锌铝层状双金属氢氧化物焙烧物对钢筋的缓蚀作用研究  

Multifunctional Corrosion Inhibition Behavior of Zn-Al Calcined Layered Double Hydroxides for Steel Rebar in NaCl Solution

作　　者：张小娟[1] 王静静[1] 董士刚[2] 林昌健[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系,福建厦门361005 [2]厦门大学能源研究院,福建厦门361100

出　　处：《电化学》2013年第3期256-261,共6页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.21203158;No.50731004)资助

摘　　要：在空气气氛下合成了锌铝层状双金属氢氧化物(Zn-Al LDHs)和焙烧物(Zn-Al CLDHs),扫描电镜结果表明,所制得的双金属氢氧化物具有明显的层状结构.文中研究了Zn-Al CLDHs对钢筋的腐蚀保护效果,Zn-Al CLDHs固体在NaCl溶液中浸泡处理3 h后,钢筋的腐蚀速率显著降低.实验证明,Zn-Al CLDHs在结构重组过程中可吸收溶液中的Cl-,同时释放出OH-,改善腐蚀环境,有效抑制钢筋的腐蚀.The Zn-Al layered double hydroxides（Zn-Al LDHs） and calcined products（Zn-Al CLDHs） were synthesized successfully under a routine air atmosphere.The results showed that both Zn-Al LDHs and Zn-Al CLDHs had obvious flake structures.The corrosion inhibition of Zn-Al CLDHs for steel rebar in NaCl solution was studied by electrochemical techniques.It was found that the corrosion rate of steel rebar decreased significantly after the steel rebar was treated by Zn-Al CLDHs in NaCl solution for 3 h.It was indicated that Zn-Al CLDHs could absorb Cl-and release OH-during their reconstruction process,which provided dual protection for the steel rebar.

关 键 词：钢筋 腐蚀 双金属氢氧化物 缓蚀剂 

分 类 号：TG174.3[金属学及工艺—金属表面处理]