EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION
In this study, effect of immersion time on the electrochemical behaviour of AISI 321 stainless steel (AISI 321) in 0.1 M H 2SO 4 solution under open circuit potential (OCP) conditions was evaluated by potentiodynamic polarization, Mott–Schottky analysis and electrochemical impedance spectroscopy (EI...
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| Format: | Article |
| Language: | English |
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Iran University of Science & Technology
2014-06-01
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| Series: | Iranian Journal of Materials Science and Engineering |
| Subjects: | |
| Online Access: | http://ijmse.iust.ac.ir/browse.php?a_code=A-10-127-52&slc_lang=en&sid=1 |
| _version_ | 1818253201554538496 |
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| author | A. Fattah-alhosseini O. Imantalab |
| author_facet | A. Fattah-alhosseini O. Imantalab |
| author_sort | A. Fattah-alhosseini |
| collection | DOAJ |
| description | In this study, effect of immersion time on the electrochemical behaviour of AISI 321 stainless steel (AISI 321)
in 0.1 M H
2SO
4
solution under open circuit potential (OCP) conditions was evaluated by potentiodynamic
polarization, Mott–Schottky analysis and electrochemical impedance spectroscopy (EIS). Mott–Schottky analysis
revealed that the passive films behave as n-type and p-type semiconductors at potentials below and above the flat band
potential, respectively. Also, Mott–Schottky analysis indicated that the donor and acceptor densities are in the range
1021 cm-3 and increased with the immersion time. EIS results showed that the best equivalent circuit presents two time
constants: The high-medium frequencies time constant can be correlated with the charge transfer process and the low
frequencies time constant has been associated with the redox processes taking place in the surface film. According to
this equivalent circuit, the polarization resistance (interfacial impedance) initially increases with the immersion time
(1 to 12 h), and then it is observed to decreases. This variation is fully accordance with potentiodynamic polarization
results |
| first_indexed | 2024-12-12T16:36:19Z |
| format | Article |
| id | doaj.art-5d8b0875b31f4ea5a939bd54efecb5da |
| institution | Directory Open Access Journal |
| issn | 1735-0808 2383-3882 |
| language | English |
| last_indexed | 2024-12-12T16:36:19Z |
| publishDate | 2014-06-01 |
| publisher | Iran University of Science & Technology |
| record_format | Article |
| series | Iranian Journal of Materials Science and Engineering |
| spelling | doaj.art-5d8b0875b31f4ea5a939bd54efecb5da2022-12-22T00:18:40ZengIran University of Science & TechnologyIranian Journal of Materials Science and Engineering1735-08082383-38822014-06-011125770EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTIONA. Fattah-alhosseini0O. Imantalab1 Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran. Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran. In this study, effect of immersion time on the electrochemical behaviour of AISI 321 stainless steel (AISI 321) in 0.1 M H 2SO 4 solution under open circuit potential (OCP) conditions was evaluated by potentiodynamic polarization, Mott–Schottky analysis and electrochemical impedance spectroscopy (EIS). Mott–Schottky analysis revealed that the passive films behave as n-type and p-type semiconductors at potentials below and above the flat band potential, respectively. Also, Mott–Schottky analysis indicated that the donor and acceptor densities are in the range 1021 cm-3 and increased with the immersion time. EIS results showed that the best equivalent circuit presents two time constants: The high-medium frequencies time constant can be correlated with the charge transfer process and the low frequencies time constant has been associated with the redox processes taking place in the surface film. According to this equivalent circuit, the polarization resistance (interfacial impedance) initially increases with the immersion time (1 to 12 h), and then it is observed to decreases. This variation is fully accordance with potentiodynamic polarization resultshttp://ijmse.iust.ac.ir/browse.php?a_code=A-10-127-52&slc_lang=en&sid=1Stainless steel immersion time Mott–Schottky Equivalent circuit |
| spellingShingle | A. Fattah-alhosseini O. Imantalab EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION Iranian Journal of Materials Science and Engineering Stainless steel immersion time Mott–Schottky Equivalent circuit |
| title | EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION |
| title_full | EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION |
| title_fullStr | EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION |
| title_full_unstemmed | EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION |
| title_short | EFFECT OF IMMERSION TIME ON THE ELECTROCHEMICAL BEHAVIOUR OF AISI 321 STAINLESS STEEL IN 0.1 M H2SO4 SOLUTION |
| title_sort | effect of immersion time on the electrochemical behaviour of aisi 321 stainless steel in 0 1 m h2so4 solution |
| topic | Stainless steel immersion time Mott–Schottky Equivalent circuit |
| url | http://ijmse.iust.ac.ir/browse.php?a_code=A-10-127-52&slc_lang=en&sid=1 |
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