Corrosion Resistance of Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) High-Entropy Alloys in 0.5M H2SO4 Solution
The electrochemical behavior of the as-cast Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) high-entropy alloys (HEAs) in a 0.5M H2SO4 solution was studied. Polarization measurements were carried out in a standard three-electrode electrochemical cell at room temperature using a platinum counter elec...
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| Veröffentlicht in: | Materials 2023-05, Vol.16 (9), p.3585 |
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| description | The electrochemical behavior of the as-cast Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) high-entropy alloys (HEAs) in a 0.5M H2SO4 solution was studied. Polarization measurements were carried out in a standard three-electrode electrochemical cell at room temperature using a platinum counter electrode and a saturated silver chloride reference electrode. For Al0.5CoCrFeNiCu0.5 and Al0.5CoCrFeNiCu0.5Ag0.1, copper segregation along the grain boundaries was observed, which highly dissolved in the sulfuric acid solution and resulted in low corrosion resistance of the samples. Introducing Ag into Al0.5CoCrFeNiCu0.25 HEA led to the precipitation of a copper–silver eutectic structure, in which the copper regions were selectively dissolved in the sulfuric acid solution. Al0.5CoCrFeNiCu0.25 exhibited the best corrosion resistance with the corrosion current density of Icorr = 3.52 ± 0.02 μA/cm2, significantly superior to that of the Al0.5CoCrFeNi sample without copper and silver (Icorr = 6.05 ± 0.05 μA/cm2). Finally, the results indicated that suppressing elemental segregation by annealing or tailoring chemical composition is essential to improve the corrosion resistance of Al0.5CoCrFeNiCuxAgy HEAs. |
| doi_str_mv | 10.3390/ma16093585 |
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Polarization measurements were carried out in a standard three-electrode electrochemical cell at room temperature using a platinum counter electrode and a saturated silver chloride reference electrode. For Al0.5CoCrFeNiCu0.5 and Al0.5CoCrFeNiCu0.5Ag0.1, copper segregation along the grain boundaries was observed, which highly dissolved in the sulfuric acid solution and resulted in low corrosion resistance of the samples. Introducing Ag into Al0.5CoCrFeNiCu0.25 HEA led to the precipitation of a copper–silver eutectic structure, in which the copper regions were selectively dissolved in the sulfuric acid solution. Al0.5CoCrFeNiCu0.25 exhibited the best corrosion resistance with the corrosion current density of Icorr = 3.52 ± 0.02 μA/cm2, significantly superior to that of the Al0.5CoCrFeNi sample without copper and silver (Icorr = 6.05 ± 0.05 μA/cm2). Finally, the results indicated that suppressing elemental segregation by annealing or tailoring chemical composition is essential to improve the corrosion resistance of Al0.5CoCrFeNiCuxAgy HEAs.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma16093585</identifier><identifier>PMID: 37176467</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Alloys ; Chemical composition ; Copper ; Corrosion currents ; Corrosion potential ; Corrosion resistance ; Corrosion tests ; Electrochemical analysis ; Electrochemical cells ; Electrode polarization ; Electrodes ; Grain boundaries ; High entropy alloys ; Measuring instruments ; Room temperature ; Silver ; Silver chloride ; Sulfuric acid</subject><ispartof>Materials, 2023-05, Vol.16 (9), p.3585</ispartof><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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Polarization measurements were carried out in a standard three-electrode electrochemical cell at room temperature using a platinum counter electrode and a saturated silver chloride reference electrode. For Al0.5CoCrFeNiCu0.5 and Al0.5CoCrFeNiCu0.5Ag0.1, copper segregation along the grain boundaries was observed, which highly dissolved in the sulfuric acid solution and resulted in low corrosion resistance of the samples. Introducing Ag into Al0.5CoCrFeNiCu0.25 HEA led to the precipitation of a copper–silver eutectic structure, in which the copper regions were selectively dissolved in the sulfuric acid solution. Al0.5CoCrFeNiCu0.25 exhibited the best corrosion resistance with the corrosion current density of Icorr = 3.52 ± 0.02 μA/cm2, significantly superior to that of the Al0.5CoCrFeNi sample without copper and silver (Icorr = 6.05 ± 0.05 μA/cm2). Finally, the results indicated that suppressing elemental segregation by annealing or tailoring chemical composition is essential to improve the corrosion resistance of Al0.5CoCrFeNiCuxAgy HEAs.