What are the effects of prolonged exposure to foggy or misty environments on composites?

Prolonged exposure to foggy or misty environments can significantly impact the performance and longevity of composite materials. Composites, often used in aerospace, automotive, and marine industries, are susceptible to moisture absorption when exposed to high humidity or constant mist. Over time, this moisture infiltration can lead to fiber-matrix debonding, reduced mechanical strength, and accelerated degradation.

Fog and mist create a persistent damp environment, which may cause chemical reactions within the resin matrix, such as hydrolysis, weakening the material's structural integrity. Additionally, temperature fluctuations in such environments can exacerbate thermal expansion mismatches between fibers and the matrix, further compromising durability.

To mitigate these effects, manufacturers often apply protective coatings or use moisture-resistant resins. Regular inspections and maintenance are also critical to identifying early signs of damage. Understanding these challenges helps engineers design more resilient composites for fog-prone applications.