The results indicate that the samples which is one step pretreated has the best adhesion and the thinnest mesosphere between the coating film and magnesium substrate.

• 结果表明，采用一步法前处理工艺的试样，镀层与基体之间具有良好的结合力，金相显微观察发现镀层与基体之间具有最薄的中间过渡层。