Cathodic electrodeposition (CED) was used to coat the cast magnesium alloy Mg-9Al-1Zn-xRE with aluminum powder and epoxy. Immersion and salt spray tests (ASTM B117) at room temperature for a total of 240 hours have been performed to assess the corrosion performances of AZ91D magnesium alloy. At each 24-hour interval, the samples were checked for any damage or deterioration of the coating surface morphology. The X-ray diffraction (XRD) analysis confirmed the phases, and scanning electron microscopy (SEM) with EDS analysis confirmed the phase composition. The electrochemical results show that CED epoxy coatings have superior adhesiveness and corrosion resistance compared to powder-coated aluminum and cast magnesium. The salt spray and immersion test results also confirm that CED epoxy coating exhibits good corrosion resistance.

中文翻译：

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采用盐雾试验、浸没试验和电化学试验研究粉末涂层铝和 CED Mg Mg-Al-Zn-RE 铸造合金的腐蚀行为

阴极电沉积 (CED) 用于用铝粉和环氧树脂涂覆铸造镁合金 Mg-9Al-1Zn-xRE。已经在室温下进行了总共 240 小时的浸泡和盐雾试验 (ASTM B117)，以评估 AZ91D 镁合金的腐蚀性能。每隔 24 小时，检查样品的涂层表面形态是否有任何损坏或恶化。X 射线衍射 (XRD) 分析证实了这些相，扫描电子显微镜 (SEM) 与 EDS 分析证实了相组成。电化学结果表明，与粉末涂层铝和铸镁相比，CED 环氧涂层具有优异的粘附性和耐腐蚀性。盐雾和浸泡试验结果也证实了CED环氧涂层具有良好的耐腐蚀性。