铝在氢氧化钠溶液中的腐蚀动力学行为

Kinetics of corrosion action of aluminum in sodium hydroxide solution

在高效率转化腔的制备过程中,使用氢氧化钠溶液去除铝芯轴是最关键的步骤之一。为掌握铝在氢氧化钠溶液的腐蚀行为,采用失重法,研究铝在30℃条件下,1～5mol/L的氢氧化钠溶液中的动力学行为;以及在3mol/L的氢氧化钠溶液中,30～50℃条件下的氢氧化钠溶液中的动力学行为。对数据进行拟合和经验公式处理,求出各动力学参数(反应级数,速率常数,表观活化能、指前因子),并通过X射线衍射仪对其产物进行分析。

In fabrication of high conversion efficiency hohlraums, one of the most important steps is using sodium hydroxide solution to etch away the aluminum mandrel. In order to grip the corrosion action of aluminum in sodium hydroxide solution, we use weight loss method to investigate the corrosion action of aluminum in 1 5 mol/L sodium hydroxide solution at 30℃ and that in 3 mol/L sodium hydroxide solution in the condition of 30-50℃ Through disposing the experiment data by experience formula, we obtain the kinetic parameters, i.e. reaction rate constant, order of reaction, apparent activation energy, and pre exponential factor. Moreover, the reaction products are analyzed by means of X-ray diffraction.