Al元素对Mn-Cu基阻尼合金耐蚀性能的影响
张颖;李宁;颜家振;傅旭
【期刊名称】《功能材料》 【年(卷),期】2013(044)0z1
【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.%Corrosion behavior of Mn-Cu damping alloy with different Al addition in 0.5％ NaCl solution was studied by dry-wet cycle test and electrochemical method.Mechanism of Al on the corrosion resistance was analyzed by SEM,EDS and XRD.Results show that,with the increase of Al content,the self-corrosion potential (Ecorr) increased and the corrosion current density (Icorr) declined; on the other hand,in the Mn-Cu alloys with Al addition,a film of Cu2O,Mn3O4,Mn2O3 and Al2O3 was formed.Those corrosion products played synergetic effect to make the film fine,thus inhabiting the diffusion of Cl-into interior and decreasing the corrosion speed.
【总页数】4页(102-104,107)
【关键词】Mn-Cu基阻尼合金;Al元素;耐腐蚀性;微观结构;氧化产物
Al元素对Mn-Cu基阻尼合金耐蚀性能的影响
