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What is Corrosion fatigue?


Corrosion fatigue is mechanical degradation process in both a corrosive and under cyclic loading conditions. Corrosion fatigue can occur in most of the materials. In corrosion fatigue, the crack propagates by the means of the trans-granular mechanism through the grain surface. Corrosion fatigue generates brittle fracture conditions. It increases the rate of crack propagation and changes the stress cycle frequency. Corrosion fatigue decreases the fatigue life of the metal. Corrosion fatigue can be prevented by vibration controlled conditions, proper material selection, proper design to reduce stress, use of inhibitors and coatings etc.

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