The presence of a conductive layers of hot-formed oxide on the surface of bars for pre or post-compressing structures can promote localized attacks as a function of pH. The aggressive local environment in the occluded cells inside localized attacks has as consequence the possibility of initiation of stress corrosion cracking. In this paper, the stress corrosion cracking behavior of high strength steels proposed for tendons was studied by means of Constant Load (CL) tests and Slow Strain Rate (SSR) tests. Critical ranges of pH for cracking were verified. The promoting role of localized attack was confirmed. Further, electrochemical tests were performed on bars in as received surface conditions, in order to evaluate pitting initiation. The adverse effect of mill scale was recognized.

(2018). Effect of hot mill scale on hydrogen embrittlement of high strength steels for pre-stressed concrete structures [journal article - articolo]. In METALS. Retrieved from http://hdl.handle.net/10446/120434

Effect of hot mill scale on hydrogen embrittlement of high strength steels for pre-stressed concrete structures

Cabrini, Marina;Lorenzi, Sergio;Pastore, Tommaso;Pesenti Bucella, Diego
2018-01-01

Abstract

The presence of a conductive layers of hot-formed oxide on the surface of bars for pre or post-compressing structures can promote localized attacks as a function of pH. The aggressive local environment in the occluded cells inside localized attacks has as consequence the possibility of initiation of stress corrosion cracking. In this paper, the stress corrosion cracking behavior of high strength steels proposed for tendons was studied by means of Constant Load (CL) tests and Slow Strain Rate (SSR) tests. Critical ranges of pH for cracking were verified. The promoting role of localized attack was confirmed. Further, electrochemical tests were performed on bars in as received surface conditions, in order to evaluate pitting initiation. The adverse effect of mill scale was recognized.
journal article - articolo
2018
Cabrini, Marina; Lorenzi, Sergio; Pastore, Tommaso; PESENTI BUCELLA, Diego
(2018). Effect of hot mill scale on hydrogen embrittlement of high strength steels for pre-stressed concrete structures [journal article - articolo]. In METALS. Retrieved from http://hdl.handle.net/10446/120434
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/120434
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