The corrosion behavior of nitrogen-containing martensitic stainless bearing steel in salt spray corrosion environment was studied and compared with 9Cr18 stainless bearing steel. The results show that the nitrogen-containing martensitic stainless steel bearing steel has better corrosion resistance than 9Cr18 stainless steel bearing steel. Compared with 9Cr18 stainless bearing steel, the corrosion morphology of nitrogen-containing martensitic stainless bearing steel in salt spray corrosion environment is mainly pitting corrosion. The corrosion area did not increase significantly with the increase of corrosion time. When the corrosion time reached 120h, the corrosion area ratio was only 0.44%. The average corrosion rate and corrosion depth of nitrogen-containing martensitic stainless bearing steel were 0.026 gÂ·m-2Â·h-1 and 2.3 Î¼m, respectively, which were lower than those of 9Cr18 stainless steel by 60.6% and 66.2%, respectively. The small size and uniform distribution of carbides in the nitrogen-bearing martensitic stainless bearing steel play an important role in improving its corrosion resistance.
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