Two electroplating processes for Mg alloy motorcycle parts were developed based on self-developed pretreatment methods. The process flow is as follows: mechanical polishing—dewaxing—chemical degreasing—pickling with CrO3 and HNO3—activating with hydrofluoric acid—electroless Ni plating—pyrophosphate Cu plating— Cu/Ni/Cr plating for AZ91D parts with complicated shape (such as engine case), and mechanical polishing—dewaxing—chemical degreasing—one-step pickling/ activating—Zn immersion—Ni pre-plating—pyrophos...
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