Enhanced localized and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel in high-concentration hydrochloric acid solutions at room temperature. Issue 12 (December 2018)

• Record Type: Journal Article
• Authors: Wang, S.G.; Sun, M.; Xu, Y.H.; Long, K.; Zhang, Z.D.
• Is Part Of: Journal of materials science & technology. Volume 34:Issue 12(2018)
• Page Start: 2498
• Page End: 2506
• Publication Date: 2018-12
• Subjects: Stainless steels -- Localized corrosion -- Severe rolling technique -- X-ray photoelectron spectroscopy -- Ultra-violet photoelectron spectroscopy; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2018.06.006
• Languages: English
• ISSNs: 1005-0302

Abstract

Graphical abstract: Abstract: The localized and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel (NC-304SS) produced by severe rolling technique, and its conventional polycrystalline 304 stainless steel (CC-304SS) counterpart, were investigated in high-concentration hydrochloric acid solutions at room temperature. NC-304SS can scarcely suffer from localized corrosion in 4 mol/L and 5 mol/L HCl solutions during 5-day immersion tests, and in 1–3 mol/L HCl solutions during thirty-five-day immersion tests. The corrosion rate of NC-304SS was also less than that of CC-304SS during these immersion tests. The improved localized and uniform corrosion resistances of NC-304SS were explained in terms of the adsorption and chemical activity of Cl − on NC-304SS and CC-304SS characterized by X-ray photoelectron spectroscopy, and the valence electron configurations of NC-304SS and CC-304SS were characterized by ultra-violet photoelectron spectroscopy rather than conventional electrochemical results.