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Effect of creep-aging processing on corrosion resistance of an Al–Zn–Mg–Cu alloy
Highlights Corrosion resistance of Al–Zn–Mg–Cu alloy is sensitive to creep-aging processing. The increase of applied stress can enhance the corrosion resistance. The increased temperature first increases and then decreases corrosion resistance. Discontinuous GB precipitate and narrow PFZ improve can corrosion resistance.
Abstract Creep-aging forming, combining both the aging treatment and forming process, has recently drawn much attention of researchers. In this study, the effects of creep-aging processing on the corrosion resistance of an Al–Zn–Mg–Cu alloy are studied. Results show that the corrosion resistance of the studied Al–Zn–Mg–Cu alloy is sensitive to creep-aging processing parameters (creep-aging temperature and applied stress). With the increase of creep-aging temperature, the corrosion resistance first increases and then decreases. Increasing the applied stress can deteriorate the electrochemical corrosion resistance and improve the exfoliation corrosion resistance. The creep-aging processing can change the size and distribution of precipitates in the aluminum matrix, which significantly affects the corrosion resistance. The discontinuous grain boundary precipitates and narrow precipitate-free zones can enhance the corrosion resistance.
Effect of creep-aging processing on corrosion resistance of an Al–Zn–Mg–Cu alloy
Highlights Corrosion resistance of Al–Zn–Mg–Cu alloy is sensitive to creep-aging processing. The increase of applied stress can enhance the corrosion resistance. The increased temperature first increases and then decreases corrosion resistance. Discontinuous GB precipitate and narrow PFZ improve can corrosion resistance.
Abstract Creep-aging forming, combining both the aging treatment and forming process, has recently drawn much attention of researchers. In this study, the effects of creep-aging processing on the corrosion resistance of an Al–Zn–Mg–Cu alloy are studied. Results show that the corrosion resistance of the studied Al–Zn–Mg–Cu alloy is sensitive to creep-aging processing parameters (creep-aging temperature and applied stress). With the increase of creep-aging temperature, the corrosion resistance first increases and then decreases. Increasing the applied stress can deteriorate the electrochemical corrosion resistance and improve the exfoliation corrosion resistance. The creep-aging processing can change the size and distribution of precipitates in the aluminum matrix, which significantly affects the corrosion resistance. The discontinuous grain boundary precipitates and narrow precipitate-free zones can enhance the corrosion resistance.
Effect of creep-aging processing on corrosion resistance of an Al–Zn–Mg–Cu alloy
Lin, Y.C. (author) / Jiang, Yu-Qiang (author) / Zhang, Xian-Cheng (author) / Deng, Jiao (author) / Chen, Xiao-Min (author)
2014-04-18
11 pages
Article (Journal)
Electronic Resource
English
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