**Abstract**

Corrosive behavior of austenitic chromium-nickel steels from the magnetic state (parameter χ0) of austenite, pre-formed to interact with aggressive media are research. Correlation between the rate *K* of pitting corrosion and the specific magnetic susceptibility χ<sup>0</sup> of austenite was experimentally established. It is experimentally established that the corrosion resistance of austenitic steels AISI304, 08Cr18Ni10, AISI 321, 08Cr18Ni10Тi (containing a low amount of δ-ferrite �0.005 … 0.5%) depends on the magnetic state of austenite: the corrosion rate of steel decreases with increases χ<sup>0</sup> austenite. The tendency of change in the corrosion rate of austenitic alloy with a high nickel content 06Crh28NiMoCuTi (not contain δ-ferrite) has the opposite character: with increasing χ0, the corrosion rate of the alloy increases is revealed. For austenitic chromium-nickel steels, the corrosion rates of the individual (austenite (*A*), δ-ferrite (*F*), strain-induced α<sup>0</sup> -martensite (*M*)) and total (*A* + *F*, *A* + *M* and *A* + *F* + *M*) phases are determined. It is proposed to predict corrosion according to the specific magnetic susceptibility χ<sup>0</sup> of austenite and the amount δ-ferrite.

**Keywords:** austenite, steel, specific magnetic susceptibility, ferrite, martensite, plastic deformation, corrosion
