| GAO Zhi-heng.Corrosion Characteristic and Protection Techniques for Mg Alloys[J],45(3):169-177 |
| Corrosion Characteristic and Protection Techniques for Mg Alloys |
| Received:October 14, 2015 Revised:March 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.03.028 |
| KeyWord:Magnesium alloy Corrosion resistance Corrosion mechanism Surface treatment Organic coating Metal coating |
| Author | Institution |
| GAO Zhi-heng |
Representative Bureau of Naval Equipment Department in Chongqing, Chongqing , China |
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| Abstract: |
| Magnesium alloy is the lightest metallic structural material, and has broad application prospects in automobile, 3C, national defence, aerospace and so on. However, the poor anti-corrosion property has been becoming the bottleneck for its large-scale applications. The corrosion mechanisms of comprehensive corrosion, local corrosion and galvanic corrosion etc. of magnesium alloys are elucidated in the paper. Based on magnesium alloy’s corrosion resistance in different medium,that the main three corrosion factors of magnesium alloys are introduced,we summarized two study direction to improve magnesium alloy’s corrosion resistance:one is to improving magnesium alloy’s Proper corrosion resistance, which is Optimization of alloy composition,improving magnesium alloy’s microstructure,this way is to improving the basis materials. The other way is to use Surface protection treatment technology, by using protective coatings to protect the basis materials, seperate the basis materials and corrosion medium. Purification magnesium alloy’s microstructure、inventing new kings of anti-corrosion magnesium alloy、improving magnesium alloy’s surface microstructure, etc. The ways such as organic polymerization content,metallic compound coating to improve the intrinsical anti-corrosion properties and the present situation of corrosion resistance coatings for magnesium alloys are reviewed in detail. Furthermore, some current existing problems on the corrosion protection technologies of magnesium alloys and the future development orientation are stated briefly． |
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