Cavitation Erosion Behaviors of a Nickel-Free High-Nitrogen Stainless Steel
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The cavitation erosion and corrosion characteristic of a nickel-free high-nitrogen stainless steel (HNSS) in distilled water and 0.5 mol/L HCl solution were investigated by conducting gravimetric and electrochemical measurements, including corrosion potential, polarization curves and electrochemical impedance spectroscopy, and the eroded/corroded surface was observed by scanning electron microscopy. The results revealed that the dominant contribution to cavitation erosion damage was the mechanical degradation process, even though the corrosion rate of HNSS was accelerated in 0.5 mol/L HCl solution. Corrosion and mechanical degradation worked synergistically and promoted crack initiation and propagation under cavitation erosion.
KeywordsHigh-nitrogen stainless steel Cavitation erosion Corrosion Synergistic effect
We would like to express our gratitude to the financial support of the National Natural Science Foundation of China (Nos. 51401092, 51131008, 51434004, U1435205, and 51304041) and Science and Technology Program of Jiangsu Province (BE2017143).
- 3.Qiao, Y.X., Wang, S., Liu, B., Zheng, Y.G., Li, H.B., Jiang, Z.H.: Synergistic effect of corrosion and cavitation erosion of high nitrogen stainless steel. Acta Metall. Sin. 52, 233–240 (2016)Google Scholar
- 4.Qiao, Y.X., Cai, X., Cui, J., Tang, Y.B., Li, H.B., Jiang, Z.H.: Cavitation erosion properties of a nickel-free high-nitrogen Fe–Cr–Mn–N stainless steel. Mater. Technol. 51, 933–938 (2017)Google Scholar
- 14.ASTM G32-10: Standard Test Method for Cavitation Erosion Using Vibratory Apparatus. West Conshohocken: ASTM International (2010). http://www.astm.org
- 15.Mitelea, I., Micu, L.M., Bordeasşu, I., Crãciunescu, C.M.: Cavitation erosion of sensitized UNS S31803 duplex stainless steels. J. Mater. Eng. Perform. 25, 2016–1939 (2018)Google Scholar