| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1470501 | Corrosion Science | 2011 | 8 Pages |
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.
Research highlights► The influence of load on passivity of steel in concrete pore solution is studied. ► The passivity of steel in pore solution decreased as the load amplitude increased. ► A micro-crack model is presented to explain passive behaviour of steel under loads.
