Corrosion Behavior of 700L Automotive Beam Steel in Marine Atmospheric Environment
The marine atmospheric corrosion behavior of 700L high-strength automotive beam steel exposed for 36 months was investigated by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and electrochemical technology. The corrosion kinetics of 700L steel followed the exponential function: <i>D</i> = 4.85<i>t</i><sup>1.23</sup>. The rust layers were mainly composited of γ-FeOOH, α-FeOOH, γ-Fe<sub>2</sub>O<sub>3</sub>, and Fe<sub>3</sub>O<sub>4</sub>, regardless of the exposure duration. With an extended exposure time, the porosity, cracking, and spalling of the rust layers increased, and the densification and thickness uniformity decreased. Electrochemical measurements displayed that the corrosion resistance of the rusted 700L steel gradually decreased with increasing exposure time. A good correlation was found between rust layer composition, microstructure, and corrosion resistance.
Authors
- Younian He
- Guangwen Cao (ORCID: https://orcid.org/0000-0002-8094-1278)
- Yuwei Liu (ORCID: https://orcid.org/0000-0003-4134-1031)
- Chunlin He
- Zhenyao Wang (ORCID: https://orcid.org/0000-0002-8227-2602)
- Chuan Wang (ORCID: https://orcid.org/0000-0002-1858-6172)
Institutions
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Shenyang University (CN)
Publication Details
- Journal
- Materials
- Published
- 2024-10-11
- DOI
- https://doi.org/10.3390/ma17204964
- Citations
- 6
- Primary Topic
- Corrosion Behavior and Inhibition
- Type
- article
- Field-Weighted Citation Impact
- 0.70
Funders
- National Natural Science Foundation of China