rights reserved.