Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution
Magnesium alloys are more widely used at higher temperatures. However, it is not well known whether oxide layer, produced at high temperature, could show corrosion protection. Thus, the corrosion behaviors of oxidized AZW800 alloy were investigated by hydrogen evolution and electrochemical measureme...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-05-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721002309 |
| _version_ | 1797792615740997632 |
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| author | Chunlong Cheng Qichi Le Liang Chen Wenxin Hu Tong Wang Baosong Zhu Xiong Zhou |
| author_facet | Chunlong Cheng Qichi Le Liang Chen Wenxin Hu Tong Wang Baosong Zhu Xiong Zhou |
| author_sort | Chunlong Cheng |
| collection | DOAJ |
| description | Magnesium alloys are more widely used at higher temperatures. However, it is not well known whether oxide layer, produced at high temperature, could show corrosion protection. Thus, the corrosion behaviors of oxidized AZW800 alloy were investigated by hydrogen evolution and electrochemical measurements to evaluate effect of oxide layer on corrosion resistance. The results showed that corrosion of removed oxide layer AZW800 alloy showed characteristic of localized corrosion, leaving randomly bulky pits. While reserved oxide layer AZW800 alloy exhibited a relatively uniform corrosion. The results indicated that oxide layer could hinder corrosion of oxidized AZW800 alloy in the initial period of immersion. While subsequently, aggravated corrosion would occur owing to defects of oxide layer and less protective products film. Besides, present of oxide layer eliminated micro-galvanic couple on alloy surface. The synergistic effect of elimination of micro-galvanic couple on alloy surface and alkalization effect transforms localized corrosion into relatively uniform corrosion of alloys. |
| first_indexed | 2024-03-13T02:36:34Z |
| format | Article |
| id | doaj.art-abf5943015cc4199bc2186e352aaf5ba |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-03-13T02:36:34Z |
| publishDate | 2023-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-abf5943015cc4199bc2186e352aaf5ba2023-06-29T04:14:19ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-05-0111517401753Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solutionChunlong Cheng0Qichi Le1Liang Chen2Wenxin Hu3Tong Wang4Baosong Zhu5Xiong Zhou6Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China; Corresponding author.Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaBaotou Research Institute of Rare Earths, Baotou 014000, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaMagnesium alloys are more widely used at higher temperatures. However, it is not well known whether oxide layer, produced at high temperature, could show corrosion protection. Thus, the corrosion behaviors of oxidized AZW800 alloy were investigated by hydrogen evolution and electrochemical measurements to evaluate effect of oxide layer on corrosion resistance. The results showed that corrosion of removed oxide layer AZW800 alloy showed characteristic of localized corrosion, leaving randomly bulky pits. While reserved oxide layer AZW800 alloy exhibited a relatively uniform corrosion. The results indicated that oxide layer could hinder corrosion of oxidized AZW800 alloy in the initial period of immersion. While subsequently, aggravated corrosion would occur owing to defects of oxide layer and less protective products film. Besides, present of oxide layer eliminated micro-galvanic couple on alloy surface. The synergistic effect of elimination of micro-galvanic couple on alloy surface and alkalization effect transforms localized corrosion into relatively uniform corrosion of alloys.http://www.sciencedirect.com/science/article/pii/S2213956721002309AZW800Corrosion behaviorOxide layerEIS |
| spellingShingle | Chunlong Cheng Qichi Le Liang Chen Wenxin Hu Tong Wang Baosong Zhu Xiong Zhou Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution Journal of Magnesium and Alloys AZW800 Corrosion behavior Oxide layer EIS |
| title | Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution |
| title_full | Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution |
| title_fullStr | Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution |
| title_full_unstemmed | Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution |
| title_short | Understanding on corrosion mechanism of oxidized AZW800 alloy in 3.5 wt% NaCl solution |
| title_sort | understanding on corrosion mechanism of oxidized azw800 alloy in 3 5 wt nacl solution |
| topic | AZW800 Corrosion behavior Oxide layer EIS |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721002309 |
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