AZ31B镁合金在模拟流动海水中的腐蚀行为  

Corrosion behavior of AZ31B magnesium alloy in simulated flowing seawater

作　　者：杨子梅[1] 卫英慧[1,2] 王宁[1] 李永刚[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]吕梁学院材料系,山西吕梁033000

出　　处：《金属热处理》2015年第2期107-110,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(51001079;21201129;51374151);高等学校博士点专项科研基金(20091402110010);中国博士后科学基金(20100471586);山西省自然科学基金(2011011020-2;2010021023-1)

摘　　要：利用质量损失法及X射线衍射(XRD)、扫描电镜(SEM)测试手段研究了铸态和挤压态AZ31B镁合金在模拟流动海水中浸泡12 h的腐蚀行为及随流速变化的规律。结果表明,AZ31B铸态镁合金试样的耐蚀性要远大于挤压态试样,且二者的腐蚀速率随搅拌速度增加的变化趋势有所不同:铸态试样的腐蚀速率随搅拌速度的增加近似呈线性上升,而挤压态试样的腐蚀速率随搅拌速度的增加而先增大后下降。Corrosion behaviors of AZ31B as-cast magnesium alloy sample and its extrusion sample exposed to simulated flowing seawater for 12 h with different stirring speeds were investigated by means of mass loss. X-ray diffraction （XRD） and scanning electron microscopy （SEM） were used to characterize corrosion behaviors of the AZ31B magnesium alloy. The results show that AZ31B as-cast magnesium alloy sample exhibits better corrosion resistance than the extruded sample. Corrosion rate variation of the two samples with the increase of stirring speed shows that the as-cast sample linearly increases with the stirring speed, but the as-extruded one increases first and then decreases.

关 键 词：AZ31B镁合金 腐蚀 模拟流动海水 

分 类 号：TG172.5[金属学及工艺—金属表面处理]