Corrosion Fatigue

Definition - What does Corrosion Fatigue mean?

Corrosion fatigue is the loss of strength of a material caused by simultaneous, repeated or changing stresses exasperated by a corrosive environment. This is especially important because nearly all materials experience cyclic stresses and exposure to a corrosive environment during their service life. As stress is increased on a material in a corrosive environment, such as saltwater, the number of cycles it can endure without failure decreases.

Trenchlesspedia explains Corrosion Fatigue

When exposed to a corrosive environment, materials lose some of their service life and are more likely to experience mechanical fatigue. Rapidly fluctuating stresses, even those below the rated tensile strength of the material, can cause failure in the material. Corrosion fatigue can be controlled by lowering the cyclic mechanical stresses, redistributing stress, avoiding internal stress, taking measures to avoid rapid changes of temperature and by a multitude of corrosive control measures. Corrosion fatigue is normally transgranular and does not show branching.

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