Corrosion behavior of duplex stainless steel reinforcement in ternary binder concrete exposed to natural chloride penetration

Published on Feb 28, 2019in Construction and Building Materials6.141
路 DOI :10.1016/J.CONBUILDMAT.2018.12.036
M.C. Alonso11
Estimated H-index: 11
(CSIC: Spanish National Research Council),
F.J. Luna1
Estimated H-index: 1
(CSIC: Spanish National Research Council),
Maria Criado27
Estimated H-index: 27
(CSIC: Spanish National Research Council)
Sources
Abstract
Abstract The corrosion behavior duplex stainless steel rebars embedded in concrete exposed to natural chloride penetration has been carried out. Three duplex stainless steels (DSSs) differentiated in the Ni, Mo and Mn content and two types of concretes elaborated with different binders, Portland cement and Portland cement blended with Slag and Limestone, were employed. The corrosion behavior was followed through Ecorr and Rp measurements along the exposure period. The tests were extended up to corrosion detection or to 2鈥痽ears, and the chloride contents accumulated at the rebar level were determined. The DSS with lower Ni content has demonstrated to show lower corrosion resistance in presence of chlorides and pitting corrosion at lower chloride contents accumulated at the rebar level were detected. The DSSs embedded in OPC concrete resist better to corrosion in presence of chlorides than those rebars embedded in concrete containing blast furnace slag and limestone.
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