KINETICS OF DISSOLUTION OF MAGNETITE IN PDCA BASED FORMULATIONS

Magnetite is one of the important corrosion products of pressurised he avy water reactors (PHWRs) where carbon steel is the dominant surface in the primary heat transport system. Designing of formulations capabl e of dissolving magnetite is important for effective decontamination o f such surfaces, The rate of dissolution of synthetically prepared mag netite was studied in low concentrations of PDCA containing acidic for mulations. The effect of addition of ascorbic acid! citric acid, Fe2+- PDCA complex on the rate was also studied, The effects of pH and the t emperature on the dissolution rate were determined, The PDCA as a comp lexant has some positive factors like low protonation constant and enh anced stability to radiation.