Abstract
The crevice corrosion behavior of a nanocrystalline stainless steel (NCss) thin film fabricated by magnetron sputtering has been studied in chloride containing solution as compared to the coarse-grained stainless steel (CGss). The results show that the crevice corrosion resistance of the NCss thin film is much higher than that of the CGss. The pitting corrosion is the pre-step of the crevice corrosion for both samples, and crevice corrosion initiates from the metastable pitting. For the NCss, the nanostructure and uniform composition distribution decreases the pitting corrosion and promotes the formation of the continuous and uniform passive film, therefore increases the crevice corrosion resistance of the NCss.
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