The effect of fluoride on the electrochemical corrosion behavior of an LDX 2101® duplex stainless steel (DSS) was studied. Open‐circuit potential (EOC) and electrochemical impedance spectroscopy (EIS) measurements were carried out in artificial saliva and with the addition of fluoride (1 wt% NaF). The electrochemical corrosion behavior of the AISI 316L austenitic stainless steel (SS) was also evaluated for comparison. Both open‐circuit potential and EIS results indicate that DSS and austenitic SS undergo spontaneous passivation due to spontaneously formed oxide film passivating the metallic surface, in the simulated aggressive environments. However, LDX 2101® exhibits superior corrosion resistance as compared with AISI 316L, and this improvement is ascribed to the formation of a passive film which shows a higher protective effect than the one formed on AISI 316L.

Electrochemical corrosion behavior of LDX 2101® duplex stainless steel in a fluoride‐containing environment / Rosalbino, Francesco; Scavino, Giorgio; Ubertalli, Graziano. - In: MATERIALS AND CORROSION. - ISSN 1521-4176. - ELETTRONICO. - 71:(2020), pp. 2021-2028. [10.1002/maco.202011826]

Electrochemical corrosion behavior of LDX 2101® duplex stainless steel in a fluoride‐containing environment

Francesco Rosalbino;Giorgio Scavino;Graziano Ubertalli
2020

Abstract

The effect of fluoride on the electrochemical corrosion behavior of an LDX 2101® duplex stainless steel (DSS) was studied. Open‐circuit potential (EOC) and electrochemical impedance spectroscopy (EIS) measurements were carried out in artificial saliva and with the addition of fluoride (1 wt% NaF). The electrochemical corrosion behavior of the AISI 316L austenitic stainless steel (SS) was also evaluated for comparison. Both open‐circuit potential and EIS results indicate that DSS and austenitic SS undergo spontaneous passivation due to spontaneously formed oxide film passivating the metallic surface, in the simulated aggressive environments. However, LDX 2101® exhibits superior corrosion resistance as compared with AISI 316L, and this improvement is ascribed to the formation of a passive film which shows a higher protective effect than the one formed on AISI 316L.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2855214