The influence of passivation temperature on the corrosion resistance of passivation film for Q235 steel in simulated pore solution of concrete with chloride or/and sulfate ions

Abstract

The effect of temperature on the corrosion resistance performance of the passivation film (PF) formed at 20 °C to 60 °C was investigated systematically in Cl⁻ ion or/and SO₄²⁻ ion solution. It is found that the temperature accelerates the growth rate of PF and increases the thickness of PF. In addition, the critical chloride ion concentration of PF at 20 °C to 40 °C, and that of PF at 50 °C and 60 °C, which is increased by 15.8%. In the single SO₄²⁻, all the PF were not depassivated with the increased concentration of SO₄²⁻. However, at the presence of Cl⁻, the PF were depassivated once the concentration of SO₄²⁻ reaches 0.18 mol/L. These results show that in a single ion environment, the corrosion resistance of PF increased with the passivation temperature, while the impact of temperature on the corrosion resistance of PF is negligible in the combine solution of 3.5 wt% Cl⁻ and SO₄²⁻ ions.

Keywords:

• Passivation film
• carbon steel
• passivation temperature
• Cl⁻
• SO₄²⁻

Acknowledgements

All the support is gratefully appreciated.

Authors contribution statement

Haosen Jiang: Formal analysis, Data Curation, Writing. Xiaoying Zhang: Conceptualization, Methodology, Review & Editing, Supervision. Zuquan Jin: Funding acquisition, Project administration, Writing – Review and Editing. Yuehua Chen:Writing – Review and Editing, Visualization. Yue Liu: Validation.

Disclosure statement

No potential conflict of interest was reported by the authors.

Data availability statement

The data will not be available due to incomplete completion of the experiment.

Additional information

Funding

This work is a part of a series of projects financially supported by the National Natural Science Foundation of China (U2106221 and 52225905) and the MOUNT TAI Scholar of Shandong Province (ts20190942). In addition, this work is also supported by the National 111 project.