锡酸钠添加剂改善镁合金腐蚀及放电性能的研究  

Improving Corrosion and Discharge Performance of Magnesium Alloy via Sodium Stannate Additive

作　　者：李景营 韦正楠 高中显 LI Jingying;WEI Zhengnan;GAO Zhongxian(Novel Energy Development Center,Shengli Petroleum Administration,Dongying 257000,China;Postdoctoral Scientific Research,Shengli Petroleum Administration,Dongying 257000,China)

机构地区：[1]胜利石油管理局新能源开发中心,山东东营257000 [2]胜利石油管理局博士后科研工作站,山东东营257000

出　　处：《信阳师范学院学报（自然科学版）》2021年第1期93-98,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21805024)。

摘　　要：采用电化学方法探究了不同浓度锡酸钠添加剂对AZ31B镁合金在MgSO 4-Mg(NO 3)2(0.14 mol/L MgSO 4,1.86 mol/L Mg(NO 3)2)电解液中的腐蚀以及电化学放电行为的影响.结果表明,镁合金在含有1 mmol/L锡酸钠添加剂的溶液中具有最大的极化电阻值、最短的滞后时间和最低的电压降.采用电化学阻抗、恒电流放电、线性极化曲线对含有和不含最优浓度锡酸钠添加剂的溶液进行长时间测试,发现在同等浸泡时间内锡酸钠添加剂的引入能够提高镁合金的耐腐蚀能力和放电活性.此外,对浸泡8 d后的两个样品进行扫描电镜,结果表明锡酸钠的加入通过改变镁合金表面形貌来改善镁合金的电化学行为.The electrochemical properties of AZ31B Mg alloy is investigated by electrochemical methods in MgSO 4-Mg(NO 3)2(0.14 mol/L MgSO 4,1.86 mol/L Mg(NO 3)2)electrolyte solution with different Na 2SnO 3 concentrations.The results suggest that AZ31B Mg alloy has the highest polarization resistance,the shortest delayed time and the lowest voltage drop when Na 2SnO 3 concentration is of 1 mmol/L.Moreover,the electrochemical impedance,galvanostatic discharge and linear polarization curves are used to research the effect of Mg electrode in the solution with and without Na 2SnO 3 at different immersion times.It indicates that Na 2SnO 3 can improve the corrosion resistance and discharge activity of Mg alloy at the same testing time.The surface structure and composition of Mg alloy is characterized by using scanning electron microscopy,and the results show that the improved electrochemical behavior of Mg alloy is related to the change of composition of corrosion products.

关 键 词：镁合金 腐蚀 放电性能 锡酸钠添加剂 

分 类 号：TM912[电气工程—电力电子与电力传动]