Stress corrosion cracking of new 2001 lean–duplex stainless steel reinforcements in chloride contained concrete pore solution: An electrochemical study. (20th December 2018)

• Record Type: Journal Article
• Authors: Briz, E.; Biezma, M.V.; Bastidas, D.M.
• Is Part Of: Construction & building materials. Volume 192(2018)
• Page Start: 1
• Page End: 8
• Publication Date: 2018-12-20
• Subjects: Lean-duplex stainless steel -- Stress corrosion cracking -- Constant tensile load -- Concrete pore solution -- Chlorides; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.10.108
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: 2205 DSS and 2001 LDSS rebars SCC performance in simulated concrete pore solution. 2205 DSS did not develop pitting corrosion under SCC conditions in 8% Cl − electrolyte. 2001 LDSS developed pitting corrosion under same conditions. 2001 LDSS fracture surface evidence brittle fracture. Abstract: An experimental SCC tests has been performed on 2001 lean–duplex stainless steel (LDSS) and 2205 duplex stainless steel (DSS) reinforcements. Specimens were tested by loads up to 85% of their yield strength and simultaneously exposed to 8% chloride in simulated concrete pore solution. Although the maximum corrosion current density value obtained for 2001 LDSS was three times higher than 2205 DSS, specimens demonstrated passivity. Cycling polarization curve was performed which shows that 2205 DSS does not develop any pit but 2001 LDSS does. Finally, specimens were loaded until failure; fracture surface analysis detected a combination of ductile and brittle fracture mode in 2001 LDSS. Even if 2001 LDSS shows worse SCC performance, it is enough to ensure the nominal service life of reinforced concrete structures with lower cost.