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| Study on Corrosion Behavior of Lithium Welded Aluminum Alloy in Atmospheric |
| Received:November 22, 2016 Revised:March 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.03.010 |
| KeyWord:friction stir welding pitting corrosion stress corrosion |
| Author | Institution |
| LI Zhong-dong |
Navy Aviation Military Representative Office in Shenyang Area, Shenyang , China |
| ZHANG Yong |
Qingdao Branch of Naval Aeronautical Engineering Academy, Qingdao , China |
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| Abstract: |
| Objective Research on lithium aluminium alloy friction stir weld in the corrosion behavior of atmospheric environment. Methods The electrochemical polarization method, weight loss method, , Scanning Electron Microscopy and microscope were conducted applied to researchto corrosion behaviors of fricitionfriction stir welding joint of aluminum lithium alloylithium welded aluminum alloy after friction stir welding in simulated marine atmosphere with the help of self-design equipment. Results Results showed that Serious stress corrosion cracking phenomenon was observed in the weld jointseam, which lead corrosion potential negative shifted about 0.05 V relative to other partsthe base. Meanwhile, the corrosion rate increased significantly. Conclusion Although friction stir welding haves been applied in many other fields already for some advantages, there are were obvious defects in the application of the Navy aircraft. It cannot be used directly in an exposed way. when it was exposed to use. |
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