论文部分内容阅读
为了深入理解核电蒸汽发生器传热管的点蚀,发展了利用元胞自动机(CA)模型模拟点蚀过程。元胞自动机的4个基本元素由电化学反应,化学反应和扩散过程决定。模拟结果通过定性和定量的方式与试验和已有文献进行了对比。结果显示:元胞自动机模拟能够较好的模拟出点蚀的萌生和亚稳态扩展过程,得到了点蚀坑的形状、腐蚀电流密度和Cl-对点蚀的影响,这些结果对蒸汽发生器传热管的结构完整性预测有重要影响。
In order to deeply understand the pitting corrosion of nuclear heat transfer tubes in steam generator of nuclear power plant, the development of the simulation of pitting corrosion by the cellular automata (CA) model has been developed. The four basic elements of cellular automata are determined by electrochemical reactions, chemical reactions and diffusion processes. The results of the simulation were compared qualitatively and quantitatively with those of the test and the available literature. The results show that the cellular automata simulation can better simulate the initiation and metastable expansion of pitting corrosion, and the shape of pits, the corrosion current density and the effect of Cl- on pitting corrosion are obtained. The heat transfer tube structural integrity prediction has a significant impact.