Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere
Magnesium and its alloys have the advantages of high specific strength and specific stiffness, excellent thermal conductivity and vibration damping performance. However, due to their low corrosion potential and loose corrosion product film, the corrosion resistance of Mg alloys is poor, which seriou...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001462 |
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| author | S.Y. Liu K. Tang G.J. Liu Z.H. Liu X.Y. Lang Y.F. Zhu Q. Jiang |
| author_facet | S.Y. Liu K. Tang G.J. Liu Z.H. Liu X.Y. Lang Y.F. Zhu Q. Jiang |
| author_sort | S.Y. Liu |
| collection | DOAJ |
| description | Magnesium and its alloys have the advantages of high specific strength and specific stiffness, excellent thermal conductivity and vibration damping performance. However, due to their low corrosion potential and loose corrosion product film, the corrosion resistance of Mg alloys is poor, which seriously limits their utilization scope. In this paper, the corrosion resistance (CR) of AM60 alloy is investigated by adding 2.0 wt% Ca with subsequent thermal oxidation and Carbonation (TOC) at 400 °C for 15 h with different O₂/CO₂ ratios. Electrochemical impedance spectra and cross-sectional corrosion analysis reveal that the CR is much improved with the optimal O₂/CO₂ ratio of 1:3. This enhancement is attributed to the formation of a high-quality dual-layer protective structure, consisting of an outer MgCO₃/CaCO₃ composite layer and an inner MgO/CaO/Al₂O₃ composite layer. This protective film effectively mitigates micro-galvanic corrosion and provides resistance against Cl⁻ attack, contributing to the alloy's superior corrosion performance. |
| format | Article |
| id | doaj-art-1d87990b6b43406987794aafde062454 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1d87990b6b43406987794aafde0624542025-01-24T04:45:18ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013516901702Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphereS.Y. Liu0K. Tang1G.J. Liu2Z.H. Liu3X.Y. Lang4Y.F. Zhu5Q. Jiang6Key Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, ChinaChina National Intellectual Property Administration, Xitucheng Road, Beijing, 100080, ChinaKey Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, ChinaKey Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, China; Corresponding author.liuzhihui@jlu.edu.cnKey Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, ChinaKey Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, China; Corresponding author.Key Laboratory of Automobile Materials, Ministry of Education (Jilin University), School of Materials Science and Engineering, Jilin University, 5988# Renmin Street, Changchun, 130022, ChinaMagnesium and its alloys have the advantages of high specific strength and specific stiffness, excellent thermal conductivity and vibration damping performance. However, due to their low corrosion potential and loose corrosion product film, the corrosion resistance of Mg alloys is poor, which seriously limits their utilization scope. In this paper, the corrosion resistance (CR) of AM60 alloy is investigated by adding 2.0 wt% Ca with subsequent thermal oxidation and Carbonation (TOC) at 400 °C for 15 h with different O₂/CO₂ ratios. Electrochemical impedance spectra and cross-sectional corrosion analysis reveal that the CR is much improved with the optimal O₂/CO₂ ratio of 1:3. This enhancement is attributed to the formation of a high-quality dual-layer protective structure, consisting of an outer MgCO₃/CaCO₃ composite layer and an inner MgO/CaO/Al₂O₃ composite layer. This protective film effectively mitigates micro-galvanic corrosion and provides resistance against Cl⁻ attack, contributing to the alloy's superior corrosion performance.http://www.sciencedirect.com/science/article/pii/S2238785425001462Corrosion resistanceComposite filmMagnesium alloysThermal oxidation and carbonization |
| spellingShingle | S.Y. Liu K. Tang G.J. Liu Z.H. Liu X.Y. Lang Y.F. Zhu Q. Jiang Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere Journal of Materials Research and Technology Corrosion resistance Composite film Magnesium alloys Thermal oxidation and carbonization |
| title | Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere |
| title_full | Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere |
| title_fullStr | Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere |
| title_full_unstemmed | Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere |
| title_short | Enhanced corrosion resistance of AM60 alloy with 2.0Ca via thermal oxidation and carbonization under an O₂/CO₂ atmosphere |
| title_sort | enhanced corrosion resistance of am60 alloy with 2 0ca via thermal oxidation and carbonization under an o₂ co₂ atmosphere |
| topic | Corrosion resistance Composite film Magnesium alloys Thermal oxidation and carbonization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001462 |
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