CorroZone Podcast · 16 Jun 2026
Crevice Corrosion
- Free
- Lecture
- Beginner
- ~32 min
Why occluded geometries corrode: the geometric features that create susceptibility, the three-phase initiation (oxygen depletion, metal-ion hydrolysis, chloride migration), the critical crevice solution, the autocatalytic self-sustaining propagation, how crevice differs from pitting, the engineering risk factors (geometry, PREN, temperature, chloride), and prevention.
Show notes
What you'll learn
- Identify the geometric features that create susceptibility to crevice corrosion in engineering structures
- Explain the three-phase initiation mechanism: oxygen depletion, metal-ion hydrolysis, and chloride migration
- Define the critical crevice solution and explain why it forms inside crevice geometries
- Describe the autocatalytic propagation mechanism and why crevice corrosion is self-sustaining
- Compare crevice corrosion and pitting corrosion in terms of initiation mechanism, required conditions, and propagation chemistry
- Apply engineering factors (geometry, PREN, temperature, chloride) to assess crevice corrosion risk
- Recommend appropriate prevention strategies based on design, materials selection, and protection systems
Who this is for
Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.
What you'll learn
- Identify the geometric features that create susceptibility to crevice corrosion in engineering structures
- Explain the three-phase initiation mechanism: oxygen depletion, metal-ion hydrolysis, and chloride migration
- Define the critical crevice solution and explain why it forms inside crevice geometries
- Describe the autocatalytic propagation mechanism and why crevice corrosion is self-sustaining
- Compare crevice corrosion and pitting corrosion in terms of initiation mechanism, required conditions, and propagation chemistry
- Apply engineering factors (geometry, PREN, temperature, chloride) to assess crevice corrosion risk
- Recommend appropriate prevention strategies based on design, materials selection, and protection systems