利用强流脉冲电子束对镁合金AZ31表面进行快速铝合金化处理.分析表面合金化层的显微结构,测量铝合金化前、后镁合金AZ31样品在5%NaCI溶液中的腐蚀性能.测试结果表明,AZ31样品表面约10μm层深范围内的A1元素含量有所增加,合金化层的晶粒细化,加入的A1元素以固溶形式存在.表层铝元素的添加可提高镁合金AZ31的耐蚀性.原始样品自腐蚀电位为-1231mV,极化电阻为0.4531kΩ·cm2,铝合金化样品的自腐蚀电位提高到-669.1 mV,对应极化电阻增加到2.202 kΩ·cm2,较原始样品的极化电阻提高近5倍.
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