反应堆A0纯铝的点蚀模拟

Simulating of Pit Corrosion of A0 Pure Aluminum Pool Shell

摘要:

测量A0纯铝在去离子水中的极化曲线用来模拟反应堆池壳的点蚀.研究表明A0纯铝在去离子水中很容易钝化.实验中用美国EG&G普林斯顿应用研究公司生产的273型恒电位/恒电流仪测量模拟孔电位,极化曲线表明模拟腐蚀坑处于钝化状态,即便是氧化膜破裂,腐蚀坑也发展得很慢.用pH计测量孔中pH的变化,并得到其工作曲线,此曲线表明带有氧化膜的点蚀坑坑内存在明显的酸化现象.并对A0铝池壳的服务寿命进行了估计.

Abstract:

The anode polarization curve of A0 pure aluminum in DI (de-ions) water was measured to simulate the pit corrosion of reactor pool shell. It confirmed the A0 aluminum is easy to passivate in DI water. The potential in the pit were determined with EG&G Princeton Applied Research Potentiostat/ Galvanostat Model 273, the polarization curve shows that the simulated corrosion pit was in passivated situation, even if the oxidization film was broken, the corrosion pit will probably develop slowly, the varied pH in pit was determined with pH measurer, and the working curves were obtained, which shows the obvious acidification exists in pit for the sample with oxidization film. The service life of A0 aluminum pool shell was estimated.