Effect of Manganese on Pitting Properties of Type 301L Stainless Steel

Effect of chloride ions on corrosion behaviour of austenitic nickel and nickel free stainless steels in phosphoric acid solutions

“…Thus, in the presence of active ions, the increase in manganese content above 1% results in facilitation of pit formation processes and hampers repassivation ones. 27 Still, taking into consideration the low solubility of manganese phosphates, it was interesting to check the corrosion behaviour of high manganese stainless steels regarding its pitting corrosion resistance. One would expect that the manganese corrosion products could impede the pits’ growth in acid phosphate solutions, although at low pH value.…”

Effect of halide anions and temperature on initiation of pitting in Cr–Mn–N and Cr–Ni steels

“…Moreover, the replacement of nickel by manganese does not significantly change the corrosion behaviour of Cr-Mn-N steels with respect to that of conventional Cr-Ni steels. 5 However, according to Baba et al, 2 Mitrovic-Scepanovic and Brigham 6 and Lim et al, 7 an increase in the manganese content shifts the initiation potential for pitting in the negative direction.…”

Pitting corrosion of Cr–Mn–N steel in sulphuric acid media

“…Moreover, the repassivation of the pits developed on Cr18Mn12N steel surfaces is suppressed by the high manganese content which hinders the positive effect of nitrogen. To the best of our knowledge no reported results for the effect of manganese on repassivation exists; however, its high activity and the negative effect on passivity [2,14] suggest that the lower corrosion resistance of the new austenitic Electrolyte agitation leads to an increase in the average size and to a decrease in the maximum size of pits. The latter can be related to the enhanced repassivation ability of the open pits (Cr18Mn12N samples) by the rotation of the disk which allows nucleation of new pits near the repassivated ones.…”

“…Manganese as an alloying element of steels has been studied mainly due to the formation of anodic nonmetallic inclusions of manganese sulphide, the latter being the preferred sites for pit nucleation [2,13]. The alloying of steel with manganese under these studies is relatively low (up to 2%) and the results indicate its negative effect on the alloy resistance against pitting corrosion.…”

“…Numerous nitrogen containing stainless steels with different nitrogen content have been reported: classical Cr-Ni steels with incorporated nitrogen [1][2][3][4][5][6], Cr-Ni steels with reduced nickel content, partially or fully replaced by austenite forming elements, more frequently manganese, etc. [3].…”