5083铝合金成分优化及耐腐蚀性能研究

Study on Composition Optimization and Corrosion Resistance of 5083 Aluminum Alloy

采用正交试验设计了不同成分的5083铝合金。运用晶间腐蚀、剥落腐蚀、极化曲线测试等研究手段,采用金相光学显微镜(OM)、扫描电子显微镜(SEM)、能谱分析(EDS)等方法,分析了Mn、Zn、Mg、Si等元素对5083铝合金耐腐蚀性能的影响,得出各元素在5083铝合金中的最佳成分范围。结果表明,Mn含量控制在0.5%左右,Si含量不应超过0.2%,Zn含量控制在0.14%左右,Mg含量控制在4.3%左右,其余元素在限度范围内时,5083铝合金的耐腐蚀性能较好。

5083 aluminum alloy with different compositions is designed by orthogonal design method.Research methods such as Intergranular corrosion,exfoliation corrosion,and polarization curve were used.The effects of Mn,Zn,Mg and Si on the corrosion resistance of 5083 aluminum alloy were characterized by metallographic microscope,scanning electron microscope,and energy dispersive spectrometer.And the optimun composition range of each element in 5083 aluminum alloy was obtained.The results show that the Mn content is about 0.5%,the Si content is less than 0.2%,the Zn content is about 0.14%,the Mg content is about 4.3%,and remain elements within the composition range,the corrosion resistance of 5083 aluminum alloy is better.