Abstract
Comparative analysis is provided for currently used and proposed criteria for stainless steel pitting resistance, i.e., the potential for forming a salt film. It is shown that the potential for forming a salt film is specified by current oscillations, that is a typical sign of pitting corrosion, and it makes it possible to predict stainless steel pitting corrosion limits more precisely. Comprehensive use of the applied and proposed pitting resistance criteria make it possible to separate clearly the possible conditions of a passive film in three areas: an area of a passive condition or stable passivity, where the probability of formation and development of previously occurring pitting is zero; an area of a metastable condition or unstable passivity within which there is a non-zero probability fore existence of previously occurring pitting and the generation of new repassivating pitting; an area of pitting formation where formation and a stable increase in pitting is possible.
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