Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution
The electrochemical behavior of a light weight refractory high entropy alloy (HEA) system (ZrVTiNbAl) was investigated by potentiodynamic polarization experiments and electrochemical impedance spectroscopy (EIS). Experiments were done in HNO3 (1 M and 0.1 M), NaOH (1 M and 0.1 M) and neutral aqueous...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | Journal of Alloys and Metallurgical Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949917824000920 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850053960846540800 |
|---|---|
| author | V. Dubey P. Chakraborty S. Roychowdhury R. Tewari |
| author_facet | V. Dubey P. Chakraborty S. Roychowdhury R. Tewari |
| author_sort | V. Dubey |
| collection | DOAJ |
| description | The electrochemical behavior of a light weight refractory high entropy alloy (HEA) system (ZrVTiNbAl) was investigated by potentiodynamic polarization experiments and electrochemical impedance spectroscopy (EIS). Experiments were done in HNO3 (1 M and 0.1 M), NaOH (1 M and 0.1 M) and neutral aqueous solution and the results were compared with that of SS304L in the same solution. Two compositions of ZrVTiNbAl were used in this investigation, one equiatomic (named C1) and the other non-equiatomic (35Nb25V25Ti10Al5Zr at%; named C2). Results indicated that the corrosion resistance of the equiatomic HEA (C1) having higher aluminum content (∼20 at% Al) was better than that of both C2 (∼10 at% Al) and SS304L in acidic as well as neutral solution. The higher corrosion resistance of C1 was demonstrated through the absence of trans-passive behavior, lowest passive current density and the lowest corrosion current. C2 showed very high corrosion current density and transpassive dissolution in 1 M and 0.1 M NaOH solution while SS304L showed transpassive dissolution in all the environments. Glow discharge optical emission spectroscopy and XPS analysis of the HEAs after potentiostatic polarization in 0.1 M HNO3 at 0.5 V(SCE) indicated the passive film formed on C1 to contain a mixture of oxides of all the alloying elements while C2 did not show the presence of Al2O3 in the passive film. The presence of Al₂O₃ in the passive film of C1 was identified as the key factor contributing to its superior corrosion resistance, as it promoted passivation behavior. |
| format | Article |
| id | doaj-art-eb600be750b540e681d1b9f55a4a59fa |
| institution | DOAJ |
| issn | 2949-9178 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Alloys and Metallurgical Systems |
| spelling | doaj-art-eb600be750b540e681d1b9f55a4a59fa2025-08-20T02:52:24ZengElsevierJournal of Alloys and Metallurgical Systems2949-91782025-03-01910014310.1016/j.jalmes.2024.100143Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solutionV. Dubey0P. Chakraborty1S. Roychowdhury2R. Tewari3Materials Processing & Corrosion Engineering Division, Bhabha Atomic Research Centre, Mumbai 400094, IndiaMaterials Science Division, Bhabha Atomic Research Centre, Mumbai 400094, IndiaMaterials Processing & Corrosion Engineering Division, Bhabha Atomic Research Centre, Mumbai 400094, India; Corresponding author.Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400094, IndiaThe electrochemical behavior of a light weight refractory high entropy alloy (HEA) system (ZrVTiNbAl) was investigated by potentiodynamic polarization experiments and electrochemical impedance spectroscopy (EIS). Experiments were done in HNO3 (1 M and 0.1 M), NaOH (1 M and 0.1 M) and neutral aqueous solution and the results were compared with that of SS304L in the same solution. Two compositions of ZrVTiNbAl were used in this investigation, one equiatomic (named C1) and the other non-equiatomic (35Nb25V25Ti10Al5Zr at%; named C2). Results indicated that the corrosion resistance of the equiatomic HEA (C1) having higher aluminum content (∼20 at% Al) was better than that of both C2 (∼10 at% Al) and SS304L in acidic as well as neutral solution. The higher corrosion resistance of C1 was demonstrated through the absence of trans-passive behavior, lowest passive current density and the lowest corrosion current. C2 showed very high corrosion current density and transpassive dissolution in 1 M and 0.1 M NaOH solution while SS304L showed transpassive dissolution in all the environments. Glow discharge optical emission spectroscopy and XPS analysis of the HEAs after potentiostatic polarization in 0.1 M HNO3 at 0.5 V(SCE) indicated the passive film formed on C1 to contain a mixture of oxides of all the alloying elements while C2 did not show the presence of Al2O3 in the passive film. The presence of Al₂O₃ in the passive film of C1 was identified as the key factor contributing to its superior corrosion resistance, as it promoted passivation behavior.http://www.sciencedirect.com/science/article/pii/S2949917824000920Refractory High Entropy AlloyCorrosion ResistancePassive filmPolarisation behaviourEIS |
| spellingShingle | V. Dubey P. Chakraborty S. Roychowdhury R. Tewari Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution Journal of Alloys and Metallurgical Systems Refractory High Entropy Alloy Corrosion Resistance Passive film Polarisation behaviour EIS |
| title | Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution |
| title_full | Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution |
| title_fullStr | Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution |
| title_full_unstemmed | Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution |
| title_short | Polarisation studies of ZrVTiNbAl high entropy alloy in acidic, neutral and basic aqueous solution |
| title_sort | polarisation studies of zrvtinbal high entropy alloy in acidic neutral and basic aqueous solution |
| topic | Refractory High Entropy Alloy Corrosion Resistance Passive film Polarisation behaviour EIS |
| url | http://www.sciencedirect.com/science/article/pii/S2949917824000920 |
| work_keys_str_mv | AT vdubey polarisationstudiesofzrvtinbalhighentropyalloyinacidicneutralandbasicaqueoussolution AT pchakraborty polarisationstudiesofzrvtinbalhighentropyalloyinacidicneutralandbasicaqueoussolution AT sroychowdhury polarisationstudiesofzrvtinbalhighentropyalloyinacidicneutralandbasicaqueoussolution AT rtewari polarisationstudiesofzrvtinbalhighentropyalloyinacidicneutralandbasicaqueoussolution |