NaCl溶液中无机缓蚀剂Na_2CO_3对AZ91D镁合金的缓蚀行为  

Corrosion Inhibition Performance of Sodium Carbonate for AZ91D Magnesium Alloy in Aqueous Sodium Chloride Solution

作　　者：关景鑫 贾素秋[1] 邱敬东 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《材料保护》2013年第12期24-26,7,共3页Materials Protection

基　　金：吉林省自然基金项目(20110410);吉林省教育厅"十二五"科学技术研究项目(2011097);吉林大学汽车材料教育部重点实验室开放基金(No.11-45006044534)资助

摘　　要：将AZ91D镁合金浸入含Na2CO3缓蚀剂的NaCl溶液,通过扫描电镜比较不同Na2CO3浓度下的镁合金腐蚀形貌,利用失重法测量镁合金的腐蚀速率,测量含不同浓度Na2CO3溶液中镁合金的动电位极化曲线和交流阻抗谱,并分析其腐蚀行为。结果表明:随着Na2CO3浓度的增加,缓蚀效果得到加强,Na2CO3是一种阳极型缓蚀剂,能有效地减缓镁合金的腐蚀。AZ91D magnesium alloy was immersed in aqueous NaCl solutions containing Na 2 CO 3 inhibitor.The corroded surface morphology of Mg alloy immersed in NaCl solution containing different concentrations of Na 2 CO 3 was compared with a scanning electron microscope,and the corrosion rate of the Mg alloy was determined by weight loss method.Moreover,the potentiodyna-mic polarization curves and electrochemical impedance spectra of the Mg alloy in NaCl solution containing different concentrations of Na 2 CO 3 were measured by electrochemical method,and the corrosion behavior of the Mg alloy was analyzed.Results indicated that the inhibition efficiency of Na 2 CO 3 increased with increasing concentration.Besides,Na 2 CO 3 acted as an anodic inhibitor and could effectively inhibit the corrosion of AZ91D magnesium alloy in aqueous NaCl solution.

关 键 词：NA2CO3 缓蚀行为 AZ91D镁合金 腐蚀速率 极化曲线 交流阻抗谱 

分 类 号：TG174.42[金属学及工艺—金属表面处理]