Decontamination and corrosion have been studied in the following solutions: chromic-phosphoric acid, diammonium citrate, triammonium citrate and the tetrasodium salt of EDTA. High decontamination factors of aluminum, contaminated with60Co, were obtained in the solution of chromic-phosphoric acid, di- and triammonium citrate. In the solution of the tetrasodium salt of EDTA, decontamination factors were low. Highest uniform corrosin has caused a solution of the tetrasodium salt of EDTA, up to 11 g/m2. h. The solution of triammonium citrate has very mild uniform etching action on aluminum. Total weight losses observed in the diammonium citrate solution were approximately equal, while corrosion was nonuniforn. This solution caused a local attack and pits. Chromic-phosphoric acid had also slight action on aluminum.