中文摘要：

用干湿循环增重法、极化实验研究了Al含量对Mn-Cu基阻尼合金在0.5%NaCl溶液中耐腐蚀性能的影响,并利用SEM、EDS、XRD等手段对Al元素的影响机理进行了分析。结果表明,Al元素的添加使材料的自腐蚀电位（Ecorr）提高,腐蚀电流密度（Icorr）降低,合金的耐蚀性增加;另一方面,含Al元素的Mn-Cu合金腐蚀产物中Al2O3与Cu2O、Mn3O4、Mn2O3协同作用,使腐蚀层结构致密化,有效阻碍了Cl-向基体的扩散,使材料的耐腐蚀性能提高。

英文摘要：

Corrosion behavior of Mn-Cu damping alloy with different A1 addition in 0. 5% NaC1 solution was studied by dry-wet cycle test and electrochemical method. Mechanism of A1 on the corrosion resistance was ana- lyzed by SEM, EDS and XRD. Results show that , with the increase of AI content, the self corrosion potential （E ） increased and the corrosion current density （I ） declined; on the other hand, in the Mn-Cu alloys with AI addition, a film of Cuz O, Mn3 04 , Mn20a and A12 （）a was formed. Those corrosion products played synergetic effect to make the film fine, thus inhabiting the diffusion of C1- into interior and decreasing the corrosion speed.