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Corrosion Behavior of 700L Automotive Beam Steel in Marine Atmospheric Environment

Year: 2024

Type: article

Abstract: 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: D = 4.85t1.23. The rust layers were mainly composited of γ-FeOOH, α-FeOOH, γ-Fe2O3, and Fe3O4, 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.

Source: Materials

DOI: 10.3390/ma17204964

Authors: Younian He, Yuwei Liu, Chuan Wang, Gongwang Cao, Chunlin He, Zhenyao Wang

Institutions: University of Science and Technology of China, Chinese Academy of Sciences, Institute of Metal Research, Shenyang University

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,955

Funder: National Natural Science Foundation of China