Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment
The corrosion behavior and corrosion mechanism of the Pb-rich phase and Cu-rich structure of the Sn–Pb bronze alloy in a high-chloride and high-humidity environment were studied. The phase composition of the bronze alloy was analyzed by observing the metallographic and EPMA element distribution, the...
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| Format: | Article |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424000681 |
| _version_ | 1797247849923084288 |
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| author | Xiuyuan Wang Herong Zhou Jialiang Song Zhiheng Fan Liming Zhang Jingrui Shi Jiachang Chen Kui Xiao |
| author_facet | Xiuyuan Wang Herong Zhou Jialiang Song Zhiheng Fan Liming Zhang Jingrui Shi Jiachang Chen Kui Xiao |
| author_sort | Xiuyuan Wang |
| collection | DOAJ |
| description | The corrosion behavior and corrosion mechanism of the Pb-rich phase and Cu-rich structure of the Sn–Pb bronze alloy in a high-chloride and high-humidity environment were studied. The phase composition of the bronze alloy was analyzed by observing the metallographic and EPMA element distribution, the potential of the microstructure was characterized by SKPFM. The corrosion products and morphology results after electrochemical and neutral salt spray tests were analyzed. The results showed that the matrix structure of bronze material was composed of Pb-rich phase and Cu-rich structure (α(I) phase and (δ+α(II)) eutectoid). During the corrosion process, the rich Pb phase preferentially corroded as the anode and diffused towards the surroundings, while the rich Cu structure served as the cathode. In the rich-Cu structure, compared with δ, the α phase was used as the anode. The corrosion products on the alloy surface mainly included Cu2O, PbCO3, and Cu2(OH)3Cl. As the corrosion gradually deepened along the depth of α phase, the galvanic couple effect between α phase and δ phase and the “oxygen concentration cell” effect gradually increased. |
| first_indexed | 2024-03-08T11:42:00Z |
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| id | doaj.art-0338d21525d04ba5a6d58713ba510077 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:14Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0338d21525d04ba5a6d58713ba5100772024-03-24T06:57:11ZengElsevierJournal of Materials Research and Technology2238-78542024-03-0129881896Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environmentXiuyuan Wang0Herong Zhou1Jialiang Song2Zhiheng Fan3Liming Zhang4Jingrui Shi5Jiachang Chen6Kui Xiao7The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; Corresponding author.The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, ChinaHenan Provincial Institute of Cultural Relics and Archaeology, Zhengzhou, 450007, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, ChinaThe corrosion behavior and corrosion mechanism of the Pb-rich phase and Cu-rich structure of the Sn–Pb bronze alloy in a high-chloride and high-humidity environment were studied. The phase composition of the bronze alloy was analyzed by observing the metallographic and EPMA element distribution, the potential of the microstructure was characterized by SKPFM. The corrosion products and morphology results after electrochemical and neutral salt spray tests were analyzed. The results showed that the matrix structure of bronze material was composed of Pb-rich phase and Cu-rich structure (α(I) phase and (δ+α(II)) eutectoid). During the corrosion process, the rich Pb phase preferentially corroded as the anode and diffused towards the surroundings, while the rich Cu structure served as the cathode. In the rich-Cu structure, compared with δ, the α phase was used as the anode. The corrosion products on the alloy surface mainly included Cu2O, PbCO3, and Cu2(OH)3Cl. As the corrosion gradually deepened along the depth of α phase, the galvanic couple effect between α phase and δ phase and the “oxygen concentration cell” effect gradually increased.http://www.sciencedirect.com/science/article/pii/S2238785424000681High Sn–Pb bronze alloyNeutral salt spray testCorrosion behaviorGalvanic effectOxygen concentration cell |
| spellingShingle | Xiuyuan Wang Herong Zhou Jialiang Song Zhiheng Fan Liming Zhang Jingrui Shi Jiachang Chen Kui Xiao Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment Journal of Materials Research and Technology High Sn–Pb bronze alloy Neutral salt spray test Corrosion behavior Galvanic effect Oxygen concentration cell |
| title | Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment |
| title_full | Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment |
| title_fullStr | Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment |
| title_full_unstemmed | Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment |
| title_short | Mechanism of corrosion behavior between Pb-rich phase and Cu-rich structure of high Sn–Pb bronze alloy in neutral salt spray environment |
| title_sort | mechanism of corrosion behavior between pb rich phase and cu rich structure of high sn pb bronze alloy in neutral salt spray environment |
| topic | High Sn–Pb bronze alloy Neutral salt spray test Corrosion behavior Galvanic effect Oxygen concentration cell |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424000681 |
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