摘要
采用失重法研究了氢氧化钠溶液中三聚磷酸钠在不同温度和浓度下对铝的缓蚀作用,发现三聚磷酸钠在铝表面上的吸附是产生缓蚀作用的重要原因,且吸附规律服从Langmuir吸附等温式.用Sekine方法处理实验数据,获得了吸附过程相关的重要热力学参数.吸附过程是吸热过程,且熵值增大.随温度升高,吉布斯自由能减少,缓蚀率增大.
The corrosion inhibition of STPP on pure aluminiun in sodium hydroxide was investigated with different temperatures and different concentration of STPP by weight-loss method.It is shown by the result that the adsorption of STPP on the surface of pure aluminium is the important reason resulted from corrosion inhibition and that the rule of adsorption conforms with langmuir’s isotherm.The experimental datum are treated by the Sekine method and the correlative thermodynamics parameters are obtained.The adsorption process is the endothermic process and the entropy is increased with the rapid increasing of the temperature,the Gibbs free energy is steadily decreased and at the same time,the inhibition efficiency is increased.
出处
《高师理科学刊》
2009年第5期69-72,共4页
Journal of Science of Teachers＇College and University
关键词
铝
氢氧化钠
三聚磷酸钠
吸附
缓蚀
pure alminium
sodium hydroxide
STPP
adsorption
corrosioninhibition
