Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution
The corrosion behavior was investigated for three Al-Mg aluminum alloys (i.e., 5052, 5083 and 5182 aluminum alloys) with different alloying contents in 3.5 wt.% NaCl solution at 35 °C by means of potentiodynamic polarization, electrochemical impedance spectroscopy, immersion test, X-ray photoelectro...
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MDPI AG
2025-03-01
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| author | Weitao Zhou Fei Xue Moucheng Li |
| author_facet | Weitao Zhou Fei Xue Moucheng Li |
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| description | The corrosion behavior was investigated for three Al-Mg aluminum alloys (i.e., 5052, 5083 and 5182 aluminum alloys) with different alloying contents in 3.5 wt.% NaCl solution at 35 °C by means of potentiodynamic polarization, electrochemical impedance spectroscopy, immersion test, X-ray photoelectron spectroscopy and microscopy techniques. All alloys spontaneously passivate in the test solution, but the pitting corrosion takes place at the intermetallic phases during the long-term immersion test. The comparative analyses indicate that more Mg and less Cr in aluminum alloys result in increases in the passive current density and the pit depth and decreases in the polarization resistance, the pitting potential and the ratio of Al<sub>2</sub>O<sub>3</sub>/Al(OH)<sub>3</sub> in the product film. However, the differences in the pitting potentials of the three aluminum alloys are smaller than approximately 22 mV. Their pit depth values are less than 110 μm after 120 days of immersion. The three aluminum alloys have relatively high corrosion resistance in the simulated seawater solution. |
| format | Article |
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| language | English |
| publishDate | 2025-03-01 |
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| spelling | doaj-art-e01c8e1d6e224a7d84dff921b349a22a2025-08-20T01:49:01ZengMDPI AGMetals2075-47012025-03-0115332710.3390/met15030327Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl SolutionWeitao Zhou0Fei Xue1Moucheng Li2Institute of Materials, School of Materials Science and Engineering, Shanghai University, 149 Yanchang Road, Shanghai 200072, ChinaBaowu Aluminum Technical Center, Baosteel Central Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201999, ChinaInstitute of Materials, School of Materials Science and Engineering, Shanghai University, 149 Yanchang Road, Shanghai 200072, ChinaThe corrosion behavior was investigated for three Al-Mg aluminum alloys (i.e., 5052, 5083 and 5182 aluminum alloys) with different alloying contents in 3.5 wt.% NaCl solution at 35 °C by means of potentiodynamic polarization, electrochemical impedance spectroscopy, immersion test, X-ray photoelectron spectroscopy and microscopy techniques. All alloys spontaneously passivate in the test solution, but the pitting corrosion takes place at the intermetallic phases during the long-term immersion test. The comparative analyses indicate that more Mg and less Cr in aluminum alloys result in increases in the passive current density and the pit depth and decreases in the polarization resistance, the pitting potential and the ratio of Al<sub>2</sub>O<sub>3</sub>/Al(OH)<sub>3</sub> in the product film. However, the differences in the pitting potentials of the three aluminum alloys are smaller than approximately 22 mV. Their pit depth values are less than 110 μm after 120 days of immersion. The three aluminum alloys have relatively high corrosion resistance in the simulated seawater solution.https://www.mdpi.com/2075-4701/15/3/3275XXX series aluminum alloyspitting corrosionalloying elementEIS |
| spellingShingle | Weitao Zhou Fei Xue Moucheng Li Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution Metals 5XXX series aluminum alloys pitting corrosion alloying element EIS |
| title | Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution |
| title_full | Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution |
| title_fullStr | Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution |
| title_full_unstemmed | Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution |
| title_short | Corrosion Behavior of Al-Mg Alloys with Different Alloying Element Contents in 3.5% NaCl Solution |
| title_sort | corrosion behavior of al mg alloys with different alloying element contents in 3 5 nacl solution |
| topic | 5XXX series aluminum alloys pitting corrosion alloying element EIS |
| url | https://www.mdpi.com/2075-4701/15/3/327 |
| work_keys_str_mv | AT weitaozhou corrosionbehaviorofalmgalloyswithdifferentalloyingelementcontentsin35naclsolution AT feixue corrosionbehaviorofalmgalloyswithdifferentalloyingelementcontentsin35naclsolution AT mouchengli corrosionbehaviorofalmgalloyswithdifferentalloyingelementcontentsin35naclsolution |