Corrosion fatigue is a type of material failure that occurs when a metal is subjected to cyclic stress in a corrosive environment. This process combines the effects of mechanical stress and chemical corrosion, leading to the formation of cracks over time. The repeated loading can weaken the material, making it more susceptible to damage. The presence of corrosive agents, such as saltwater or acidic substances, accelerates the degradation of the metal. As the cracks grow, they can eventually lead to catastrophic failure, making corrosion fatigue a significant concern in industries like aerospace, marine, and construction.