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This study used the salt spray test (SST) method to analyze the corrosion reaction of friction stir welded (FSW) alloys that are different from each other, including AA5052-H32 and AA6061-T6. To understand the overall and specific corrosion behaviour of the parent metals (PMs) and the FSW joints, the SST was carried out. The findings demonstrate that the microstructure of the various zones of the FSW joint varied noticeably, which in part influenced how each zone corroded in NaCl solution. The study determined the weight reduction and degradation rate of the stir zone relative to the PMs in the welded sample.