Dynamic Polarization Behaviors of Equimolar CoCrFeNi High-Entropy Alloy Compared with 304 Stainless Steel in 0.5 M H2SO4 Aerated Aqueous Solution
Three corrosion potentials and three corrosion current densities are clearly identified before the passivation for both dynamic polarization curves of equimolar CoCrFeNi high-entropy alloy (HEA) and 304 stainless steel (304SS) in 0.5 M H2SO4 aerated aqueous solution, by decomposing anodic and cathodic polarization curves. The passivated current density of the former is greater than the latter, compliant with not only the constant of solubility product (ksp) and redox equilibrium potential (Eeq) of each metal hydroxide but also the sequence of bond energy (Eb) for monolayer hydroxide on their facets derived from the first principle founded on density function theory. However, the total amount of ion releasing from HEA is less than 304SS, since the hydroxide/oxide film formed in the air of the latter containing greater amounts of Fe(Ⅱ) and Mn(Ⅱ) is less stable around corrosion potentials while they are further oxidized into more stable Fe(Ⅲ) and Mn(ⅢorⅣ) with much lower ksp, leading to the much less increasing ratios of ion releases from 0.25 to 0.6 V.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:15 |
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| Enthalten in: |
Materials (Basel, Switzerland) - 15(2022), 19 vom: 08. Okt. |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yen, Chao-Chun [VerfasserIn] |
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| Links: |
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| Themen: |
First-principles calculations |
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| Anmerkungen: |
Date Revised 19.10.2022 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.3390/ma15196976 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM347493823 |
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| 100 | 1 | |a Yen, Chao-Chun |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Dynamic Polarization Behaviors of Equimolar CoCrFeNi High-Entropy Alloy Compared with 304 Stainless Steel in 0.5 M H2SO4 Aerated Aqueous Solution |
| 264 | 1 | |c 2022 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
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| 500 | |a Date Revised 19.10.2022 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Three corrosion potentials and three corrosion current densities are clearly identified before the passivation for both dynamic polarization curves of equimolar CoCrFeNi high-entropy alloy (HEA) and 304 stainless steel (304SS) in 0.5 M H2SO4 aerated aqueous solution, by decomposing anodic and cathodic polarization curves. The passivated current density of the former is greater than the latter, compliant with not only the constant of solubility product (ksp) and redox equilibrium potential (Eeq) of each metal hydroxide but also the sequence of bond energy (Eb) for monolayer hydroxide on their facets derived from the first principle founded on density function theory. However, the total amount of ion releasing from HEA is less than 304SS, since the hydroxide/oxide film formed in the air of the latter containing greater amounts of Fe(Ⅱ) and Mn(Ⅱ) is less stable around corrosion potentials while they are further oxidized into more stable Fe(Ⅲ) and Mn(ⅢorⅣ) with much lower ksp, leading to the much less increasing ratios of ion releases from 0.25 to 0.6 V | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a ICP-MS | |
| 650 | 4 | |a first-principles calculations | |
| 650 | 4 | |a high-entropy alloy | |
| 650 | 4 | |a passive film | |
| 650 | 4 | |a polarization | |
| 700 | 1 | |a Tsai, Ting-Lun |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Bo-Wei |e verfasserin |4 aut | |
| 700 | 1 | |a Lo, Yu-Chieh |e verfasserin |4 aut | |
| 700 | 1 | |a Tsai, Ming-Hung |e verfasserin |4 aut | |
| 700 | 1 | |a Yen, Shiow-Kang |e verfasserin |4 aut | |
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