Failure Pattern
Seen in both static and dynamic seals, the surface of the o-ring appears pitted and/or cracked, often accompanied by the flatness of high compression set.
![o-ring oxidation](http://s3.amazonaws.com/applerubber/sdg/oring-oxidation.png)
Problem Sources
- Excessive temperature causing elastomer hardening
- Evaporation of plasticizers
- Cracking from oxidation
Suggested Solutions
- Specify high temperature o-ring materials with antioxidants
- Lower the operating temperature