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Influence of stress on passive behaviour of steel bars in concrete pore solution
The influence of stress on passive behaviour of steel bars in concrete pore solution was studied with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. The passive ability of steel decreased as the applied load increased and higher load had much greater influence on passivation than repeated loading of small magnitude. A micro-crack model was presented to explain the damage of passive layer by loads. Lower load caused micro-cracks in the passive film which might be completely recovered after unloading. Under higher load more micro-cracks were produced in the passive film and some may penetrate the film, leading to irreversible damages.
Influence of stress on passive behaviour of steel bars in concrete pore solution
The influence of stress on passive behaviour of steel bars in concrete pore solution was studied with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. The passive ability of steel decreased as the applied load increased and higher load had much greater influence on passivation than repeated loading of small magnitude. A micro-crack model was presented to explain the damage of passive layer by loads. Lower load caused micro-cracks in the passive film which might be completely recovered after unloading. Under higher load more micro-cracks were produced in the passive film and some may penetrate the film, leading to irreversible damages.
Influence of stress on passive behaviour of steel bars in concrete pore solution
Einfluss von mechanischer Spannung auf das Passivverhalten von Armierungsstahl in Betonporenlösung
Feng, Xingguo (author) / Tang, Yuming (author) / Yu Zuo (author)
Corrosion Science ; 53 ; 1304-1311
2011
8 Seiten, 16 Bilder, 26 Quellen
Article (Journal)
English
Betonstahl , mechanische Spannung , Passivierung , Passivitätsdurchbruch , Betonkorrosion , Porenlösung , Mikroriss , Rissausbildung , Passivschicht , unlegierter Stahl , alkalische Lösung , Korrosionspotenzial , plastische Verformung , zyklische Belastung , Portlandzement , elektrochemische Impedanzspektrometrie , Zeitabhängigkeit , Oberflächenbeschaffenheit
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