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为了对重要的反应堆材料锆合金耐腐蚀性能进行评价 ,测量了不同热处理条件下 Zr- 4合金电化学动力学曲线 ,以研究退火温度、时间 ,以及淬火过程的冷却速度等对锆合金钝化电流密度的影响。实验结果表明 :淬火样品的钝化电流密度小于未淬火样品的电流密度 ;随着退火温度的升高或退火时间的增长 ,钝化电流密度增大 ;淬火过程中冷却速度越快 ,钝化电流密度越小。因此 ,适当地控制热处理影响因素 ,对于降低钝化电流密度、改善锆合金的抗腐蚀性能 ,有着十分重要的意义
In order to evaluate the corrosion resistance of zirconium alloy, the electrochemical kinetics curves of Zr-4 alloy under different heat treatment conditions were studied in order to study the effects of annealing temperature and time, as well as the cooling rate of quenching process on the passivation current of zirconium alloy The impact of density. The experimental results show that the passivated current density of quenched samples is smaller than the current density of unquenched samples. The passivated current density increases with the increase of annealing temperature or annealing time. The cooling rate of quenching is faster and the passivation current The smaller density. Therefore, proper control of the influencing factors of heat treatment is of great significance for reducing the passivation current density and improving the corrosion resistance of zirconium alloys