What impact does biological fouling have on marine corrosion?

Biological fouling refers to the accumulation of microorganisms, plants, algae, and animals on submerged surfaces like ship hulls. This phenomenon has a significant impact on marine corrosion, notably by reducing the effectiveness of protective coatings. When biological organisms attach to a surface, they can trap moisture and create an environment that fosters corrosion.

Moreover, fouling can disrupt the barrier that protective coatings provide, allowing water and corrosive agents to reach the metal beneath. This undermines the integrity of the coating over time, leading to localized corrosion or breakdown of the protective layer. Essentially, a fouled surface becomes less able to protect against environmental factors that contribute to corrosion, making it critical to manage biological fouling to maintain the longevity and performance of marine structures.

While biological fouling does not enhance protective measures or solely increase salinity, it actively detracts from them, emphasizing the importance of understanding its role in marine corrosion.