What are the effects of prolonged exposure to de-icing salts on composite materials?

Prolonged exposure to de-icing salts can significantly impact the performance and longevity of composite materials. These salts, commonly used on roads and pavements during winter, accelerate corrosion and degradation in composites, particularly those with metal reinforcements or polymer matrices. Key effects include reduced mechanical strength, surface pitting, and delamination due to chemical reactions with salt residues. Additionally, moisture absorption increases in polymer-based composites, leading to swelling and loss of structural integrity. Preventive measures such as protective coatings or salt-resistant material selection are critical for mitigating these adverse effects in harsh environments. Understanding these impacts is essential for engineers and designers working with composites in cold climates.