Abstract: Background: As one of the important techniques, coating decontamination technology can effectively deal with radioactive residues of nuclear accident. Decontaminating materials and its operating machines are important parts of coating decontamination technology. There are, however, some problems in the process of spraying decontaminating materials, such as the decontaminant inhomogeneouslly mixed and hard-to-peel the coating. Purpose: The well designed dynamic mixer can solve the issue of the decontaminant inhomogeneous-mixing. Methods: A new dynamic mixer is developed. The testing system of the dynamic hybrid characteristics of the decontaminating materials is set up to verify the rationality of the designed dynamic mixer. The tests of the mixing uniformity of the decontaminant, the film formation time, the stripping characteristics of the decontaminant, the microstructure and tensile strength of the coating are carried out. Results: The decontaminant material is evenly mixed. The mechanical property of the material film and the stripping characteristics meet the application requirements. Conclusions: The new designed dynamic mixer has good performance. The results of the study could provide important technical support for the improvement design of the decontamination vehicle.

Key words: coating decontaminant, dynamic mixer, testing system, mixing uniformity