稀土盐Nd(NO_(3))_(3)对1060铝在HCl介质中的缓蚀作用  

Corrosion Inhibition of Rare Earth Salt of Nd(NO_(3))_(3)to 1060 Aluminum in HCl Medium

作　　者：黄苗 王丽姿 李向红 HUANG Miao;WANG Lizi;LI Xianghong(College of Chemical Engineering,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学化学工程学院,昆明650224

出　　处：《腐蚀与防护》2022年第1期8-13,共6页Corrosion & Protection

基　　金：云南省农业基础研究联合专项重点项目(2017FG001-004);云南省中青年学术和技术带头人培养项目(2015HB049);云南省万人计划“青年拔尖人才”专项(51900109)。

摘　　要：通过极化曲线法和电化学阻抗谱法测试了稀土盐Nd(NO_(3))_(3)在25℃的1.0 mol/L HCl溶液中对1060铝的缓蚀性能。并借助扫描电子显微镜(SEM)和原子力显微镜(AFM)表征了腐蚀前后铝表面的微观结构特征。结果表明:Nd(NO_(3))_(3)能有效抑制铝在HCl溶液中的腐蚀,缓蚀率随着Nd(NO_(3))_(3)含量的增加而升高,当Nd(NO_(3))_(3)质量浓度为500 mg/L时用极化曲线法测得的缓蚀率高达96.9%,用电化学阻抗谱法测得的缓蚀率达88.6%;Nd(NO_(3))_(3)主要抑制了阴极反应,为阴极抑制型缓蚀剂;添加500 mg/L Nd(NO_(3))_(3)可使铝表面的腐蚀程度急剧下降,表现出良好的缓蚀性能。The corrosion inhibition of rare earth salt of Nd(NO_(3))_(3) to 1060 aluminum in 1.0 mol/L HCl solution at 25℃was studied by polarization curve method and electrochemical impedance spectroscopy(EIS)method.Scanning electron microscopy(SEM)and atomic force microscopy(AFM)were used to characterize the microstructure of the aluminum surface before and after corrosion.The results show that Nd(NO_(3))_(3) could efficiently retard the corrosion of aluminum in HCl solution.And the inhibition efficiency increased with the increase of Nd(NO_(3))_(3) content.The inhibition efficiency could hit 96.9%by polarization curve method and 88.6%by EIS method when the mass concentration of Nd(NO_(3))_(3) was 500 mg/L.Nd(NO_(3))_(3) mainly retarded cathodic reaction,so it was a cathodic inhibitor.Adding 500 mg/L Nd(NO_(3))_(3) could sharply reduce the corrosion degree of aluminum surface,showing good corrosion inhibition performance.

关 键 词：稀土 硝酸钕 盐酸 铝 缓蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]