At the chemical process in the volume of a liquid reaction mixture in the presence of two specific groups of oxidizers in a metal reactor or reactor using metal elements, favourable conditions for abnormally rapid oxidation of the metal with subsequent destruction at room or close to them temperatures may appear. The condition for destruction is the process according to the cycle scheme with the regeneration of the metal oxidizer, which may initially be present in the system in catalytic or close to them quantities. In the presence of several metal elements, the destruction occurs all at the same time, but in different proportions. As a result, this leads to a deterioration in the characteristics of the process, and the process of destruction in the apparatus (reactor) can be accompanied by the emergence of a far unsafe, unpredictable situation.