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Enhancing General Corrosion Resistance of Biomedical High Nitrogen Nickel-Free Stainless Steel by Nitric Acid Passivation

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Abstract

A systematic study of nitric acid passivation was investigated to enhance the general corrosion resistance of biomedical high-nitrogen nickel-free stainless steels (HNSs). After passivation, the corrosion rate of HNS could dramatically reduce to 1/20 of the untreated in 37 °C 0.9 wt% NaCl solutions. Then, the passive film on HNS was analyzed by X-ray photoelectron spectroscopy. It was found that chromium enrichment in the passive film and nitrogen enrichment in the film/metal interface contributed to the improvement in general corrosion resistance of HNS.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51801220), the Key Program of China on Biomedical Materials Research and Tissue and Organ Replacement (No. 2016YFC1101804 and 2016YFC1100604) and the Shenyang Key R&D and Technology Transfer Program (No. Z18-0-027).

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Correspondence to Qingchuan Wang.

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Available online at http://link.springer.com/journal/40195

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Yang, Y., Wang, Q., Li, J. et al. Enhancing General Corrosion Resistance of Biomedical High Nitrogen Nickel-Free Stainless Steel by Nitric Acid Passivation. Acta Metall. Sin. (Engl. Lett.) 33, 307–312 (2020). https://doi.org/10.1007/s40195-019-00952-w

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Keywords

  • Stainless steel
  • Nitric acid passivation
  • General corrosion
  • Passive film