Behaviors of Perfluorocarbon Emulsion during Dissolution of Oxide Layers

This study investigates the dissolution behavior of oxide layers containing radionuclides using perfluorocarbon (PFC) emulsion as a reusable medium. Chemicals such as PFC, anionic surfactant, and H(2)SO(4) are used for preparing the PFC emulsion, and emulsified using an ultrasonication process. The FTIR results show O–H stretching that is formed by the interaction of the carboxyl group of the anionic surfactant with the hydroxyl group of water containing H(2)SO(4), and find that the H(2)SO(4) can be homogeneously dispersed in the PFC–anionic surfactant–H(2)SO(4) emulsion. The dissolution test of the simulated Cr(2)O(3) specimen is conducted using PFC emulsion containing KMnO(4). Through the weight losses of specimens and Scanning Electron Microscope-Energy Dispersive X-ray Spectrometer (SEM-EDS) analysis, it is confirmed that the Cr(2)O(3) layer on the SUS304 specimen is easily dissolved using PFC emulsion. During the dissolution of the Cr(2)O(3), it is observed that the dispersed H(2)SO(4)–KMnO(4) became unstable and separated from PFC emulsion. Based on these results, the behavior of the PFC emulsion during the dissolution of the oxide layer is explained.