羧甲基壳聚糖在酸性溶液中对铝的缓蚀作用

基金项目:

国家自然科学基金项目（50672090）。

详细信息

Inhibition of Carboxymenthylchitosan to Corrosion of Aluminum in Acidic Solution

Institute of Materials Science and Technology, Ocean University of China, Qingdao 266100, China

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。
- 缓蚀剂 /
- 羧甲基壳聚糖 /
- 铝 /
- 吸附
Abstract: Carboxymenthylchitosan(CM-chitosan) is an important and friendly environmental derivative.Inhibition of carboxymenthylchitosan 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 1mol/L HCl solutions,the adsorption of CM-chitosan on the aluminum surface follows a modified Langmuir adsorption isotherm and some important thermodynamic parameters ΔGo,ΔHo and ΔSo are abtained.
- Corrosion inhibitor /
- Carboxymenthylchitosan /
- Aluminum /
- Adsorption