</description><subject>Alloys</subject><subject>Chemical composition</subject><subject>Copper</subject><subject>Corrosion currents</subject><subject>Corrosion potential</subject><subject>Corrosion resistance</subject><subject>Corrosion tests</subject><subject>Electrochemical analysis</subject><subject>Electrochemical cells</subject><subject>Electrode polarization</subject><subject>Electrodes</subject><subject>Grain boundaries</subject><subject>High entropy alloys</subject><subject>Measuring instruments</subject><subject>Room temperature</subject><subject>Silver</subject><subject>Silver chloride</subject><subject>Sulfuric acid</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkdtO3DAQhi0EKmjLTZ_AUm-gIlsf4sQWQmgVQReJFonDteV1JotRNl7spCJvjyNQWzoXnt_yN-M5IPSFkjnninzfGFoQxYUUO-iAKlVkVOX57j96Hx3G-ESScU4lU5_QPi9pWeRFeYBC5UPw0fkO30J0sTedBewbvGjJXFS-Cpfwy1XDy2I94qMXfIbJnImTdIpTPE7XSdNjvHTrx-yi64Pfjim49WPErpu4n3jJ7m5yfOfboU8ffUZ7jWkjHL77GXq4vLivltn1zY-ranGdWS7zPiuJtbWhqia1KRlAszIGDFAmSU1W0jSpB1tbKBqQBZgVkTnwAmxDrSSsJnyGzt_ybofVBhKZijOt3ga3MWHU3jj98aVzj3rtf2tKaKlkmtYMHb1nCP55gNjrjYsW2tZ04IeomaRcCCW4SOjX_9AnP4Qu9TdRrCC5oixR394om2YeAzR_qqFET-vUf9fJXwGgPIyD</recordid><startdate>20230507</startdate><enddate>20230507</enddate><creator>Samoilova, Olga</creator><creator>Pratskova, Svetlana</creator><creator>Shaburova, Nataliya</creator><creator>Ostovari Moghaddam, Ahmad</creator><creator>Trofimov, Evgeny</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-8339-8293</orcidid><orcidid>https://orcid.org/0000-0002-5316-3773</orcidid></search><sort><creationdate>20230507</creationdate><title>Corrosion Resistance of Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) High-Entropy Alloys in 0.5M H2SO4 Solution</title><author>Samoilova, Olga ; Pratskova, Svetlana ; Shaburova, Nataliya ; Ostovari Moghaddam, Ahmad ; Trofimov, Evgeny</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c384t-70ccda19d0da72eefbaaeae1280d0b8af717cdce6fe86eab084e36ecf1c802d03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Alloys</topic><topic>Chemical composition</topic><topic>Copper</topic><topic>Corrosion currents</topic><topic>Corrosion potential</topic><topic>Corrosion resistance</topic><topic>Corrosion tests</topic><topic>Electrochemical analysis</topic><topic>Electrochemical cells</topic><topic>Electrode polarization</topic><topic>Electrodes</topic><topic>Grain boundaries</topic><topic>High entropy alloys</topic><topic>Measuring instruments</topic><topic>Room temperature</topic><topic>Silver</topic><topic>Silver chloride</topic><topic>Sulfuric acid</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Samoilova, Olga</creatorcontrib><creatorcontrib>Pratskova, Svetlana</creatorcontrib><creatorcontrib>Shaburova, Nataliya</creatorcontrib><creatorcontrib>Ostovari Moghaddam, Ahmad</creatorcontrib><creatorcontrib>Trofimov, Evgeny</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Access via ProQuest (Open Access)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Samoilova, Olga</au><au>Pratskova, Svetlana</au><au>Shaburova, Nataliya</au><au>Ostovari Moghaddam, Ahmad</au><au>Trofimov, Evgeny</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Corrosion Resistance of Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) High-Entropy Alloys in 0.5M H2SO4 Solution</atitle><jtitle>Materials</jtitle><date>2023-05-07</date><risdate>2023</risdate><volume>16</volume><issue>9</issue><spage>3585</spage><pages>3585-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>The electrochemical behavior of the as-cast Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) high-entropy alloys (HEAs) in a 0.5M H2SO4 solution was studied. Polarization measurements were carried out in a standard three-electrode electrochemical cell at room temperature using a platinum counter electrode and a saturated silver chloride reference electrode. For Al0.5CoCrFeNiCu0.5 and Al0.5CoCrFeNiCu0.5Ag0.1, copper segregation along the grain boundaries was observed, which highly dissolved in the sulfuric acid solution and resulted in low corrosion resistance of the samples. Introducing Ag into Al0.5CoCrFeNiCu0.25 HEA led to the precipitation of a copper–silver eutectic structure, in which the copper regions were selectively dissolved in the sulfuric acid solution. Al0.5CoCrFeNiCu0.25 exhibited the best corrosion resistance with the corrosion current density of Icorr = 3.52 ± 0.02 μA/cm2, significantly superior to that of the Al0.5CoCrFeNi sample without copper and silver (Icorr = 6.05 ± 0.05 μA/cm2). Finally, the results indicated that suppressing elemental segregation by annealing or tailoring chemical composition is essential to improve the corrosion resistance of Al0.5CoCrFeNiCuxAgy HEAs.</abstract><cop>Basel</cop><pub>MDPI AG</pub><pmid>37176467</pmid><doi>10.3390/ma16093585</doi><orcidid>https://orcid.org/0000-0001-8339-8293</orcidid><orcidid>https://orcid.org/0000-0002-5316-3773</orcidid><oa>free_for_read</oa></addata></record> |
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| source | PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Alloys Chemical composition Copper Corrosion currents Corrosion potential Corrosion resistance Corrosion tests Electrochemical analysis Electrochemical cells Electrode polarization Electrodes Grain boundaries High entropy alloys Measuring instruments Room temperature Silver Silver chloride Sulfuric acid |
| title | Corrosion Resistance of Al0.5CoCrFeNiCuxAgy (x = 0.25, 0.5; y = 0, 0.1) High-Entropy Alloys in 0.5M H2SO4 Solution |
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