Service life extension of concrete structures by increasing chloride threshold using stainless steel reinforcements

Author(s): H. Mahmoud, M.C. Alonso, M. Sanchez
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 180 – 182
Total Pages: 3
Language: English

Abstract: 
Chloride Threshold (CT) of high strength and parent duplex stainless steel (2304 SS type) has been investigated employing accelerated electrochemical tests (potentiodynamic and potentiostatic techniques). The results show that 2304 SS has an excellent long-time corrosion resistance both in direct contact with alkaline environments that simulate the concrete pore solution and in mortar made with OPC. Potentiostatic tests give higher CT than potentiodynamic tests. The CT values measured in alkaline simulated pore solutions indicate that the cold drawn has higher corrosion resistance than the parent stainless steel, moreover the CT increases as the pH of the pore solution also does. The CT measured for 2304 duplex SS embedded in mortar and immersed in 1M NaCl solutions, using potentiostatic test, also confirm that cold drawn SS show higher CT (2.8 ± 0.3% total Cl by weight of cement) respect to parent SS (2.3 ± 0.2%).

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00