Corrosion Fatigue and Electrochemical Reactions in Modified HY130 Steel.
Abstract
To investigate the relationship between corrosion fatigue crack growth response of high strength steels in aqueous environments and electrochemical reactions at the crack tip, fatigue and electrochemical simulation tests were carried out on a modified HY-130 steel in acetate buffer solution. Corrosion fatigue crack growth rate were determined as a function of temperature (276 to 363 K) and frequency (0.03 to 10 Hz) under open circuit conditions. The electrochemical simulation experiments were carried out over the same range of temperatures, and measured the galvanic current transient between a clean and an oxidized surface and the corresponding mixed potential. These experiments were based on the assumption that the newly created surfaces at the crack tip and its neighboring oxidized surfaces formed a localized galvanic cell. Results from the two sets of experiments strongly suggested electrochemical reaction control of corrosion fatigue crack growth. The electrochemical experiments indicated that hydrogen evolution in this system followed the Volmer-Heyrovsky mechanism. Keywords: Environmental effects; Electrochemistry; Fracture mechanics.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1986
- Accession Number
- ADA172242
Entities
People
- Gunchoo Shim
- Robert P. Wei
Organizations
- Lehigh University