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Title

Passivity of AISI ۳۱۶L stainless steel as a function of nitric concentration

Year: 1393
COI: JR_JMATPR-2-2_003
Language: EnglishView: 36
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Authors

Arash Fattah-alhosseini - Faculty of Engineering, Bu-Ali Sina University, Hamedan,Iran
Mohamad Ali Sonamia - Faculty of Engineering, Bu-Ali Sina University, Hamedan,Iran
Atena Loghmani - Faculty of Engineering, Bu-Ali Sina University, Hamedan,Iran
Fariba Zerafati Shoja - Faculty of Engineering, Bu-Ali Sina University, Hamedan,Iran

Abstract:

In this study, electrochemical behaviour of passive films formed on AISI ۳۱۶L stainless steel (AISI ۳۱۶L) in three acidic solutions concentrations (۰.۳, ۰.۶, and ۰.۹M HNO۳) under open circuit potential conditions were evaluated by potentiodynamic polarization, Mott–Schottky analysis and electrochemical impedance spectroscopy (EIS) techniques. The potentiodynamic polarization results showed that the corrosion potentials of AISI ۳۱۶L shift towards positive direction with increase in solution concentration. Also, these results reveal that the corrosion rate of AISI ۳۱۶L is enhanced in solutions with higher nitric content. Mott–Schottky analysis revealed that passive films behave as p-type and n-type semiconductors at potentials below and above the flat band potential, respectively. Also, Mott–Schottky analysis indicated that the donor and acceptor densities increased with solution concentration. EIS data showed that the equivalent circuit Rs((RctQdl)(RfQf)) by two time constants is applicable. Also, EIS results reveal that the charge transfer resistance and passive film resistance decrease with solution concentration.

Keywords:

Paper COI Code

This Paper COI Code is JR_JMATPR-2-2_003. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1282681/

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Fattah-alhosseini, Arash and Sonamia, Mohamad Ali and Loghmani, Atena and Zerafati Shoja, Fariba,1393,Passivity of AISI ۳۱۶L stainless steel as a function of nitric concentration,https://civilica.com/doc/1282681

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Type of center: دانشگاه دولتی
Paper count: 11,240
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