羧甲基壳聚糖在酸性溶液中对铝的缓蚀作用  

Inhibition of Carboxymenthylchitosan to Corrosion of Aluminum in Acidic Solution

作　　者：陈德英[1] 尹衍升 程莎[1] 陈守刚[1] 刘通[1] 

机构地区：[1]中国海洋大学材料科学与工程研究院,山东青岛266100

出　　处：《材料开发与应用》2009年第2期55-59,共5页Development and Application of Materials

基　　金：国家自然科学基金项目(50672090)

摘　　要：羧甲基壳聚糖是一种环境友好的重要衍生物,采用失重及电化学方法(EIS)研究了羧甲基壳聚糖(CM-chitosan)在1mol/L HCl溶液中对铝(2024)的缓蚀作用。失重和电化学测试均表明,当羧甲基壳聚糖浓度达到200mg/L时缓蚀效率最高,可达88.54%。进一步的拟合计算表明,羧甲基壳聚糖在铝表面的吸附基本遵循修正的Langmuir吸附等温式,并获得上述吸附过程的热力学参数ΔG0、ΔH0和ΔS0。Carboxymenthylchitosan （CM-chitosan） is an important and friendly environmental derivative. Inhibition of carboxy-menthylehitosan the corrosion of aluminum in 1 mol/L HCl was investigated with gravimetric and electrochenical tests. The results reveal that this compound is a very good inhibitor and behaves better in 1 mol/L HCl solutions ,and the highest efficiency of 88.54% is achieved when the concentration of the CM-chitosan is 200mg/L. In lmol/L HC1 solutions, the adsorption of CM-chitosan on the aluminum surface follows a modified Langmuir adsorption isotherm and some important thermodynamic parameters △Go,△Ho and △So are abtained.

关 键 词：缓蚀剂 羧甲基壳聚糖 铝 吸附 

分 类 号：TG174.42[金属学及工艺—金属表面处理]