The combined action of a static tensile stress and corrosion which forms cracks and eventually catastrophic failure of the component. This is specific to a metal material paired with a specific environment.
Prevention
Prevention can be achieved by:
- Reducing the overall stress level and designing out stress concentrations
- Selection of a suitable material not susceptible to the environment
- Design to minimise thermal and residual stresses
- Developing compressive stresses in the surface the material
- Use of a suitable protective coating
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