“…Previous works (Murgulescu and Radovici, 1960, Knyazheva et al, 1965, Condylis et al, 1970, Shams et al, 1973, Lunarska et al, 1975 showed that Mn addition exerted a detrimental effect on the passivation of austenitic stainless steels (without any further explanation) and showed a deleterious effect on the pitting corrosion of austenitic steels, due to the increase in the amount of MnS inclusions (Ryan et al, 2002, Schmuki et al, 2005, Pardo et al, 2008. Considering that the sulfur content in current steels is 20 ppm maximum (see Table 1), there must be a limit (given by the mass balance) for the amount of MnS inclusions, which can be formed in these steels by increasing the Mn content.…”