温度对锆合金酸洗反应动力学行为影响

Effect of Temperature on Pickling Reaction Kinetics of Zirconium Alloy

采用浸泡酸洗法研究温度对锆合金酸洗速率影响,并分析锆合金酸洗释热系数。结果表明:温度对酸洗速率具有指数影响关系;在20~60℃温度范围内,每增加10℃,酸洗速率提高2.0~2.5倍,锆合金酸洗频率因子和反应活化能约为1.18×10^(12)和70 k J/mol。锆合金酸洗为放热反应,酸洗中伴随温度升高,其释热系数约为760 k J/mol。

The effect of temperature on pickling rate of zirconium alloy and the heat release constant was studied in this paper by soaked method. The results show that temperature has exponential effect on pickling rate of zirconium alloy, the rate increases 2.0 ~ 2.5 times 10℃ at 20 ~ 60℃. The pickling frequency factor is about 1.18 × 10^12 and the activation energy is about 70kJ/mol. The pickling reaction of zirconium alloy is exothermic. The reaction temperature increases with the pickling process in which the heat release constant is 760 kJ/mol.