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| Corrosion Behavior of 7A52 Aluminum Alloy Plasma Arc Welding Joint in Salt Water Spray |
| Received:March 05, 2018 Revised:June 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.06.012 |
| KeyWord:7A52 aluminum alloy welding joint salt water spray pitting corrosion |
| Author | Institution |
| LYU Yao-hui |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| LIU Yu-xin |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| WEI Shi-cheng |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| HE Dong-yu |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| WANG Yu-jiang |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| LIANG Yi |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| GUO Lei |
National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing , China |
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| Abstract: |
| Objective To study corrosion behaviors and rules of 7A52 aluminum alloy plasma arc welding joint in simulation of marine atmosphere environment. Methods The corrosion tests were carried out with salt water spray test. And then the surface morphologies were observed by scanning electron microscopy (SEM), the effect of corrosion time on corrosion behavior was discussed. The distribution of element of corrosion products were analyzed by EDS. Results Pitting corrosion was main morphology in the heat affected zone in the initial stage (8 h), pitting corrosion occurred in matrix and weld joint with time (12 h). The content of oxygen in the corrosion products of the heat affected zone was the most. Conclusion The heat affected zone of the 7A52 aluminum alloy is a sensitive area of corrosion. The corrosion resistance of heat affected zone is slightly worse than that of the matrix and the welding seam. |
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