A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution
The corrosion behavior of Mg, AZ31 and AZ91 has been evaluated in 3.5% NaCl solution using weight loss, electrochemical polarization and impedance measurements. Corrosion rate derived from the weight losses demonstrated the occurrence of steeply fast corrosion reaction on AZ91 alloy after three hour...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2015-06-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221395671500016X |
| _version_ | 1797205404404416512 |
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| author | I.B. Singh M. Singh S. Das |
| author_facet | I.B. Singh M. Singh S. Das |
| author_sort | I.B. Singh |
| collection | DOAJ |
| description | The corrosion behavior of Mg, AZ31 and AZ91 has been evaluated in 3.5% NaCl solution using weight loss, electrochemical polarization and impedance measurements. Corrosion rate derived from the weight losses demonstrated the occurrence of steeply fast corrosion reaction on AZ91 alloy after three hours of immersion, indicating the start of galvanic corrosion. An increase of corrosion rate with immersion time was also observed for AZ31 but with lesser extent than AZ91 alloy. Whereas Mg metals showed a decrease of corrosion rate with immersion time, suggesting the formation of a protective layer on their surfaces. In contrast, the corrosion current density (Icorr) derived from the Tafel plots, exhibited their corrosion resistances in order of Mg > AZ91 > AZ31. Electrochemical charge transfer resistance (Rct) and double layer capacitance measured by electrochemical impedance spectroscopy (EIS), are well in accordance with the measured Icorr. EIS measurements with time and microstructural examination of the corroded and uncorroded samples are helpful in elucidation of results measured by electrochemical polarization. |
| first_indexed | 2024-04-24T08:50:35Z |
| format | Article |
| id | doaj.art-0b663d1b6aaf4e438c3f2c63f8f52923 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:50:35Z |
| publishDate | 2015-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-0b663d1b6aaf4e438c3f2c63f8f529232024-04-16T11:54:32ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672015-06-013214214810.1016/j.jma.2015.02.004A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solutionI.B. SinghM. SinghS. DasThe corrosion behavior of Mg, AZ31 and AZ91 has been evaluated in 3.5% NaCl solution using weight loss, electrochemical polarization and impedance measurements. Corrosion rate derived from the weight losses demonstrated the occurrence of steeply fast corrosion reaction on AZ91 alloy after three hours of immersion, indicating the start of galvanic corrosion. An increase of corrosion rate with immersion time was also observed for AZ31 but with lesser extent than AZ91 alloy. Whereas Mg metals showed a decrease of corrosion rate with immersion time, suggesting the formation of a protective layer on their surfaces. In contrast, the corrosion current density (Icorr) derived from the Tafel plots, exhibited their corrosion resistances in order of Mg > AZ91 > AZ31. Electrochemical charge transfer resistance (Rct) and double layer capacitance measured by electrochemical impedance spectroscopy (EIS), are well in accordance with the measured Icorr. EIS measurements with time and microstructural examination of the corroded and uncorroded samples are helpful in elucidation of results measured by electrochemical polarization.http://www.sciencedirect.com/science/article/pii/S221395671500016XMg and alloysWeight lossElectrochemical measurementsSEM |
| spellingShingle | I.B. Singh M. Singh S. Das A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution Journal of Magnesium and Alloys Mg and alloys Weight loss Electrochemical measurements SEM |
| title | A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution |
| title_full | A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution |
| title_fullStr | A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution |
| title_full_unstemmed | A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution |
| title_short | A comparative corrosion behavior of Mg, AZ31 and AZ91 alloys in 3.5% NaCl solution |
| title_sort | comparative corrosion behavior of mg az31 and az91 alloys in 3 5 nacl solution |
| topic | Mg and alloys Weight loss Electrochemical measurements SEM |
| url | http://www.sciencedirect.com/science/article/pii/S221395671500016X |
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