Synergistic effects of fluoride and chloride on general corrosion behavior of AISI 316 stainless steel and pure titanium in H2SO4 solutions. (January 2018)

• Record Type: Journal Article
• Authors: Wang, Z.B.; Hu, H.X.; Zheng, Y.G.
• Is Part Of: Corrosion science. Volume 130(2018)
• Page Start: 203
• Page End: 217
• Publication Date: 2018-01
• Subjects: A. Titanium -- A. Stainless steel -- B. Polarization -- B. XPS -- C. Acid corrosion -- C. Passive films; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2017.10.028
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: F − and Cl − can accelerate the corrosion of 316 stainless steel in H2 SO4 solutions. The effects of Cl − on the corrosion of pure titanium depend on the F − content. Different synergistic effects of F − and Cl − on corrosion of two materials are found. Interaction effects of F − and Cl − on their ingress into the film are assessed by XPS. The general corrosion rates are compared for two materials under present conditions. Abstract: The general corrosion behavior of AISI 316 stainless steel (316 SS) and pure titanium (pure Ti) in H2 SO4 solutions containing fluoride (F − ) and chloride (Cl − ) ions was evaluated quantitatively using potentiodynamic polarization tests. The general corrosion resistance of these two materials to F − and Cl − is compared and explained by the proposed mechanisms based on XPS analyses. Furthermore, F − and Cl − are found to have synergistic effects on the general corrosion behavior of these two materials, which are attributed to the effects of F − and Cl − on the penetration of each other into the film.