Kinetics of Dissolution of Magnetite in PDCA Based Formulations
Kinetics of Dissolution of Magnetite in PDCA Based Formulations
复制标题
基于 PDCA 的配方中磁铁矿溶解动力学
DOI：
10.3327/jnst.34.810
复制
发表时间：
1997
影响因子：
1.2
通讯作者：
S. V. Narasimhan
中科院分区：
文献类型：
--
作者：
S. Ranganathan;A. Prince;P. Raghavan;R. Gopalan;M. P. Srinivasan;S. V. Narasimhan
磁铁矿是重水堆（PHWRs）的重要腐蚀产物之一，其中碳钢是重水堆一次传热系统的主要表面。设计能够溶解磁铁矿的配方对于有效地净化这些表面是很重要的。研究了合成磁铁矿在含酸性配方的低浓度PDCA溶液中的溶解速率。研究了添加抗坏血酸、柠檬酸、Fe2+-PDCA络合物对反应速率的影响。测定了pH和温度对溶出速率的影响。PDCA作为络合剂具有质子化常数低、辐射稳定性强等优点。
Magnetite is one of the important corrosion products of pressurised heavy water reactors (PHWRs) where carbon steel is the dominant surface in the primary heat transport system. Designing of formulations capable of dissolving magnetite is important for effective decontamination of such surfaces. The rate of dissolution of synthetically prepared magnetite was studied in low concentrations of PDCA containing acidic formulations. The effect of addition of ascorbic acid, citric acid, Fe2+-PDCA complex on the rate was also studied. The effects of pH and the temperature on the dissolution rate were determined. The PDCA as a complexant has some positive factors like low protonation constant and enhanced stability to radiation.