Susceptibility of Automobile Spring Steels to Wet-Dry Cyclic Corrosion Induced Environmental Embrittlement

Abstract:

The susceptibility to environmental embrittlement (EE) of automobile spring steels was investigated using six different steels. A SSRT test and TDS analysis were applied to specimens subjected to wet-dry cyclic corrosion tests in a NaCl solution. Experimental results revealed that the reduction in ductility after the corrosion tests was pronounced with increasing strength level. This degradation was closely associated with the resistance to pitting corrosion. Consequently, the hydrogen absorbed in steel and the corrosion pit as a geometric damage were responsible for the EE of spring steels. The hydrogen in rust layer had no significant influence on the EE.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 933-938
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.933
• Online since: November 2005
• Authors: K. Kobayashi, Shinichi Komazaki, Toshihei Misawa, T. Fukuzumi
• Keywords: Automobile Spring Steel, Environmental Embrittlement, Hydrogen Embrittlement, Pitting Corrosion, Rust, Wet-Dry Cyclic Corrosion

References

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